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EP1812438A1 - Method for producing chiral 8-(3-amino-piperidin-1-yl)-xanthines - Google Patents

Method for producing chiral 8-(3-amino-piperidin-1-yl)-xanthines

Info

Publication number
EP1812438A1
EP1812438A1 EP05804601A EP05804601A EP1812438A1 EP 1812438 A1 EP1812438 A1 EP 1812438A1 EP 05804601 A EP05804601 A EP 05804601A EP 05804601 A EP05804601 A EP 05804601A EP 1812438 A1 EP1812438 A1 EP 1812438A1
Authority
EP
European Patent Office
Prior art keywords
methyl
piperidine
group
phthalimido
butyn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05804601A
Other languages
German (de)
French (fr)
Inventor
Waldemar Pfrengle
Thorsten Pachur
Thomas Nicola
Adil Duran
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Boehringer Ingelheim International GmbH
Boehringer Ingelheim Pharma GmbH and Co KG
Original Assignee
Boehringer Ingelheim International GmbH
Boehringer Ingelheim Pharma GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Boehringer Ingelheim International GmbH, Boehringer Ingelheim Pharma GmbH and Co KG filed Critical Boehringer Ingelheim International GmbH
Priority to DK10181043.0T priority Critical patent/DK2287164T5/en
Priority to EP15200579.9A priority patent/EP3029040B1/en
Priority to PL15200579T priority patent/PL3029040T3/en
Priority to PL10181043T priority patent/PL2287164T3/en
Priority to EP19166570.2A priority patent/EP3539956A1/en
Priority to EP10181043.0A priority patent/EP2287164B9/en
Priority to DK15200579.9T priority patent/DK3029040T3/en
Publication of EP1812438A1 publication Critical patent/EP1812438A1/en
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00—Medicinal preparations containing organic active ingredients
    • A61K31/33—Heterocyclic compounds
    • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
    • A61K31/495—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with two or more nitrogen atoms as the only ring heteroatoms, e.g. piperazine or tetrazines
    • A61K31/505—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim
    • A61K31/519—Pyrimidines; Hydrogenated pyrimidines, e.g. trimethoprim ortho- or peri-condensed with heterocyclic rings
    • A61K31/52—Purines, e.g. adenine
    • A61K31/522—Purines, e.g. adenine having oxo groups directly attached to the heterocyclic ring, e.g. hypoxanthine, guanine, acyclovir
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/02—Drugs for skeletal disorders for joint disorders, e.g. arthritis, arthrosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P19/00—Drugs for skeletal disorders
    • A61P19/08—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease
    • A61P19/10—Drugs for skeletal disorders for bone diseases, e.g. rachitism, Paget's disease for osteoporosis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00—Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/04—Anorexiants; Antiobesity agents
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00—Drugs for disorders of the metabolism
    • A61P3/08—Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10—Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P37/00—Drugs for immunological or allergic disorders
    • A61P37/02—Immunomodulators
    • A61P37/06—Immunosuppressants, e.g. drugs for graft rejection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00—Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D401/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom
    • C07D401/02—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings
    • C07D401/04—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, at least one ring being a six-membered ring with only one nitrogen atom containing two hetero rings directly linked by a ring-member-to-ring-member bond
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D473/00—Heterocyclic compounds containing purine ring systems
    • C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/04—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D473/00—Heterocyclic compounds containing purine ring systems
    • C07D473/02—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6
    • C07D473/04—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms
    • C07D473/06—Heterocyclic compounds containing purine ring systems with oxygen, sulphur, or nitrogen atoms directly attached in positions 2 and 6 two oxygen atoms with radicals containing only hydrogen and carbon atoms, attached in position 1 or 3
    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07B—GENERAL METHODS OF ORGANIC CHEMISTRY; APPARATUS THEREFOR
    • C07B2200/00—Indexing scheme relating to specific properties of organic compounds
    • C07B2200/07—Optical isomers

Definitions

  • the invention relates to an improved process for the preparation of chiral 8- (3-aminopiperidin-1-yl) xanthines, their enantiomers and their physiologically acceptable salts.
  • R 2 in which R 1 is, for example, an optionally substituted arylmethyl or an optionally substituted heteroarylmethyl group, R 2 is, for example, an alkyl group and R 3 is, for example, an optionally substituted benzyl group or a straight-chain or branched alkenyl or alkynyl group, are already known from international applications WO 02/068420, WO 04/018468, WO 04/018467, WO2004 / 041820 and WO 2004/046148 are known in which compounds with valuable pharmacological properties are described, in particular an inhibitory effect on the activity of the enzyme dipeptidyl peptidase IV (DPP -IV).
  • DPP -IV dipeptidyl peptidase IV
  • compounds of this type are for the prevention or treatment of diseases or conditions associated with increased DPP-IV activity or which can be prevented or alleviated by reduction of DPP-IV activity, in particular diabetes mellitus type I or type II, Prediabetes, or decreased glucose tolerance.
  • WO 04/018468 discloses a preparation process in which 8- (3-aminopiperidin-1-yl) xanthines are prepared by deprotection of a corresponding tert-butyl oxycarbonyl-protected derivative of the general formula (II) ,
  • Suitable solvents are tetrahydrofuran (THF), dioxane, N, N-dimethylformamide (DMF), dimethylacetamide (DMA), N-methyl-2-pyrrolidone (NMP) or dimethyl sulfoxide (DMSO).
  • THF tetrahydrofuran
  • DMF N, N-dimethylformamide
  • DMA dimethylacetamide
  • NMP N-methyl-2-pyrrolidone
  • DMSO dimethyl sulfoxide
  • DMSO dimethyl sulfoxide
  • phthalyl is deprotected by known methods. Possible cleavage methods are described, for example, by TW Greene in Protective Groups in Organic Synthesis, Wiley 1981 on page 265 (eg hydrazine in ethanol).
  • X is a leaving group selected from the group of the halogens, for example a fluorine, chlorine or bromine atom, or the sulfonic acid esters, for example a phenylsulfonyloxy, p-toluenesulfonyloxy, methylsulfonyloxy or trifluoromethylsulfonyloxy group
  • R 1 is a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, quinazolinylmethyl, quinoxalinylmethyl, naphthyridinylmethyl or phenanthridinylmethyl group in which in each case the aromatic or heteroaromatic part is replaced by R 3 mono is - or disubstituted, where the substituents may be the same or different and
  • R 3 represents a hydrogen, fluorine, chlorine or bromine atom or a cyano, methyl, trifluoromethyl, ethyl, phenyl, methoxy, difluoromethoxy, trifluoromethoxy or ethoxy group, or two radicals R a , if bound to adjacent carbon atoms, may also be a -O-CH 2 -O- or -O-CH 2 -CH 2 -O- group,
  • R 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and
  • R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl , 2-iodobenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl or 2-cyanobenzyl group.
  • the process is for those compounds in which
  • X is a chlorine or bromine atom
  • R 1 is a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, quinazolinylmethyl, quinoxalinylmethyl or naphthyridinylmethyl group in which the aromatic or heteroaromatic part in each case is mono- or disubstituted by R 3 is, wherein the substituents may be the same or different and
  • R 3 is a hydrogen, fluorine or chlorine atom or a cyano, methyl, ethyl,
  • R 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl , 2-iodobenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl, or 2-cyanobenzyl group.
  • X is a chlorine or bromine atom
  • R 1 is a cyanobenzyl, (cyanopyridinyl) methyl, quinolinylmethyl, (methylquinolinyl) methyl, isoquinolinylmethyl, (methylisoquinolinyl) methyl, quinazolinylmethyl, (methylquinazolinyl) methyl, quinoxazinylmethyl, (methylquinoxalinyl) methyl, ( Dimethyoxinoxalinyl) methyl or naphthyridinylmethyl group,
  • R 2 is a methyl, cyclopropyl or phenyl group
  • R 3 represents a 2-butene-1-yl, 3-methyl-2-butene-1-yl, 2-butyn-1-yl, 2-chlorobenzyl, 2-bromobenzyl or 2-cyanobenzyl group .
  • each (R) -3- (phthalimido) piperidine is used as the reagent.
  • the preparation of the compounds of the formula (III) is described in the literature already cited above and is carried out by processes known per se.
  • Another subject of the invention is a process for the preparation of optically active 3- (phthalimido) piperidine.
  • 3-aminopyridine is first hydrogenated by means of processes known per se.
  • the resulting racemic 3-aminopiperidine is then converted to the corresponding phthalimide using phthalic anhydride.
  • the (R) -enantiomer can be selectively precipitated by means of D-tartaric acid.
  • the (S) -enantiomer of (IV) can furthermore be obtained in a simple manner by addition of L-tartaric acid, without prior separation of the excess of D-tartaric acid still present in the mother liquor.
  • the reaction also succeeds under less drastic pressures.
  • the feed vessel is rinsed with 2 liters of 1, 4-dioxane. Thereafter, the reactor contents are heated to 6 0 C and stirred for about 2 hours.
  • a mixture of 122 liters of water and 62.04 kg (775.31 mol) of sodium hydroxide solution (50%) is introduced and cooled to 6 ° C.
  • the reaction mixture from the first reactor is added in portions.
  • the internal temperature is a maximum of 11 ° C.
  • the first reactor is first rinsed with 6 liters of 1, 4-dioxane and then with 6 liters of water. The resulting suspension is stirred for another 30 minutes at 5 ° C.
  • the feed vessel is 2.5 Liters of N-methyl-2-pyrrolidone rinsed and then the reaction mixture for 2 hours at 140 0 C stirred. After completion of the reaction, the reaction mixture is cooled to 60 0 C and diluted with 80 liters of methanol. The resulting suspension is stirred for 30 minutes at 5O 0 C, then cooled to 23 ° C and stirred for 30 minutes. The product is then centrifuged off and washed 3 times with 20 liters of methanol each time. It is dried in a drying oven under inerting at 45 ° C ge.
  • the combined toluene phases are washed twice with 8 liters of 75-80 0 C warm water. From the toluene phase 22 liters of toluene are distilled off under vacuum. To the resulting suspension 4 liters of tert-butyl methyl ether is added and then cooled to 0-5 0 C at 40-50 0 C. The product is isolated by filtration, washed with tert-butyl methyl ether and sucked dry. The wet crude substance is then heated to reflux with 5 times the amount of absolute ethanol and the hot solution is filtered through activated charcoal clear.
  • step d Alternative method for step d:
  • the organic phase is washed with 2.8 l of water at 55-65 0 C and then closing separated. 4.2 l of the organic phase are distilled off under reduced pressure. Then, at 65-75 ° C., 1, 4 l of methylcyclohexane are added, whereby the product crystallizes. The suspension is stirred for 8-16 h at 15-25 ° C and then cooled to 0-5 ° C. The product is isolated by filtration, washed with 4.2 l of methylcyclohexane and sucked dry and dried in vacuo at 35 ° C.
  • the dried crude substance (991 g) is then heated to reflux with 5 times the amount of methanol, activated charcoal added and filtered.
  • the filtrate is reduced by distilling off methanol to a volume of 1.5 l.
  • the suspension is cooled to 0-5 0 C, stirred for 2 hours, filtered off with suction, washed with tert-butyl methyl ether and dried in a vacuum oven at 35 ° C.
  • Variant to process step a 3-Covano-2- (chloromethyl) -pyridine 20.0 g (131.45 mmol) of 2-hydroxymethyl-3-pyridinecarboxamide are suspended in 110 ml of acetonitrile and heated to 78.degree. Within 15 minutes, 60.65 g (395.52 mmol) of phosphorus oxychloride are metered in and heated to 81 ° C. for 2 hours. After cooling to 22 ° C, the reaction mixture is stirred into 200 ml of 40 0 C warm water. After addition of 100 ml of toluene is neutralized with sodium hydroxide while cooling. After phase separation, the organic phase is washed with 100 ml of water. Separation of the organic phase and evaporation of the solvent in vacuo initially gives an oily residue which crystallizes on standing. Yield: 16.66 g (83% of theory)
  • reaction mixture is cooled to 75 ° C Test ⁇ and diluted with 720 ml of methanol. Thereafter, 2.7 liters of water are added at 68-60 ° C and cooled to 25 ° C. The product is filtered off and washed with 2 liters of water. It is dried in an oven under inerting at 70 0 C.
  • the crude product thus obtained is then stirred in 1 liter of methanol in the boiling heat, filtered hot with 200 ml of methanol and then dried at 70 0 C under inertization.
  • the combined toluene phases are washed twice with 2 liters of 75-80 0 C warm water.
  • the toluene phases are dried with sodium sulfate, filtered and then reduced by distillation in vacuo to a volume of about 430 ml.
  • 1 liter of tert-butyl methyl ether zu ⁇ is then metered and then cooled to 0-5 0 C at 50-55 ° C.
  • the product is isolated by filtration, washed with tert-butyl methyl ether and dried in a drying oven at 60 0 C.

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Abstract

The invention relates to an improved method for producing enantiomer-free 8-(3-amino-piperidin-1-yl)-xanthines.

Description

Verfahren zur Herstellung chiraler 8-(3-Amino-piperidin-1-yl)-xanthine Process for preparing chiral 8- (3-amino-piperidin-1-yl) -xanthines
Die Erfindung betrifft ein verbessertes Verfahren zur Herstellung chiraler 8-(3-Amino- piperidin-1-yl)-xanthine, deren Enantiomere und deren physiologisch verträgliche Salze.The invention relates to an improved process for the preparation of chiral 8- (3-aminopiperidin-1-yl) xanthines, their enantiomers and their physiologically acceptable salts.
8-(3-Amino-piperidin-1-yl)-xanthine der folgenden allgemeinen Struktur8- (3-Amino-piperidin-1-yl) -xanthines of the following general structure
R2 in den R1 beispielsweise eine gegebenenfalls substituierte Arylmethyl- oder eine gegebenenfalls substituierte Heteroarylmethylgruppe, R2 beispielsweise eine Alkyl- gruppe und R3 beispielsweise eine gegebenenfalls substituierte Benzylgruppe oder eine geradkettige oder verzweigte Alkenyl- oder Alkinylgruppe bedeuten, sind bereits aus den internationalen Anmeldungen WO 02/068420, WO 04/018468, WO 04/018467, WO2004/041820 und WO 2004/046148 bekannt, in denen Verbindungen mit wertvollen pharmakologischen Eigenschaften beschrieben werden, zu denen insbesondere eine Hemmwirkung auf die Aktivität des Enzyms Dipeptidylpeptidase- IV (DPP-IV), gehören. Daher sind Verbindungen diese Typs zur Prävention oder Behandlung von Krankheiten oder Zuständen, die in Zusammenhang mit einer erhöhten DPP-IV Aktivität stehen oder die durch Reduktion der DPP-IV Aktivität verhindert oder gemildert werden können, insbesondere von Diabetes mellitus Typ I oder Typ II, Prädiabetes, oder Verminderung der Glukosetoleranz geeignet.R 2 in which R 1 is, for example, an optionally substituted arylmethyl or an optionally substituted heteroarylmethyl group, R 2 is, for example, an alkyl group and R 3 is, for example, an optionally substituted benzyl group or a straight-chain or branched alkenyl or alkynyl group, are already known from international applications WO 02/068420, WO 04/018468, WO 04/018467, WO2004 / 041820 and WO 2004/046148 are known in which compounds with valuable pharmacological properties are described, in particular an inhibitory effect on the activity of the enzyme dipeptidyl peptidase IV (DPP -IV). Therefore, compounds of this type are for the prevention or treatment of diseases or conditions associated with increased DPP-IV activity or which can be prevented or alleviated by reduction of DPP-IV activity, in particular diabetes mellitus type I or type II, Prediabetes, or decreased glucose tolerance.
In der WO 04/018468, wird ein Herstellverfahren offenbart, bei dem 8-(3-Amino- piperidin-1-yl)-xanthine durch Entschützung eines entsprechenden tert.-Butyl- oxycarbonyl-geschützten Derivats der allgemeinen Formel (II) hergestellt werden. WO 04/018468 discloses a preparation process in which 8- (3-aminopiperidin-1-yl) xanthines are prepared by deprotection of a corresponding tert-butyl oxycarbonyl-protected derivative of the general formula (II) ,
Bei diesem Verfahren traten insbesondere im technischen Maßstab schwer abtrenn¬ bare Verunreinigungen auf, welche auf die verwendete Schutzgruppe zurückzu¬ führen sind. Daher war das Verfahren für die technische Herstellung von 8-(3-Amino- piperidin-1-yl)-xanthinen, insbesondere für die Arzneimittelherstellung mit ihren strengen Anforderungen an die Reinheit, nicht geeignet. Des weiteren hatte die Methode den Nachteil, dass die Herstellung des enantiomerenreinen Vorläufers 3- (tert.-Butyloxycarbonylamino)-piperidins aufwendig und teuer ist. Enantiomerenreine Wirkstoffe sind jedoch wegen des Risikos von Nebenwirkungen und zur Reduzierung der Dosis auf ein Minimum für die pharmazeutische Anwendung vorzuziehen. Diese Umstände widersprechen der Eignung des bekannten Verfahrens für die technische Herstellung enantiomerenreiner 8-(3-Amino-piperidin-1-yl)-xanthine.Hardly removable impurities, which are attributable to the protective group used, occurred in this process, particularly on an industrial scale. Therefore, the process was not suitable for the industrial production of 8- (3-aminopiperidin-1-yl) -xanthines, especially for drug manufacture with its stringent purity requirements. Furthermore, the method had the disadvantage that the preparation of the enantiomerically pure precursor 3- (tert-butyloxycarbonylamino) piperidine is complicated and expensive. However, enantiomerically pure drugs are preferable because of the risk of side effects and to reducing the dose to a minimum for pharmaceutical use. These circumstances contradict the suitability of the known process for the technical preparation of enantiomerically pure 8- (3-amino-piperidin-1-yl) -xanthines.
Im Lichte der oben beschriebenen Nachteile des bekannten Herstellverfahrens ist es die Aufgabe der vorliegenden Erfindung, ein Verfahren bereitzustellen, das die Her¬ stellung enantiomerenreiner 8-(3-Amino-piperidin-1-yl)-xanthine unter Verwendung leicht zugänglicher Ausgangsstoffe in hoher chemischer und optischer Reinheit und ohne großen technischen Aufwand erlaubt. Dieses neue Verfahren soll auch für die Synthese im technischen Maßstab und damit für die kommerzielle Anwendung geeignet sein.In light of the above-described disadvantages of the known preparation process, it is the object of the present invention to provide a process which allows the preparation enantiomerically pure 8- (3-amino-piperidin-1-yl) -xanthines using readily available starting materials in high chemical and optical purity and without much technical effort allowed. This new process should also be suitable for synthesis on an industrial scale and thus for commercial application.
Diese Aufgabe wird durch das erfindungsgemäße Verfahren zur Herstellung chiraler 8-(3-Amino-piperidin-1-yl)-xanthine gelöst. Neben der technischen Durchführbarkeit in hohen Ausbeuten sind sehr gute chemische und optische Reinheiten weitere Vor¬ teile des erfindungsgemäßen Syntheseweges. Gemäß des erfindungsgemäßen Verfahrens wird der entsprechende Xanthin- Vorläufer (III) mit enantiomerenreinem oder racemischem 3-(Phthalimido)piperidin in geeigneten Lösungsmitteln beim Temperaturen von 20 bis 1600C; vorzugsweise von 80 bis 1400C gemäß Schema 1 umgesetzt. Als Lösungsmittel können beispiels¬ weise Tetrahydrofuran (THF), Dioxan, N.N-Dimethylformamid (DMF), Dimethyl- acetamid (DMA), N-Methyl-2-pyrrolidon (NMP) oder Dimethylsulfoxid (DMSO) ver¬ wendet werden. Vorzugsweise wird NMP verwendet. Anschließend wird die Phthalyl- schutzgruppe nach an sich bekannten Verfahren abgespalten. Mögliche Abspal¬ tungsmethoden werden z.B. von T.W. Greene in „Protective Groups in Organic Synthesis, Wiley 1981 auf Seite 265 beschrieben (z. B. Hydrazin in Ethanol).This object is achieved by the process according to the invention for preparing chiral 8- (3-amino-piperidin-1-yl) -xanthines. In addition to the technical feasibility in high yields, very good chemical and optical purities are further advantages of the synthesis route according to the invention. According to the method of the invention, the corresponding xanthine precursor (III) with enantiomerically pure or racemic 3- (phthalimido) piperidine in suitable solvents at temperatures of 20 to 160 0 C; preferably from 80 to 140 0 C according to Scheme 1 implemented. Examples of suitable solvents are tetrahydrofuran (THF), dioxane, N, N-dimethylformamide (DMF), dimethylacetamide (DMA), N-methyl-2-pyrrolidone (NMP) or dimethyl sulfoxide (DMSO). Preferably, NMP is used. Subsequently, the phthalyl is deprotected by known methods. Possible cleavage methods are described, for example, by TW Greene in Protective Groups in Organic Synthesis, Wiley 1981 on page 265 (eg hydrazine in ethanol).
(I)(I)
In den obenstehenden Formeln bedeutenIn the above formulas mean
X eine Fluchtgruppe ausgewählt aus der Gruppe der Halogene wie beispielsweise ein Fluor-, Chlor- oder Bromatom oder der Sulfonsäureester wie beispielsweise eine Phenylsulfonyloxy-, p-Toluolsulfonyloxy-, Methylsulfonyloxy- oder Trifluormethyl- sulfonyloxygruppe, R1 eine Phenylcarbonylmethyl-, Benzyl-, Naphthylmethyl-, Pyridinylmethyl-, Pyrimidinylmethyl-, Chinolinylmethyl-, Isochinolinylmethyl-, Chinazolinylmethyl-, Chinoxalinylmethyl-, Naphthyridinylmethyl- oder Phenanthridinylmethyl-Gruppe, in der jeweils der aromatische bzw. heteroaromatische Teil durch R3 mono- oder disubstituiert ist, wobei die Substituenten gleich oder verschieden sein können undX is a leaving group selected from the group of the halogens, for example a fluorine, chlorine or bromine atom, or the sulfonic acid esters, for example a phenylsulfonyloxy, p-toluenesulfonyloxy, methylsulfonyloxy or trifluoromethylsulfonyloxy group, R 1 is a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, quinazolinylmethyl, quinoxalinylmethyl, naphthyridinylmethyl or phenanthridinylmethyl group in which in each case the aromatic or heteroaromatic part is replaced by R 3 mono is - or disubstituted, where the substituents may be the same or different and
R3 ein Wasserstoff-, Fluor-, Chlor- oder Bromatom oder eine Cyan-, Methyl-, Trifluormethyl-, Ethyl-, Phenyl-, Methoxy-, Difluormethoxy-, Trifluormethoxy- oder Ethoxy-Gruppe darstellt, oder zwei Reste Ra, sofern sie an benachbarte Kohlenstoffatome gebunden sind, auch eine -0-CH2-O- oder -0-CH2-CH2-O- Gruppe darstellen können,R 3 represents a hydrogen, fluorine, chlorine or bromine atom or a cyano, methyl, trifluoromethyl, ethyl, phenyl, methoxy, difluoromethoxy, trifluoromethoxy or ethoxy group, or two radicals R a , if bound to adjacent carbon atoms, may also be a -O-CH 2 -O- or -O-CH 2 -CH 2 -O- group,
R2 eine Methyl-, Ethyl-, Propyl-, Isopropyl-, Cyclopropyl- oder Phenyl-Gruppe undR 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and
R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Fluorbenzyl-, 2-Chlor- benzyl-, 2-Brombenzyl-, 2-lodbenzyl-, 2-Methylbenzyl-, 2-(Trifluormethyl)benzyl- oder 2-Cyanbenzyl-Gruppe bedeuten.R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl , 2-iodobenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl or 2-cyanobenzyl group.
Bevorzugt ist das Verfahren für diejenigen Verbindungen, in denenPreferably, the process is for those compounds in which
X ein Chlor- oder Bromatom,X is a chlorine or bromine atom,
R1 eine Phenylcarbonylmethyl-, Benzyl-, Naphthylmethyl-, Pyridinylmethyl-, Pyrimidinylmethyl-, Chinolinylmethyl-, Isochinolinylmethyl-, Chinazolinylmethyl-, Chinoxalinylmethyl- oder Naphthyridinylmethyl-Gruppe, in der jeweils der aromatische bzw. heteroaromatische Teil durch R3 mono- oder disubstituiert ist, wobei die Substituenten gleich oder verschieden sein können undR 1 is a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, quinazolinylmethyl, quinoxalinylmethyl or naphthyridinylmethyl group in which the aromatic or heteroaromatic part in each case is mono- or disubstituted by R 3 is, wherein the substituents may be the same or different and
R3 ein Wasserstoff-, Fluor- oder Chloratom oder eine Cyan-, Methyl-, Ethyl-,R 3 is a hydrogen, fluorine or chlorine atom or a cyano, methyl, ethyl,
Methoxy- oder Ethoxy-Gruppe darstellt,Represents methoxy or ethoxy group,
R2 eine Methyl-, Ethyl-, Propyl-, Isopropyl-, Cyclopropyl- oder Phenyl-Gruppe und R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Fluorbenzyl-,2-Chlor- benzyl-, 2-Brombenzyl-, 2-lodbenzyl-, 2-Methylbenzyl-, 2-(Trifluormethyl)benzyl-, oder 2-Cyanbenzyl-Gruppe bedeuten.R 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl , 2-iodobenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl, or 2-cyanobenzyl group.
Besonders bevorzugt ist das Verfahren für diejenigen Verbindungen, in denenThe process is particularly preferred for those compounds in which
X ein Chlor- oder Bromatom,X is a chlorine or bromine atom,
R1 eine Cyanbenzyl-, (Cyanpyridinyl)methyl-, Chinolinylmethyl-, (Methylchinolinyl)- methyl-, Isochinolinylmethyl-, (Methylisochinolinyl)methyl-, Chinazolinylmethyl-, (Methylchinazolinyl)methyl-, Chinoxazinylmethyl-, (Methylchinoxalinyl)methyl-, (Dimethychinoxalinyl)methyl- oder Naphthyridinylmethyl-Gruppe,R 1 is a cyanobenzyl, (cyanopyridinyl) methyl, quinolinylmethyl, (methylquinolinyl) methyl, isoquinolinylmethyl, (methylisoquinolinyl) methyl, quinazolinylmethyl, (methylquinazolinyl) methyl, quinoxazinylmethyl, (methylquinoxalinyl) methyl, ( Dimethyoxinoxalinyl) methyl or naphthyridinylmethyl group,
R2 eine Methyl-, Cyclopropyl- oder Phenylgruppe undR 2 is a methyl, cyclopropyl or phenyl group and
R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Chlorbenzyl-, 2- Brombenzyl- oder 2-Cyanbenzyl-Gruppe bedeuten,R 3 represents a 2-butene-1-yl, 3-methyl-2-butene-1-yl, 2-butyn-1-yl, 2-chlorobenzyl, 2-bromobenzyl or 2-cyanobenzyl group .
insbesondere jedoch für die Verbindungen 1 -[(4-Methyl-chinazolin-2-yl)methyl]-3- methyl-7-(2-butin-1-yl)-8-(3-(R)-amino-piperidin-1-yl)-xanthin, 1 -[(3-Methyl-iso- chinolin-1 -yl)methyl]-3-methyl-7-(2-butin-1 -yl)-8-((R)-3-amino-piperidin-1 -yl)-xanthin und 1 -[(3-Cyano-pyridin-2-yl)methyl]-3-methyl-7-(2-butin-1 -yl)-8-(3-(R)-amino- piperidin-1-yl)-xanthin, wobei X Brom bedeutet.but especially for the compounds 1 - [(4-methylquinazolin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) -amino-piperidine 1-yl) -xanthine, 1 - [(3-methyl-iso-quinolin-1-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8 - ((R) - 3-amino-piperidin-1-yl) -xanthine and 1 - [(3-cyano-pyridin-2-yl) -methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3 - (R) -amino-piperidin-1-yl) -xanthine, where X is bromine.
Bevorzugt wird jeweils (R)-3-(Phthalimido)piperidin als Reagenz verwendet. Die Herstellung der Verbindungen der Formel (III) ist in der bereits oben zitierten Literatur beschrieben und erfolgt nach an sich bekannten Verfahren.Preferably, each (R) -3- (phthalimido) piperidine is used as the reagent. The preparation of the compounds of the formula (III) is described in the literature already cited above and is carried out by processes known per se.
Ein weiterer Erfindungsgegenstand ist ein Verfahren zur Herstellung von optisch aktivem 3-(Phthalimido)piperidin. Dabei wird 3-Aminopyridin zunächst mittels an sich bekannten Verfahren hydriert. Das so erhaltene racemische 3-Aminopiperidin wird dann mittels Phthalsäureanhydrid in das entsprechende Phthalimid überführt. Aus der Lösung des racemischen, rohen Phthalimids (IV) kann mittels D-Weinsäure selektiv das (R)-Enantiomer ausgefällt werden. Aus der Mutterlauge dieser Salz¬ fällung kann ferner durch Zugabe von L-Weinsäure das (S)-Enantiomer von (IV) auf einfache Weise gewonnen werden, und zwar ohne vorherige Abtrennung des noch in der Mutterlauge enthaltenen Überschusses an D-Weinsäure.Another subject of the invention is a process for the preparation of optically active 3- (phthalimido) piperidine. In this case, 3-aminopyridine is first hydrogenated by means of processes known per se. The resulting racemic 3-aminopiperidine is then converted to the corresponding phthalimide using phthalic anhydride. Out In the solution of the racemic, crude phthalimide (IV), the (R) -enantiomer can be selectively precipitated by means of D-tartaric acid. From the mother liquor of this salt precipitation, the (S) -enantiomer of (IV) can furthermore be obtained in a simple manner by addition of L-tartaric acid, without prior separation of the excess of D-tartaric acid still present in the mother liquor.
Diese extrem einfache Enantiomerentrennung der Verbindung der Formel (IV) ist für den Fachmann überraschend. Die racemische Base aus der Hydrierreaktion muß dazu zuvor nicht aufgereinigt werden. Das Verfahren funktioniert selbst im tech¬ nischen Maßstab problemlos.This extremely simple enantiomer separation of the compound of the formula (IV) is surprising to the person skilled in the art. The racemic base from the hydrogenation reaction does not need to be purified beforehand. The method works problem-free even on a technical scale.
Zudem ist schon die unerwartet saubere Umsetzung von 3-Aminopiperidin mit Phthalsäureanhydrid per se überraschend, da laut Literatur (z.B. US-Patent US 4,005,208, insbesondere Beispiel 27) Gemische zu erwarten sind, die neben dem gewünschten Produkt Derivate, in denen das Ring-Stickstoffatom acyliert ist, ent¬ halten.In addition, even the unexpectedly clean reaction of 3-aminopiperidine with phthalic anhydride per se is surprising, since according to literature (eg US Patent US 4,005,208, especially Example 27) mixtures are to be expected, in addition to the desired product derivatives in which the ring nitrogen atom is acylated, ent.
3 3
ridin-Tartratridin tartrate
Die folgenden Beispiele sollen die Erfindung näher erläutern: Beispiel 1The following examples are intended to explain the invention in more detail: example 1
D-Weinsäuresalz des R-Enantiomers von 3-(Phthalimido)piperidinD-tartaric acid salt of the R-enantiomer of 3- (phthalimido) piperidine
a. Hydrierung:a. hydrogenation:
3-Aminopyιϊdin rac-3-Aminopiperidin3-aminopyιϊdin rac-3-aminopiperidine
10,00 kg (106,25 mol) 3-Aminopyridin, 500 g Aktivkohle techn. und 65 Liter Essig¬ säure werden im Hydrierreaktor vorgelegt. 50 g Nishimura Katalysator (ein kommer¬ ziell erhältlicher Rhodium/Platin Mischkatalysator) werden in 2,5 Liter Essigsäure aufgeschlemmt zugeben und mit 2,5 Liter Essigsäure nachgespült. Es wird bei 5O0C und 100 bar Wasserstoffüberdruck bis zum Stillstand der Wasserstoffaufnahme hydriert und anschließend 30 Minuten bei 5O0C nachhydriert. Der Katalysator und die Aktivkohle werden abfiltriert und mit 10 Liter Essigsäure nachwaschen. Die Produkt¬ lösung wird ohne Reinigung weiter umgesetzt.10.00 kg (106.25 mol) of 3-aminopyridine, 500 g of activated charcoal techn. and 65 liters of acetic acid are placed in the hydrogenation reactor. 50 g of Nishimura catalyst (a commercially available rhodium / platinum mixed catalyst) are added in 2.5 liters of acetic acid and rinsed with 2.5 liters of acetic acid. It is hydrogenated and at 5O 0 C and 100 bar hydrogen pressure until the cessation of hydrogen uptake rehydrogenated then 30 minutes at 5O 0 C. The catalyst and the activated carbon are filtered off and washed with 10 liters of acetic acid. The product solution is reacted further without purification.
Die Reaktion gelingt auch unter weniger drastischen Drücken.The reaction also succeeds under less drastic pressures.
b. Acylierung:b. acylation:
15,74 kg (106,25 mol) Phthalsäureanhydrid werden im Reaktor vorgelegt und mit dem Filtrat aus der Hydrierung versetzt. Es wird mit 7,5 Liter Essigsäure nachgespült, und anschließend wird die Reaktionsmischung zum Rückfluß erhitzt, wobei innerhalb einer Stunde ca. 30% der eingesetzten Essigsäure abdestilliert werden. Die Reak¬ tionslösung wird auf 9O0C abgekühlt. Die Produktlösung wird ohne Reinigung weiter umgesetzt.15.74 kg (106.25 mol) of phthalic anhydride are placed in the reactor and treated with the filtrate from the hydrogenation. It is rinsed with 7.5 liters of acetic acid, and then the reaction mixture is heated to reflux, wherein within About 30% of the acetic acid used are distilled off one hour. The Reak¬ tion solution is cooled to 9O 0 C. The product solution is further reacted without purification.
c. Racematspaltung:c. resolution:
D-(-)-Weinsäure D - (-) - tartaric acid
(R)-3-Phthalimidopiperidin-Tartrat [(R)-(IV)](R) -3-phthalimidopiperidine tartrate [(R) - (IV)]
Eine auf 500C erwärmte Lösung von 11 ,16 kg D-(-)-Weinsäure (74,38 mol) in 50 Liter absolutem Ethanol wird bei 9O0C zur Acylierungsreaktionslösung zudosiert. Es wird mit 10 Liter Ethanol absolut nachgespült und 30 Minuten bei 9O0C nachgerührt, wo¬ bei das Produkt kristallisiert. Nach dem Abkühlen auf 5°C wird das Produkt abzentri- fugiert und mit Ethanol absolut gewaschen. Die Produktlösung wird ohne Reinigung weiter umgesetzt.A heated to 50 0 C solution of 11, 16 kg of D - (-) - tartaric acid (74.38 mol) in 50 liters of absolute ethanol is added at 9O 0 C to the acylation reaction solution. It is completely rinsed with 10 liters of ethanol and stirred for 30 minutes at 9O 0 C, where the product crystallizes. After cooling to 5 ° C, the product is centrifuged off and washed completely with ethanol. The product solution is further reacted without purification.
d. Umkristallisation:d. recrystallization:
Das feuchte Rohprodukt wird in einer Mischung von 50 Liter Aceton und 90 Liter Wasser so lange zum Rückfluß erhitzt, bis eine Lösung entstanden ist. An- schliessend wird auf 5°C abgekühlt, wobei das Produkt auskristallisiert. Die Sus¬ pension wird bei 5°C 30 Minuten nachgerührt, das Produkt wird abzentrifugiert und zuletzt mit einer Mischung aus 20 Liter Aceton und 10 Liter Wasser gewaschen. Es wird im Trockenschrank unter Inertisierung bei 45°C getrocknet. Ausbeuten: 11 ,7 - 12,5 kg (29 - 31 % d. Theorie) Beispiel 2The moist crude product is heated to reflux in a mixture of 50 liters of acetone and 90 liters of water until a solution has formed. The mixture is then cooled to 5 ° C, whereby the product crystallizes out. The Sus¬ pension is stirred at 5 ° C for 30 minutes, the product is removed by centrifugation and washed last with a mixture of 20 liters of acetone and 10 liters of water. It is dried in an oven under inerting at 45 ° C. Yields: 11, 7 - 12.5 kg (29 - 31% of theory) Example 2
Synthese von 1 -[(4-Methyl-chinazolin-2-yl)methyl]-3-methyl-7-(2-butin-1 -yl)-8-(3-(R)- amino-piperidin-1 -yl)-xanthinSynthesis of 1 - [(4-methylquinazolin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) -amino-piperidine-1 - yl) -xanthine
a. 2-Chlormethyl-4-methyl-chinazolina. 2-chloromethyl-4-methyl-quinazoline
NN
10,00 kg (73,98 mol) 2-Aminoacetophenon werden vorgelegt und 24,5 Liter 1 ,4- Dioxan zugegeben. Die auf 100C abgekühlte Lösung wird durch Überleiten mit 16,72 kg (458,68 mol) Chlorwasserstoff versetzt. Die Reaktionsmischung erwärmt sich auf 22 - 25°C. Bei dieser Temperatur wird weiter Chlorwasserstoff überge¬ leitet. Ab etwa der Hälfte der gesamten Überleitungsmenge wird auf -100C abge¬ kühlt und weiter übergeleitet. Anschließend wird die entstandene Suspension bei - 100C über Nacht stehen gelassen. Eine Lösung aus 6,70 kg (88,78 mol) Chloracetonitril in 2,5 Liter 1 ,4-Dioxan wird innerhalb von einer Stunde bei -100C zugegeben. Das Zulaufgefäß wird mit 2 Liter 1 ,4-Dioxan nachgespült. Danach wird der Reaktorinhalt auf 60C erwärmt und ca. 2 Stunden nachgerührt. In einem weiteren Reaktor wird eine Mischung aus 122 Liter Wasser und 62,04 kg (775,31 mol) Natriumhydroxid-Lösung (50 %) vorgelegt und auf 6°C abgekühlt. Das Reaktionsgemisch aus dem ersten Reaktor wird portionsweise zugegeben. Die Innentemperatur beträgt dabei maximal 11 °C. Anschließend wird der erste Reaktor zuerst mit 6 Liter 1 ,4-Dioxan und dann mit 6 Liter Wasser nachgespült. Die entstandene Suspension wird noch 30 Minuten bei 5°C nachgerührt. Das Produkt wird abzentrifugiert, mit 41 Liter Wasser gewaschen und unter Inerti- sierung im Trockenschrank bei 35°C getrocknet. Ausbeute: 10,5 - 12,1 kg (74 - 85 % d. Theorie) b. 1 -r(4-Methyl-chinazolin-2-vπmethyll-3-methyl-7-(2-butin-1 -yl)-8-brom-xanthin10.00 kg (73.98 mol) of 2-aminoacetophenone are initially charged and 24.5 liters of 1,4-dioxane are added. The cooled to 10 0 C solution is added by passing 16.72 kg (458.68 mol) of hydrogen chloride. The reaction mixture warms to 22-25 ° C. At this temperature, further hydrogen chloride is passed over. From about half of the total transfer amount is cooled to -10 0 C and further transferred. Then the resulting suspension at will - 10 0 C overnight. A solution of 6.70 kg (88.78 mol) of chloroacetonitrile in 2.5 liters of 1, 4-dioxane is added within one hour at -10 0C. The feed vessel is rinsed with 2 liters of 1, 4-dioxane. Thereafter, the reactor contents are heated to 6 0 C and stirred for about 2 hours. In a further reactor, a mixture of 122 liters of water and 62.04 kg (775.31 mol) of sodium hydroxide solution (50%) is introduced and cooled to 6 ° C. The reaction mixture from the first reactor is added in portions. The internal temperature is a maximum of 11 ° C. Subsequently, the first reactor is first rinsed with 6 liters of 1, 4-dioxane and then with 6 liters of water. The resulting suspension is stirred for another 30 minutes at 5 ° C. The product is centrifuged off, washed with 41 liters of water and dried under inertization in a drying oven at 35 ° C. Yield: 10.5-12.1 kg (74-85% of theory) b. 1 -r (4-Methyl-quinazolin-2-methyl-3-methyl-7- (2-butyn-1-yl) -8-bromo-xanthine
10,00 kg (33,66 mol) 3-Methyl-7-(2-butin-1-yl)-8-brom-xanthin, 7,13 kg (37,02 mol) 2-Chlormethyl-4-methyl-chinazolin, 3,92 kg (37,02 mol) Natriumcarbonat wasserfrei und 30 Liter N-Methyl-2-pyrrolidon werden im Reaktor vorgelegt. Der Reaktorinhalt wird auf 1400C erhitzt und 2 Stunden bei 1400C gerührt. Nach beendeter Reaktion wird die Reaktionsmischung auf 800C abgekühlt und mit 60 Liter Ethanol 96% sowie anschließend bei 700C mit 55 Liter Wasser verdünnt. Bei 600C werden 4,04 kg (67,32 mol) Essigsäure zudosiert und mit 5 Liter Wasser nachgespült. Die entstandene Suspension wird 30 Minuten bei 60°C gerührt, dann auf 230C abgekühlt und 30 Minuten nachgerührt. Anschließend wird das Produkt abzentrifugiert und zuerst mit einer Mischung von 20 Liter Ethanol 96 % und 20 Liter Wasser, anschließend mit 40 Liter Ethanol 96% und 40 Liter Wasser gewaschen. Es wird im Trockenschrank unter Inertisierung bei 450C getrocknet. Ausbeute: 11 ,6 - 12,6 kg (76 - 83 % d. Theorie)10.00 kg (33.66 mol) of 3-methyl-7- (2-butyn-1-yl) -8-bromo-xanthine, 7.13 kg (37.02 mol) of 2-chloromethyl-4-methyl- quinazoline, 3.92 kg (37.02 mol) of anhydrous sodium carbonate and 30 liters of N-methyl-2-pyrrolidone are introduced into the reactor. The reactor contents are heated to 140 ° C. and stirred at 140 ° C. for 2 hours. After completion of the reaction, the reaction mixture is cooled to 80 0 C and diluted with 60 liters of ethanol 96% and then at 70 0 C with 55 liters of water. At 60 0 C 4.04 kg (67.32 mol) of acetic acid are added and rinsed with 5 liters of water. The resulting suspension is stirred for 30 minutes at 60 ° C, then cooled to 23 0 C and stirred for 30 minutes. The product is then centrifuged off and washed first with a mixture of 20 liters of ethanol 96% and 20 liters of water, then with 40 liters of ethanol 96% and 40 liters of water. It is dried in an oven under inerting at 45 0 C. Yield: 11, 6 - 12.6 kg (76-83% of theory)
c. 1 -[(4-Methyl-chinazolin-2-yl)methyll-3-methyl-7-(2-butin-1 -yl)-8-(3-(f?)-phthalimido- piperidin-1 -vP-xanthinc. 1 - [(4-Methylquinazolin-2-yl) methyl-3-methyl-7- (2-butyn-1-yl) -8- (3- (f) -phthalimido-piperidine-1-vP-] xanthine
10,00 kg (22,06 mol) 1-[(4-Methyl-chinazolin-2-yl)methyl]-3-methyl-7-(2-butin-1-yl)-8- brom-xanthin, 12,59 kg (33,09 mol) 3-(Phthalimido)piperidin D-Tartrat und 17,5 Liter N-Methyl-2-pyrrolidon werden im Reaktor vorgelegt. Der Reaktorinhalt wird auf 1400C erhitzt. Nach Erreichen der Temperatur werden innerhalb von 20 Minuten 11 ,41 kg (88,24 mol) Diisopropylethylamin zudosiert. Das Zulaufgefäß wird mit 2,5 Liter N-Methyl-2-pyrrolidon nachgespült und die Reaktionsmischung anschließend für 2 Stunden bei 1400C gerührt. Nach beendeter Reaktion wird die Reaktionsmischung auf 600C abgekühlt und mit 80 Liter Methanol verdünnt. Die entstandene Suspension wird 30 Minuten bei 5O0C gerührt, dann auf 23°C abgekühlt und 30 Minuten nachge- rührt. Anschließend wird das Produkt abzentrifugiert und 3 mal mit je 20 Liter Methanol gewaschen. Es wird im Trockenschrank unter Inertisierung bei 45°C ge¬ trocknet.10.00 kg (22.06 mol) of 1 - [(4-methylquinazolin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8-bromo-xanthine, 12 , 59 kg (33.09 mol) of 3- (phthalimido) piperidine D-tartrate and 17.5 liters of N-methyl-2-pyrrolidone are placed in the reactor. The reactor contents are heated to 140 0 C. After reaching the temperature, 11.41 kg (88.24 mol) of diisopropylethylamine are metered in within 20 minutes. The feed vessel is 2.5 Liters of N-methyl-2-pyrrolidone rinsed and then the reaction mixture for 2 hours at 140 0 C stirred. After completion of the reaction, the reaction mixture is cooled to 60 0 C and diluted with 80 liters of methanol. The resulting suspension is stirred for 30 minutes at 5O 0 C, then cooled to 23 ° C and stirred for 30 minutes. The product is then centrifuged off and washed 3 times with 20 liters of methanol each time. It is dried in a drying oven under inerting at 45 ° C ge.
Ausbeute: 12,0 - 12,5 kg (90 - 94 % d. Th.)Yield: 12.0 - 12.5 kg (90-94% of theory)
d.1-r(4-Methyl-chinazolin-2-vnmethvn-3-methyl-7-(2-butin-1-yl)-8-(3-(R)-amino- piperidin-1 -yl)-xanthind.1-r (4-Methyl-quinazolin-2-methylmeth-3-methyl-7- (2-butyn-1-yl) -8- (3- (R) -amino-piperidin-1-yl) - xanthine
1800 g (3 mol) 1-[(4-Methyl-chinazolin-2-yl)methyl]-3-methyl-7-(2-butin-1-yl)-8-(3-(R)- phthalimido-piperidin-1-yl)-xanthin werden in 18 Liter Toluol auf 80-850C erhitzt. Anschließend werden bei 75-80°C 1 ,815 Liter (30 mol) Ethanolamin zur Suspension zugeben. Zur Vervollständigung der Reaktion wird 2 Stunden bei 80-850C nachge¬ rührt, wobei die Feststoffe in Lösung gehen. Anschließend werden die Phasen ge¬ trennt. Die Ethanolamin-Phase wird zweimal mit warmem Toluol (je 4 Liter) ge- waschen. Die vereinigten Toluol-Phasen werden zweimal mit je 8 Liter 75-800C warmem Wasser gewaschen. Von der Toluol-Phase werden unter Vakuum 22 Liter Toluol abdestilliert. Zur entstandenen Suspension wird bei 40-500C 4 Liter tert.-Butyl- methylether zudosiert und anschließend auf 0-50C abgekühlt. Das Produkt wird durch Filtration isoliert, mit tert.-Butylmethylether nachgewaschen und trockenge- saugt. Die feuchte Rohsubstanz wird anschließend mit der 5-fachen Menge an absolutem Ethanol zum Rückfluß erhitzt und die heiße Lösung über Aktiv-Kohle klar¬ filtriert. Nach Abkühlen des Filtrates auf 2O0C und Einsetzen der Kristallisation wird mit tert.-Butylmethylether auf das doppelte Volumen verdünnt. Die Suspension wird auf 20C abgekühlt, 2 Stunden nachgerührt, abgesaugt und im Vakuumtrocken- schrank bei 45°C getrocknet.1800 g (3 mol) of 1 - [(4-methylquinazolin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) -phthalimido) piperidin-1-yl) -xanthine in 18 liters of toluene are heated to 80-85 0 C. Then, at 75-80 ° C., 1.185 liters (30 mol) of ethanolamine are added to the suspension. To complete the reaction for 2 hours at 80-85 0 C nachge¬ stirred, the solids go into solution. Subsequently, the phases are separated ge. The ethanolamine phase is washed twice with warm toluene (4 liters each). The combined toluene phases are washed twice with 8 liters of 75-80 0 C warm water. From the toluene phase 22 liters of toluene are distilled off under vacuum. To the resulting suspension 4 liters of tert-butyl methyl ether is added and then cooled to 0-5 0 C at 40-50 0 C. The product is isolated by filtration, washed with tert-butyl methyl ether and sucked dry. The wet crude substance is then heated to reflux with 5 times the amount of absolute ethanol and the hot solution is filtered through activated charcoal clear. After cooling the filtrate to 2O 0 C and onset of crystallization is diluted with tert-butyl methyl ether to twice the volume. The suspension will cooled to 2 0 C, stirred for 2 hours, filtered off with suction and dried in a vacuum oven at 45 ° C.
Ausbeute: 1174 g (83,2% d.Theorie)Yield: 1174 g (83.2% of theory)
Alternatives Verfahren für Schritt d:Alternative method for step d:
1400 g (2,32 mol) 1-[(4-Methyl-chinazolin-2-yl)methyl]-3-methyl-7-(2-butin-1-yl)-8-(3- (R)-phthalimido-piperidin-1-yl)-xanthin werden in 4,9 I Tetrahydrofuran vorgelegt und anschließend auf 55-65°C erhitzt. Anschließend werden 350 ml Wasser sowie 1433 g (2,32 mol) Ethanolamin zur Suspension zugeben. Zur Vervollständigung der Reaktion wird 3 Stunden bei 60-630C nachgerührt.1,400 g (2.32 mol) of 1 - [(4-methylquinazolin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) - phthalimido-piperidin-1-yl) -xanthine are charged in 4.9 l of tetrahydrofuran and then heated to 55-65 ° C. Subsequently, 350 ml of water and 1433 g (2.32 mol) of ethanolamine are added to the suspension. To complete the reaction is stirred at 60-63 0 C for 3 hours.
Anschließend werden 619 ml 45-%ige Natronlauge sowie 3,85 I Wasser zugesetzt und für 30 min bei 55-65°C gerührt. Zum Reaktionsgemisch werden dann 5,6 I Toluol gegeben, 15 min gerührt und an- schließend die Phasen getrennt.Subsequently, 619 ml of 45% sodium hydroxide solution and 3.85 l of water are added and the mixture is stirred at 55-65 ° C. for 30 min. 5.6 L of toluene are then added to the reaction mixture, stirred for 15 minutes, and the phases are subsequently separated.
Die organische Phase wird mit 2,8 I Wasser bei 55-650C gewaschen und an¬ schließend abgetrennt. Von der organischen Phase werden unter Vakuum 4,2 I ab¬ destilliert. Anschließend wird bei 65-75°C 1 ,4 I Methylcyclohexan zugegeben, wobei das Produkt kristallisiert. Die Suspension wird 8-16 h bei 15-25°C gerührt und an- schließend auf 0-5°C abgekühlt. Das Produkt wird durch Filtration isoliert, mit 4,2 I Methylcyclohexan nachgewaschen und trockengesaugt und im Vakuum bei 35°C getrocknet.The organic phase is washed with 2.8 l of water at 55-65 0 C and then closing separated. 4.2 l of the organic phase are distilled off under reduced pressure. Then, at 65-75 ° C., 1, 4 l of methylcyclohexane are added, whereby the product crystallizes. The suspension is stirred for 8-16 h at 15-25 ° C and then cooled to 0-5 ° C. The product is isolated by filtration, washed with 4.2 l of methylcyclohexane and sucked dry and dried in vacuo at 35 ° C.
Die getrocknete Rohsubstanz (991 g) wird anschließend mit der 5-fachen Menge an Methanol zum Rückfluß erhitzt, Aktiv-Kohle zugesetzt und filtriert. Das Filtrat wird durch Abdestillieren von Methanol auf ein Volumen von 1 ,5 I reduziert. Nach Abküh¬ len des Filtrates auf 45-55°C° wird mit tert.-Butylmethylether auf das vierfache Volu¬ men verdünnt. Die Suspension wird auf 0-50C abgekühlt, 2 Stunden nachgerührt, abgesaugt, mit tert.-Butylmethylether nachgewaschen und im Vakuumtrocken- schrank bei 35°C getrocknet.The dried crude substance (991 g) is then heated to reflux with 5 times the amount of methanol, activated charcoal added and filtered. The filtrate is reduced by distilling off methanol to a volume of 1.5 l. After the filtrate has been cooled to 45-55 ° C., it is diluted to four times the volume with tert-butyl methyl ether. The suspension is cooled to 0-5 0 C, stirred for 2 hours, filtered off with suction, washed with tert-butyl methyl ether and dried in a vacuum oven at 35 ° C.
Ausbeute: 899 g ( 81 ,9 % d. Theorie ) Beispiel 3Yield: 899 g (81.9% of theory) Example 3
1 -[(3-Cyano-pyridin-2-yl)methyl]-3-methyl-7-(2-butin-1 -yl)-8-(3-(R)-amino-piperidin-1 - yl)-xanthin1 - [(3-Cyano-pyridin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) -amino-piperidin-1-yl) xanthine
a. 3-Cvano-2-(chlormethyl)-pyridina. 3-Cvano-2- (chloromethyl) pyridine
165,5 g (0,98 mol) 2-Hydroxymethyl-3-pyridincarboxamid werden zusammen mit 270 ml Phosphoroxychlorid für 1 Stunde auf 90-1000C erhitzt. Das Reaktionsgemisch wird auf Raumtemperatur abgekühlt und anschließend in ca. 800 ml 50-600C warmes Wasser eingetropft. Nach Hydrolyse des Phosphoroxychlorids wird unter Kühlung mit Natronlauge neutralisiert, wobei das Produkt ausfällt. Es wird abfiltriert, mit 300 ml Wasser gewaschen und anschließend bei 35-400C getrocknet. Ausbeute: 122,6 g (82% d. Th.)165.5 g (0.98 mol) of 2-hydroxymethyl-3-pyridine carboxamide are heated together with 270 ml of phosphorus oxychloride for 1 hour at 90-100 0 C. The reaction mixture is cooled to room temperature and then added dropwise in about 800 ml of 50-60 0 C warm water. After hydrolysis of the phosphorus oxychloride is neutralized with cooling with sodium hydroxide solution, whereby the product precipitates. It is filtered off, washed with 300 ml of water and then dried at 35-40 0 C. Yield: 122.6 g (82% of theory)
Variante zu Verfahrensschritt a: 3-Cvano-2-(chlormethyl)-pyridin 20,0 g (131 ,45 mmol) 2-Hydroxymethyl-3-pyridincarboxamid werden in 110 ml Acetonitril suspendiert und auf 78°C erwärmt. Innerhalb von 15 Minuten werden 60,65 g (395,52 mmol) Phosphoroxychlorid zudosiert und 2 Stunden auf 81 °C erwärmt. Nach abkühlen auf 22°C wird die Reaktionsmischung in 200 ml 400C warmes Wasser eingerührt. Nach Zugabe von 100 ml Toluol wird unter Kühlung mit Natronlauge neutralisiert. Nach Phasentrennung wird die organische Phase mit 100 ml Wasser gewaschen. Abtrennung der organische Phase und verdampfen des Lösemittels im Vakuum ergibt zunächst einen öligen Rückstand welcher beim Stehen kristallisiert. Ausbeute: 16,66 g (83% d.Th)Variant to process step a: 3-Covano-2- (chloromethyl) -pyridine 20.0 g (131.45 mmol) of 2-hydroxymethyl-3-pyridinecarboxamide are suspended in 110 ml of acetonitrile and heated to 78.degree. Within 15 minutes, 60.65 g (395.52 mmol) of phosphorus oxychloride are metered in and heated to 81 ° C. for 2 hours. After cooling to 22 ° C, the reaction mixture is stirred into 200 ml of 40 0 C warm water. After addition of 100 ml of toluene is neutralized with sodium hydroxide while cooling. After phase separation, the organic phase is washed with 100 ml of water. Separation of the organic phase and evaporation of the solvent in vacuo initially gives an oily residue which crystallizes on standing. Yield: 16.66 g (83% of theory)
b. 1 -r(3-Cvano-pyridin-2-v0methyll-3-methyl-7-(2-butin-1 -vP-8-brom-xanthinb. 1 -r (3-cyanopyridine-2-methylmethyl-3-methyl-7- (2-butyn-1-vP-8-bromo-xanthine
202 g (0,68 mol) 3-Methyl-7-(2-butin-1-yl)-8-brom-xanthin 188,5 g (1 ,36 mol) Kalium- carbonat wasserfrei und 1 ,68 Liter N-Methyl-2-pyrrolidon werden im Reaktor vorge- legt und auf 70°C erwärmt. Anschließend werden 119 g (0,75 mol) 2-Chlormethyl-3- cyano-pyridin in 240 ml N-Methyl-2-pyrrolidin (NMP) zugetropft. Der Reaktorinhalt wird für 19 Stunden bei 700C gerührt. Nach beendeter Reaktion wird der Reaktions¬ mischung 2,8 Liter Wasser zugesetzt und auf 250C abgekühlt. Das Produkt wird abfiltriert, mit 2 Liter Wasser gewaschen und im Trockenschrank unter Inertisierung bei 700C getrocknet. Ausbeute: 257,5 g (91 % d. Th.)202 g (0.68 mol) of 3-methyl-7- (2-butyn-1-yl) -8-bromo-xanthine 188.5 g (1.36 mol) of potassium carbonate anhydrous and 1.68 liters of N- Methyl-2-pyrrolidone are initially charged in the reactor and heated to 70.degree. Subsequently, 119 g (0.75 mol) of 2-chloromethyl-3 cyano-pyridine in 240 ml of N-methyl-2-pyrrolidine (NMP) was added dropwise. The reactor contents are stirred at 70 ° C. for 19 hours. After completion of the reaction the mixture is Reaktions¬ 2.8 liters of water were added and cooled to 25 0 C. The product is filtered off, washed with 2 liters of water and dried in a drying oven under inerting at 70 0 C. Yield: 257.5 g (91% of theory)
c. 1 -r(3-Cvano-pyridin-2-vnmethvπ-3-methyl-7-(2-butin-1 -vn-8-(3-(ff)-phthalimido- piperidin-1 -yl)-xanthinc. 1 -r (3-cyanopyridine-2-vnmethvπ-3-methyl-7- (2-butyn-1-vn-8- (3- (ff) -phthalimidopiperidin-1-yl) -xanthine
230 g (0,557 mol) 1-[(3-Cyano-pyridin-2-yl)methyl]-3-methyl-7-(2-butin-1-yl)-8-brom- xanthin, 318 g (0,835 mol) 3-(Phthalimido)piperidin D-Tartrat und 1 ,15 Liter N-Methyl- 2-pyrrolidon werden im Reaktor vorgelegt. Der Reaktorinhalt wird auf 140°C erhitzt. Nach Erreichen der Temperatur werden innerhalb von 20 Minuten 478 ml (2,78 mol) Diisopropylethylamin zudosiert und die Reaktionsmischung anschließend für 2 Stun¬ den bei 1400C gerührt. Anschließend wird die Reaktionsmischung auf 75°C abge¬ kühlt und mit 720 ml Methanol verdünnt. Danach werden bei 68-60°C 2,7 Liter Wasser zugegeben und auf 25°C abgekühlt. Das Produkt wird abfiltriert und mit 2 Liter Wasser gewaschen. Es wird im Trockenschrank unter Inertisierung bei 700C getrocknet.230 g (0.557 mol) of 1 - [(3-cyano-pyridin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8-bromooxanthine, 318 g (0.835 mol ) 3- (phthalimido) piperidine D-tartrate and 1.15 liters of N-methyl-2-pyrrolidone are placed in the reactor. The reactor contents are heated to 140.degree. After reaching the temperature within 20 minutes 478 ml (2.78 mol) of diisopropylethylamine are added, followed by stirring the reaction mixture for 2 Stun at 140 0 C. Subsequently, the reaction mixture is cooled to 75 ° C abge¬ and diluted with 720 ml of methanol. Thereafter, 2.7 liters of water are added at 68-60 ° C and cooled to 25 ° C. The product is filtered off and washed with 2 liters of water. It is dried in an oven under inerting at 70 0 C.
Das so erhaltene Rohprodukt wird anschließend in 1 Liter Methanol in der Siedehitze verrührt, heiß filtriert mit 200 ml Methanol gewaschen und anschließend bei 700C unter Inertisierung getrocknet.The crude product thus obtained is then stirred in 1 liter of methanol in the boiling heat, filtered hot with 200 ml of methanol and then dried at 70 0 C under inertization.
Ausbeute: 275 g (88 % d. Th.) d. 1-r(3-Cvano-pyridin-2-yl)methyll-3-methyl-7-(2-butin-1-vπ-8-(3-(f?)-amino-pipθridin- 1-yl)-xanthinYield: 275 g (88% of theory) d. 1-r (3-cyanopyridin-2-yl) methyll-3-methyl-7- (2-butyne-1-vπ-8- (3- (f) -amino-piperidin-1-yl) - xanthine
412,5 g (0,733 mol) 1-[(3-Cyano-pyridin-2-yl)methyl]-3-methyl-7-(2-butin-1-yl)-8-(3- (R)-phthalimido-piperidin-1-yl)-xanthin werden in 4125 ml Toluol auf 800C erhitzt. Anschließend werden bei 75-800C 445 ml Ethanolamin (7,33 mol) zur Suspension zugeben. Zur Vervollständigung der Reaktion wird 2 Stunden bei 80-850C nachge¬ rührt, wobei die Feststoffe in Lösung gehen. Anschließend werden die Phasen getrennt. Die Ethanolamin-Phase wird zweimal mit warmen Toluol (je 1 Liter) extrahiert. Die vereinigten Toluol-Phasen werden zweimal mit je 2 Liter 75-800C warmen Wasser gewaschen. Die Toluol-Phasen werden mit Natriumsulfat getrock¬ net, filtriert und anschließend durch Destillation im Vakuum auf ein Volumen von ca. 430 ml reduziert. Anschließend wird bei 50-55°C 1 Liter tert.-Butylmethylether zu¬ dosiert und danach auf 0-50C abgekühlt. Das Produkt wird durch Filtration isoliert, mit tert.-Butylmethylether nachgewaschen und im Trockenschrank bei 600C getrocknet.412.5 g (0.733 mol) of 1 - [(3-cyano-pyridin-2-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8- (3- (R) - phthalimido-piperidin-1-yl) -xanthine are heated in 4125 ml of toluene at 80 0 C. C 445 ml of ethanolamine (7.33 mol) are then added to the suspension at 75-80 0th To complete the reaction for 2 hours at 80-85 0 C nachge¬ stirred, the solids go into solution. Subsequently, the phases are separated. The ethanolamine phase is extracted twice with warm toluene (j e 1 liter ). The combined toluene phases are washed twice with 2 liters of 75-80 0 C warm water. The toluene phases are dried with sodium sulfate, filtered and then reduced by distillation in vacuo to a volume of about 430 ml. 1 liter of tert-butyl methyl ether zu¬ is then metered and then cooled to 0-5 0 C at 50-55 ° C. The product is isolated by filtration, washed with tert-butyl methyl ether and dried in a drying oven at 60 0 C.
Ausbeute: 273 g (86 % d. Theorie) Schmelzpunkt: 188 ± 3 0CYield: 273 g (86% of theory) Melting point: 188 ± 3 ° C.
Analog zu den Beispielen 2 und 3 wird auch 1-[(3-Methyl-isochinolin-1-yl)methyl]-3- methyl-7-(2-butin-1 -yl)-8-((R)-3-amino-piperidin-1 -yl)-xanthin hergestellt. Analogously to Examples 2 and 3, 1 - [(3-methylisoquinolin-1-yl) methyl] -3-methyl-7- (2-butyn-1-yl) -8 - ((R) -3 -amino-piperidin-1-yl) -exanthin.

Claims

Patentansprüche claims
1. Verfahren zur Herstellung einer Verbindung der allgemeinen Formel (I)1. Process for the preparation of a compound of general formula (I)
R2 R 2
oder eines Enantiomers oder Salzes davon,or an enantiomer or salt thereof,
in der R1 eine Phenylcarbonylmethyl-, Benzyl-, Naphthylmethyl-, Pyridinyl- methyl-, Pyrimidinylmethyl-, Chinolinylmethyl-, Isochinolinylmethyl-, China- zolinylmethyl-, Chinoxalinylmethyl-, Naphthyridinylmethyl- oder Phenanthri- dinylmethyl-Gruppe bedeutet, in der jeweils der aromatische bzw. hetero¬ aromatische Teil durch R3 mono- oder disubstituiert ist, wobei die Substi- tuenten gleich oder verschieden sein können undin which R 1 denotes a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, chinaolinylmethyl, quinoxalinylmethyl, naphthyridinylmethyl or phenanthridinylmethyl group, in each of which aromatic or heteroaromatic part is mono- or disubstituted by R 3 , wherein the substituents may be identical or different, and
Ra ein Wasserstoff-, Fluor-, Chlor- oder Bromatom oder eine Cyan-, Methyl-, Trifluormethyl-, Ethyl-, Phenyl-, Methoxy- Difluormethoxy-, Trifluormethoxy- oder Ethoxy-Gruppe darstellt, oder zwei Reste R3, sofern sie an benachbarte Kohlenstoffatome gebunden sind, auch eine -0-CH2-O- oder -0-CH2-CH2-O- Gruppe darstellen können,R a represents a hydrogen, fluorine, chlorine or bromine atom or a cyano, methyl, trifluoromethyl, ethyl, phenyl, methoxy-difluoromethoxy, trifluoromethoxy or ethoxy group, or two radicals R 3 , if when bound to adjacent carbon atoms, may also be a -O-CH 2 -O- or -O-CH 2 -CH 2 -O- group,
R2 eine Methyl-, Ethyl-, Propyl-, Isopropyl-, Cyclopropyl- oder Phenyl-Gruppe undR 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and
R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Fluorbenzyl-, 2- Chlorbenzyl-, 2-Brombenzyl-, 2-lodbenzyl-, 2-Methylbenzyl-, 2-(Trifluormethyl)- benzyl- oder 2-Cyanbenzyl-Gruppe bedeuten,R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl, 2 -lodbenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl or 2-cyanobenzyl group,
umfassend folgende Syntheseschritte: a) Umsetzung einer Verbindung der allgemeinen Formel (III)comprising the following synthesis steps: a) reaction of a compound of the general formula (III)
in der X eine Fluchtgruppe ausgewählt aus der Gruppe der Halogene oder der Sulfonsäureester bedeutet undin which X is a leaving group selected from the group of halogens or sulfonic acid esters and
R1 bis R3 wie oben erwähnt definiert sind, mit 3-(Phthalimido)piperidin oder einem Enantiomer davon,R 1 to R 3 are as defined above, with 3- (phthalimido) piperidine or an enantiomer thereof,
b) Entschützung der so erhaltenen Verbindung der allgemeinen Formel (II)b) Deprotection of the compound of general formula (II) thus obtained
in der R1 bis R3 wie oben erwähnt definiert sind und in which R 1 to R 3 are defined as mentioned above and
c) gegebenenfalls Überführung in ein physiologisch verträgliches Salz.c) optionally conversion into a physiologically acceptable salt.
2. Verfahren gemäß Anspruch 1 , wobei2. The method according to claim 1, wherein
X ein Chlor- oder Bromatom, R1 eine Phenylcarbonylmethyl-, Benzyl-, Naphthylmethyl-, Pyridinylmethyl-, Pyrimidinylmethyl-, Chinolinylmethyl-, Isochinolinylmethyl-, Chinazolinylmethyl-, Chinoxalinylmethyl- oder Naphthyridinylmethyl-Gruppe bedeutet, in der jeweils der aromatische bzw. heteroaromatische Teil durch Ra mono- oder disubstituiert ist, wobei die Substituenten gleich oder verschieden sein können undX is a chlorine or bromine atom, R 1 represents a phenylcarbonylmethyl, benzyl, naphthylmethyl, pyridinylmethyl, pyrimidinylmethyl, quinolinylmethyl, isoquinolinylmethyl, quinazolinylmethyl, quinoxalinylmethyl or naphthyridinylmethyl group in which in each case the aromatic or heteroaromatic part is replaced by R a mono- or is disubstituted, wherein the substituents may be the same or different and
Ra ein Wasserstoff-, Fluor- oder Chloratom oder eine Cyan-, Methyl-, Ethyl-, Methoxy- oder Ethoxy-Gruppe darstellt,R a represents a hydrogen, fluorine or chlorine atom or a cyano, methyl, ethyl, methoxy or ethoxy group,
R2 eine Methyl-, Ethyl-, Propyl-, Isopropyl-, Cyclopropyl- oder Phenyl-Gruppe undR 2 is a methyl, ethyl, propyl, isopropyl, cyclopropyl or phenyl group and
R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Fluorbenzyl-, 2-Chlor- benzyl-, 2-Brombenzyl-, 2-lodbenzyl-, 2-Methyl benzyl-, 2-(Trifluormethyl)benzyl- oder 2-Cyanbenzyl-Gruppe bedeuten.R 3 is a 2-buten-1-yl, 3-methyl-2-buten-1-yl, 2-butyn-1-yl, 2-fluorobenzyl, 2-chlorobenzyl, 2-bromobenzyl , 2-iodobenzyl, 2-methylbenzyl, 2- (trifluoromethyl) benzyl or 2-cyanobenzyl group.
3. Verfahren gemäß Anspruch 2, wobei3. The method according to claim 2, wherein
X ein Chlor- oder Bromatom,X is a chlorine or bromine atom,
R1 eine Cyanbenzyl-, (Cyanpyridinyl)methyl-, Chinolinylmethyl-, (Methylchinolinyl)- methyl-, Isochinolinylmethyl-, (Methylisochinolinyl)methyl-, Chinazolinylmethyl-, (Methylchinazolinyl)methyl-, Chinoxazinylmethyl-, (Methylchinoxalinyl)methyl-, (Dimethychinoxalinyl)methyl- oder Naphthyridinylmethyl-Gruppe,R 1 is a cyanobenzyl, (cyanopyridinyl) methyl, quinolinylmethyl, (methylquinolinyl) methyl, isoquinolinylmethyl, (methylisoquinolinyl) methyl, quinazolinylmethyl, (methylquinazolinyl) methyl, quinoxazinylmethyl, (methylquinoxalinyl) methyl, ( Dimethyoxinoxalinyl) methyl or naphthyridinylmethyl group,
R2 eine Methyl-, Cyclopropyl- oder Phenylgruppe undR 2 is a methyl, cyclopropyl or phenyl group and
R3 eine 2-Buten-1-yl-, 3-Methyl-2-buten-1-yl-, 2-Butin-1-yl-, 2-Chlorbenzyl-, 2- Brombenzyl- oder 2-Cyanbenzyl-Gruppe bedeuten.R 3 represents a 2-butene-1-yl, 3-methyl-2-butene-1-yl, 2-butyn-1-yl, 2-chlorobenzyl, 2-bromobenzyl or 2-cyanobenzyl group ,
4. Verfahren gemäß Anspruch 3, wobei X ein Bromatom,4. The method according to claim 3, wherein X is a bromine atom,
R1 eine (4-Methyl-chinazolin-2-yl)methyl-, (3-Methyl-isochinolin-1-yl)methyl- oder (3- Cyan-pyridin-2-yl)methylgruppe, R2 eine Methylgruppe undR 1 is a (4-methylquinazolin-2-yl) methyl, (3-methylisoquinolin-1-yl) methyl or (3-cyano-pyridin-2-yl) methyl group, R 2 is a methyl group and
R3 eine 2-Butin-1-ylgruppe bedeuten.R 3 is a 2-butyn-1-yl group.
5. Verfahren gemäß einem der Ansprüche 1 bis 4, wobei in Schritt a) (R)-3-(Phthal- imido)piperidin als Reaktionspartner verwendet wird.5. The method according to any one of claims 1 to 4, wherein in step a) (R) -3- (phthalimido) piperidine is used as a reactant.
6. Verfahren zur Herstellung von (R)-3-(Phthalimido)piperidin umfassend folgende Syntheseschritte:6. A process for the preparation of (R) -3- (phthalimido) piperidine comprising the following synthesis steps:
a) Umsetzung von rac-3-Amino-pipehdin in geeigneten Lösungsmitteln mita) reaction of rac-3-amino-pipedin in suitable solvents with
Phthalsäureanhydrid undPhthalic anhydride and
b) Abtrennung des (R)-3-(Phthalimido)piperidins aus einer Lösung des so erhaltenen racemischen 3-(Phthalimido)piperidins mittels Zugabe von D- Weinsäure und Isolierung des ausgefallenen Tartrats.b) separation of the (R) -3- (phthalimido) piperidine from a solution of the racemic 3- (phthalimido) piperidine thus obtained by adding D-tartaric acid and isolating the precipitated tartrate.
7. Verfahren zur Herstellung von (S)-3-(Phthalimido)piperidin umfassend folgende Syntheseschritte:7. A process for the preparation of (S) -3- (phthalimido) piperidine comprising the following synthesis steps:
a) Umsetzung von rac-3-Amino-piperidin in geeigneten Lösungsmitteln mita) reaction of rac-3-amino-piperidine in suitable solvents with
Phthalsäureanhydrid undPhthalic anhydride and
b) Abtrennung des (S)-3-(Phthalimido)piperidins aus einer Lösung des so erhaltenen racemischen 3-(Phthalimido)piperidins mittels Zugabe von L- Weinsäure und Isolierung des ausgefallenen Tartrats.b) separation of the (S) -3- (phthalimido) piperidine from a solution of the resulting racemic 3- (phthalimido) piperidine by adding L-tartaric acid and isolating the precipitated tartrate.
8. Verfahren zur Herstellung von (S)-3-(Phthalimido)piperidin umfassend folgende Syntheseschritte:8. A process for the preparation of (S) -3- (phthalimido) piperidine comprising the following synthesis steps:
a) Umsetzung von rac-3-Amino-piperidin in geeigneten Lösungsmitteln mita) reaction of rac-3-amino-piperidine in suitable solvents with
Phthalsäureanhydrid, b) Abtrennung des (R)-3-(Phthalimido)piperidins aus einer Lösung des so erhaltenen racemischen 3-(Phthalimido)piperidins mittels Zugabe von D- Weinsäure und Isolierung des ausgefallenen Tartrats undphthalic anhydride, b) separating the (R) -3- (phthalimido) piperidine from a solution of the racemic 3- (phthalimido) piperidine thus obtained by adding D-tartaric acid and isolating the precipitated tartrate and
c) Zugabe von L-Weinsäure zu der so erhaltenen Mutterlauge der ersten Salz¬ fällung und Isolierung des ausgefällten (S)-3-(Phthalimido)piperidin-Tartrats.c) addition of L-tartaric acid to the resulting mother liquor of the first salt precipitation and isolation of the precipitated (S) -3- (phthalimido) piperidine tartrate.
9. Verfahren gemäß einem der Ansprüche 6 bis 8, wobei in Schritt b) Ethanol als Lösungsmittel verwendet wird.9. The method according to any one of claims 6 to 8, wherein in step b) ethanol is used as a solvent.
10. (R)-3-(Phthalimido)piperidin.10. (R) -3- (phthalimido) piperidine.
11. (S)-3-(Phthalimido)piperidin.11. (S) -3- (phthalimido) piperidine.
12. Verbindungen der allgemeinen Formel12. Compounds of the general formula
R2 R 2
oder eines Enantiomers davon, in dem R1 bis R3 wie in den Ansprüchen 1 bis 4 definiert sind, erhältlich nach dem Verfahren gemäß einem der Ansprüche 1 bis 5, oder eines ihrer Salze.or an enantiomer thereof, wherein R 1 to R 3 are as defined in claims 1 to 4, obtainable by the process according to any one of claims 1 to 5, or one of their salts.
13. Arzneimittel enthaltend eine Verbindung gemäß Anspruch 12 neben gegebenen¬ falls einem oder mehreren inerten Trägerstoffen und/oder Verdünnungsmitteln.13. A medicament containing a compound according to claim 12 in addition, if appropriate, one or more inert carriers and / or diluents.
14. Verwendung einer Verbindung gemäß Anspruch 12 zur Herstellung eines Arzneimittels, das zur Behandlung von Diabetes mellitus Typ I und Typ II, Prädiabetes oder Verminderung der Glukosetoleranz, Arthritis, Adipositas, Allograft Transplantation und durch Calcitonin verursachte Osteoporose geeignet ist. 14. Use of a compound according to claim 12 for the manufacture of a medicament suitable for the treatment of diabetes mellitus type I and type II, prediabetes or diminution of glucose tolerance, arthritis, obesity, allograft transplantation and calcitonin-induced osteoporosis.
EP05804601A 2004-11-05 2005-11-02 Method for producing chiral 8-(3-amino-piperidin-1-yl)-xanthines Withdrawn EP1812438A1 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DK10181043.0T DK2287164T5 (en) 2004-11-05 2005-11-02 Process for the preparation of chiral 8- (3-aminopiperidin-1-yl) xanthines
EP15200579.9A EP3029040B1 (en) 2004-11-05 2005-11-02 Method for producing chiral 8-(3-amino-piperidin-1-yl) -xanthines
PL15200579T PL3029040T3 (en) 2004-11-05 2005-11-02 Method for producing chiral 8-(3-amino-piperidin-1-yl) -xanthines
PL10181043T PL2287164T3 (en) 2004-11-05 2005-11-02 Process for the manufacture of chiral 8-(3-aminopiperidin-1-yl)-xanthines
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