CH608007A5 - Process for the preparation of novel benzylpyrimidines or their salts - Google Patents
Process for the preparation of novel benzylpyrimidines or their saltsInfo
- Publication number
- CH608007A5 CH608007A5 CH1434776A CH1434776A CH608007A5 CH 608007 A5 CH608007 A5 CH 608007A5 CH 1434776 A CH1434776 A CH 1434776A CH 1434776 A CH1434776 A CH 1434776A CH 608007 A5 CH608007 A5 CH 608007A5
- Authority
- CH
- Switzerland
- Prior art keywords
- acid
- formula
- compound
- salts
- compounds
- Prior art date
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 19
- OOLOAWZLPBDRJQ-UHFFFAOYSA-N 2-benzylpyrimidine Chemical class N=1C=CC=NC=1CC1=CC=CC=C1 OOLOAWZLPBDRJQ-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 238000000034 method Methods 0.000 title claims description 7
- 238000002360 preparation method Methods 0.000 title claims description 5
- 150000001875 compounds Chemical class 0.000 claims abstract description 30
- PXIPVTKHYLBLMZ-UHFFFAOYSA-N Sodium azide Chemical compound [Na+].[N-]=[N+]=[N-] PXIPVTKHYLBLMZ-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000003456 sulfonamides Chemical class 0.000 claims abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 7
- 108010022394 Threonine synthase Proteins 0.000 claims abstract description 3
- 230000001580 bacterial effect Effects 0.000 claims abstract description 3
- 150000001989 diazonium salts Chemical class 0.000 claims abstract description 3
- 102000004419 dihydrofolate reductase Human genes 0.000 claims abstract description 3
- 230000003389 potentiating effect Effects 0.000 claims abstract description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 12
- 229960005404 sulfamethoxazole Drugs 0.000 claims description 8
- 229940124530 sulfonamide Drugs 0.000 claims description 8
- JLKIGFTWXXRPMT-UHFFFAOYSA-N sulphamethoxazole Chemical compound O1C(C)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 JLKIGFTWXXRPMT-UHFFFAOYSA-N 0.000 claims description 8
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 6
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 claims description 4
- AFVFQIVMOAPDHO-UHFFFAOYSA-N Methanesulfonic acid Chemical compound CS(O)(=O)=O AFVFQIVMOAPDHO-UHFFFAOYSA-N 0.000 claims description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 239000002253 acid Substances 0.000 claims description 4
- OVBPIULPVIDEAO-LBPRGKRZSA-N folic acid Chemical compound C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)N[C@@H](CCC(O)=O)C(O)=O)C=C1 OVBPIULPVIDEAO-LBPRGKRZSA-N 0.000 claims description 4
- JVTAAEKCZFNVCJ-UHFFFAOYSA-N lactic acid Chemical compound CC(O)C(O)=O JVTAAEKCZFNVCJ-UHFFFAOYSA-N 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 claims description 4
- -1 methoxy, ethoxy, propoxy Chemical group 0.000 claims description 4
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 claims description 4
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 claims description 4
- PHVFBKUGKMUBEY-UHFFFAOYSA-N 5-[(4-azido-3,5-dimethoxyphenyl)methyl]pyrimidine-2,4-diamine Chemical compound COC1=C(N=[N+]=[N-])C(OC)=CC(CC=2C(=NC(N)=NC=2)N)=C1 PHVFBKUGKMUBEY-UHFFFAOYSA-N 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- AMFSJVJTVJYFBE-UHFFFAOYSA-N 2-amino-n-(4,5-dimethyl-1,2-oxazol-3-yl)benzenesulfonamide Chemical compound CC1=C(C)ON=C1NS(=O)(=O)C1=CC=CC=C1N AMFSJVJTVJYFBE-UHFFFAOYSA-N 0.000 claims description 2
- AZVRQGHQVPBIHL-UHFFFAOYSA-N 2-amino-n-(4,5-dimethylpyrimidin-2-yl)benzenesulfonamide Chemical compound N1=C(C)C(C)=CN=C1NS(=O)(=O)C1=CC=CC=C1N AZVRQGHQVPBIHL-UHFFFAOYSA-N 0.000 claims description 2
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 claims description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 claims description 2
- WFBZIFZFHLQCPP-UHFFFAOYSA-N 5-[(4-amino-3,5-dimethoxyphenyl)methyl]pyrimidine-2,4-diamine Chemical compound COC1=C(N)C(OC)=CC(CC=2C(=NC(N)=NC=2)N)=C1 WFBZIFZFHLQCPP-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 claims description 2
- 102000004190 Enzymes Human genes 0.000 claims description 2
- 108090000790 Enzymes Proteins 0.000 claims description 2
- OVBPIULPVIDEAO-UHFFFAOYSA-N N-Pteroyl-L-glutaminsaeure Natural products C=1N=C2NC(N)=NC(=O)C2=NC=1CNC1=CC=C(C(=O)NC(CCC(O)=O)C(O)=O)C=C1 OVBPIULPVIDEAO-UHFFFAOYSA-N 0.000 claims description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 claims description 2
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 claims description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 claims description 2
- KDYFGRWQOYBRFD-UHFFFAOYSA-N Succinic acid Natural products OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 2
- WMPXPUYPYQKQCX-UHFFFAOYSA-N Sulfamonomethoxine Chemical compound C1=NC(OC)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 WMPXPUYPYQKQCX-UHFFFAOYSA-N 0.000 claims description 2
- NHUHCSRWZMLRLA-UHFFFAOYSA-N Sulfisoxazole Chemical compound CC1=NOC(NS(=O)(=O)C=2C=CC(N)=CC=2)=C1C NHUHCSRWZMLRLA-UHFFFAOYSA-N 0.000 claims description 2
- PJSFRIWCGOHTNF-UHFFFAOYSA-N Sulphormetoxin Chemical compound COC1=NC=NC(NS(=O)(=O)C=2C=CC(N)=CC=2)=C1OC PJSFRIWCGOHTNF-UHFFFAOYSA-N 0.000 claims description 2
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 claims description 2
- 235000011054 acetic acid Nutrition 0.000 claims description 2
- 125000003342 alkenyl group Chemical group 0.000 claims description 2
- 125000003302 alkenyloxy group Chemical group 0.000 claims description 2
- 125000003545 alkoxy group Chemical group 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- 125000005336 allyloxy group Chemical group 0.000 claims description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- KDYFGRWQOYBRFD-NUQCWPJISA-N butanedioic acid Chemical compound O[14C](=O)CC[14C](O)=O KDYFGRWQOYBRFD-NUQCWPJISA-N 0.000 claims description 2
- 125000004432 carbon atom Chemical group C* 0.000 claims description 2
- 235000015165 citric acid Nutrition 0.000 claims description 2
- 239000012954 diazonium Substances 0.000 claims description 2
- 238000006193 diazotization reaction Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 2
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 claims description 2
- 229960000304 folic acid Drugs 0.000 claims description 2
- 235000019152 folic acid Nutrition 0.000 claims description 2
- 239000011724 folic acid Substances 0.000 claims description 2
- 235000019253 formic acid Nutrition 0.000 claims description 2
- 239000001530 fumaric acid Substances 0.000 claims description 2
- 239000003112 inhibitor Substances 0.000 claims description 2
- 238000002955 isolation Methods 0.000 claims description 2
- 125000003253 isopropoxy group Chemical group [H]C([H])([H])C([H])(O*)C([H])([H])[H] 0.000 claims description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 claims description 2
- 239000004310 lactic acid Substances 0.000 claims description 2
- 235000014655 lactic acid Nutrition 0.000 claims description 2
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 claims description 2
- 239000011976 maleic acid Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 229940098779 methanesulfonic acid Drugs 0.000 claims description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 2
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 150000007522 mineralic acids Chemical class 0.000 claims description 2
- 150000007524 organic acids Chemical class 0.000 claims description 2
- 235000005985 organic acids Nutrition 0.000 claims description 2
- 238000007911 parenteral administration Methods 0.000 claims description 2
- 239000000825 pharmaceutical preparation Substances 0.000 claims description 2
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 150000003195 pteridines Chemical class 0.000 claims description 2
- DRGCXLJWMQGVJA-UHFFFAOYSA-N pyrimidine;dihydrochloride Chemical compound Cl.Cl.C1=CN=CN=C1 DRGCXLJWMQGVJA-UHFFFAOYSA-N 0.000 claims description 2
- 239000002904 solvent Substances 0.000 claims description 2
- SEEPANYCNGTZFQ-UHFFFAOYSA-N sulfadiazine Chemical compound C1=CC(N)=CC=C1S(=O)(=O)NC1=NC=CC=N1 SEEPANYCNGTZFQ-UHFFFAOYSA-N 0.000 claims description 2
- 229960004306 sulfadiazine Drugs 0.000 claims description 2
- ZZORFUFYDOWNEF-UHFFFAOYSA-N sulfadimethoxine Chemical compound COC1=NC(OC)=CC(NS(=O)(=O)C=2C=CC(N)=CC=2)=N1 ZZORFUFYDOWNEF-UHFFFAOYSA-N 0.000 claims description 2
- 229960000973 sulfadimethoxine Drugs 0.000 claims description 2
- 229960000654 sulfafurazole Drugs 0.000 claims description 2
- 229950003874 sulfamonomethoxine Drugs 0.000 claims description 2
- 230000002195 synergetic effect Effects 0.000 claims description 2
- 239000006188 syrup Substances 0.000 claims description 2
- 235000020357 syrup Nutrition 0.000 claims description 2
- 239000011975 tartaric acid Substances 0.000 claims description 2
- 235000002906 tartaric acid Nutrition 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 125000006273 (C1-C3) alkyl group Chemical group 0.000 abstract 1
- 125000006274 (C1-C3)alkoxy group Chemical group 0.000 abstract 1
- 125000006592 (C2-C3) alkenyl group Chemical group 0.000 abstract 1
- LTMKQNARYXUQPY-UHFFFAOYSA-N 4-(pyrimidin-2-ylmethyl)aniline Chemical class C1=CC(N)=CC=C1CC1=NC=CC=N1 LTMKQNARYXUQPY-UHFFFAOYSA-N 0.000 abstract 1
- 125000000852 azido group Chemical group *N=[N+]=[N-] 0.000 abstract 1
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical compound [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 1
- 235000010288 sodium nitrite Nutrition 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
- C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
- C07D239/24—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members
- C07D239/28—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having three or more double bonds between ring members or between ring members and non-ring members with hetero atoms or with carbon atoms having three bonds to hetero atoms with at the most one bond to halogen, directly attached to ring carbon atoms
- C07D239/46—Two or more oxygen, sulphur or nitrogen atoms
- C07D239/48—Two nitrogen atoms
- C07D239/49—Two nitrogen atoms with an aralkyl radical, or substituted aralkyl radical, attached in position 5, e.g. trimethoprim
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
Abstract
The antibacterially active benzylpyrimidines of the formula adjacent <IMAGE> in which R<1> and R<2> independently of one another denote C1-3-alkyl, C1-3-alkoxy, C2-3-alkenyl or C2-3-alkenyloxy and Z denotes the azido group -N3, and salts of these benzylpyrimidines inhibit bacterial dihydrofolate reductase and potentiate the antibacterial action of sulphonamides. The said compounds are obtained by diazotising corresponding p-aminobenzylpyrimidines and reacting the diazonium compounds thus obtained with sodium azide. If desired, the active compounds formed in this way can then be converted into salts.
Description
**WARNUNG** Anfang DESC Feld konnte Ende CLMS uberlappen **.
PATENTANSPROCHE 1. Verfahren zur Herstellung von Verbindungen der Formel
EMI1.1
in der Rl und R2 unabhängig voneinander Cl-3-Alkyl, Cl-3 Alkoxy, C-3-Alkenyl oder C3-3-Alkenyloxy und Z -N3 bedeuten, bzw. von deren Salzen, dadurch gekennzeichnet, dass man eine Verbindung der Formel
EMI1.2
in der Rl und R2 die oben genannten Bedeutungen haben, diazotiert und danach mit NaN3 umsetzt und eine so erhaltene Verbindung der Formel I gegebenenfalls in ein Salz überführt.
2. Verfahren gemäss Patentanspruch 1, dadurch gekennzeichnet, dass man 2,4-Diamino-5-(4-amino-3,5-dimethoxybenzyl)-pyrimidin in 2,4-Diamino-5-(4-azido-3,5-dimethoxybenzyl)-pyrimidin überführt.
Die Erfindung betrifft ein Verfahren zur Herstellung von neuen Benzylpyrimidinen der Formel
EMI1.3
in der R1 und R2 unabhängig voneinander Cl-3-Alkyl, Cl-3 Alkoxy, C-3-Alkenyl oder C2-3-Alkenyloxy und Z -N3 bedeuten, bzw. von deren Salzen.
Die hier verwendeten Ausdrücke Ct-s und C2-3 bezeich- nen Gruppen mit 1-3 bzw. 2-3 Kohlenstoffatomen. Alkyl-, Alkoxy-, Alkenyl- und Alkenyloxygruppen können geradkettig oder verzweigt sein. Beispiele solcher Gruppen sind Methyl, Äthyl, Propyl, Isopropyl, Methoxy, Äthoxy, Propoxy und Isopropoxy; Vinyl, Allyl, Vinyloxy und Allyloxy.
Bevorzugte Verbindungen der Formel I sind diejenigen, in denen Rl und R2 Ci.s-Alkozy, insbesondere Methoxy oder Äthoxy darstellen.
Die Verbindungen der Formel I bzw. ihre Salze werden erfindungsgemäss dadurch erhalten, dass man eine Verbindung der Formel
EMI1.4
in der R1 und R2 die oben genannten Bedeutungen haben, diazotiert und danach mit NaN3 umsetzt und eine so erhaltene Verbindung der Formel I gegebenenfalls in ein Salz überführt.
Die Diazotierung kann in an sich bekannter Weise mittels salpetriger Säure bzw. Nitrit und Säure erreicht werden. Als Lösungsmittel kommt für diese Reaktion wässrige Salzsäure in Betracht. Das so erhaltene Diazoniumsalz wird in zweiter Stufe, zweckmässig ohne weitere Isolierung, mit Natriumazid umgesetzt.
Für die Herstellung von Säureadditionssalzen, insbesondere von in pharmazeutischen Präparaten brauchbaren Salzen, kommen die üblicherweise für diesen Zweck verwendeten anorganischen Säuren, wie Salzsäure, Schwefelsäure, Phosphorsäure, etc. oder organischen Säuren, wie Ameisensäure, Essigsäure, Bernsteinsäure, Milchsäure, Citronensäure, Maleinsäure, Fumarsäure, Weinsäure, Methansulfonsäure, p Toluolsulfonsäure etc. in Betracht.
Die Verbindungen der Formel I und ihre Salze sind antibakteriell wirksam. Sie hemmen die bakterielle Dihydrofolat Reduktase und potenzieren die antibakterielle Wirkung von Sulfonamiden, wie z.B. Sulfisoxazol, Sulfadimethoxin, Sulfamethoxazol, 4-Sulfanilamido-5,6-dimethoxy-pyrimidin, 2 Sulfanilamido-4,5-dimethyl-pyrimidin oder Sulfachinoxalin, Sulfadiazin, Sulfamonomethoxin, 2-Sulfanilamido-4,5-dimethyl-isoxazol und anderen Inhibitoren für Enzyme, die an der Folsäurebiosynthese beteiligt sind, wie z.B. Pteridinderivate.
Für solche Kombinationen einer oder mehrerer der erfindungsgemässen Verbindungen I mit Sulfonamiden kommt in der Humanmedizin orale, rectale und parenterale Applikation in Frage. Das Verhältnis von Verbindung I zu Sulfonamid kann innerhalb eines weiten Bereiches variieren; es beträgt z.B. zwischen 1:40 (Gewichtsteile) und 5:1 (Gewichtsteile); bevorzugte Verhältnisse sind 1:1 bis 1:5.
So kann z.B. eine Tablette 80 mg einer erfindungsgemässen Verbindung I und 400 mg Sulfamethoxazol, eine Kindertablette 20 mg einer erfindungsgemässen Verbindung I und 100 mg Sulfamethoxazol; Sirup (pro 5 ml) 40 mg Verbindung I und 200 xg Sulfamethoxazol enthalten.
Die Verbindungen der Formel I zeichnen sich durch eine hohe antibakterielle Wirksamkeit bzw. einen ausgeprägten synergistischen Effekt in Kombination mit Sulfonamiden und gute Verträglichkeit aus.
Das nachstehende Beispiel erläutert die Erfindung. Die Temperaturen sind in Celsiusgraden angegeben.
Beispiel
Eine Lösung von 7 g 2,4-Diamino-5-(4-amino-3,5-dimethoxbenzyl)pyrimidin-dihydrochlorid in 60 ml 1 N Salzsäure und 40 ml Wasser wurde unter Rühren und Eiskühlung im Laufe von 5 Min. mit einer Lösung von 1,52 g Natriumnitrit in 10 ml Wasser versetzt. Nach 30 Min. Rühren bei 0 wurde eine Lösung von 1,43 g Natriumazid in 20 ml Wasser hinzugegeben. Die Lösung wurde 2 Std. bei 0o gerührt und darauf bis zur alkalischen Reaktion mit Soda versetzt. Nach 1 Std. Rühren bei 0o wurde das ausgefallene 2,4-Diamino-5-(4-azido-3,5- dimethoxybenzyl)-pyrimidin abgesaugt, mit Wasser gewaschen und aus Methanol umkristallisiert. Smp. 152 (Zers.).
** WARNING ** Beginning of DESC field could overlap end of CLMS **.
PATENT CLAIMS 1. Process for the preparation of compounds of the formula
EMI1.1
in which Rl and R2, independently of one another, are Cl-3-alkyl, Cl-3-alkoxy, C-3-alkenyl or C3-3-alkenyloxy and Z -N3, or of their salts, characterized in that a compound of the formula
EMI1.2
in which R1 and R2 have the meanings given above, are diazotized and then reacted with NaN3 and a compound of the formula I thus obtained is optionally converted into a salt.
2. The method according to claim 1, characterized in that 2,4-diamino-5- (4-amino-3,5-dimethoxybenzyl) pyrimidine is converted into 2,4-diamino-5- (4-azido-3,5 -dimethoxybenzyl) -pyrimidine transferred.
The invention relates to a process for the preparation of new benzylpyrimidines of the formula
EMI1.3
in which R1 and R2 independently of one another are Cl-3-alkyl, Cl-3-alkoxy, C-3-alkenyl or C2-3-alkenyloxy and Z -N3, or of their salts.
The terms Ct-s and C2-3 used here denote groups with 1-3 and 2-3 carbon atoms, respectively. Alkyl, alkoxy, alkenyl and alkenyloxy groups can be straight-chain or branched. Examples of such groups are methyl, ethyl, propyl, isopropyl, methoxy, ethoxy, propoxy and isopropoxy; Vinyl, allyl, vinyloxy and allyloxy.
Preferred compounds of the formula I are those in which R1 and R2 are Ci.s-Alkozy, in particular methoxy or ethoxy.
The compounds of the formula I or their salts are obtained according to the invention by a compound of the formula
EMI1.4
in which R1 and R2 have the meanings given above, are diazotized and then reacted with NaN3 and a compound of the formula I thus obtained is optionally converted into a salt.
The diazotization can be achieved in a manner known per se by means of nitrous acid or nitrite and acid. Aqueous hydrochloric acid can be used as the solvent for this reaction. The diazonium salt thus obtained is reacted with sodium azide in the second stage, expediently without further isolation.
For the production of acid addition salts, especially salts that can be used in pharmaceutical preparations, the inorganic acids usually used for this purpose, such as hydrochloric acid, sulfuric acid, phosphoric acid, etc. or organic acids, such as formic acid, acetic acid, succinic acid, lactic acid, citric acid, maleic acid, Fumaric acid, tartaric acid, methanesulfonic acid, p-toluenesulfonic acid, etc. into consideration.
The compounds of the formula I and their salts have an antibacterial effect. They inhibit the bacterial dihydrofolate reductase and potentiate the antibacterial effect of sulfonamides, such as Sulfisoxazole, sulfadimethoxine, sulfamethoxazole, 4-sulfanilamido-5,6-dimethoxy-pyrimidine, 2-sulfanilamido-4,5-dimethyl-pyrimidine or sulfachinoxaline, sulfadiazine, sulfamonomethoxine, 2-sulfanilamido-4,5-dimethyl-isoxazole and other inhibitors for Enzymes that are involved in folic acid biosynthesis, such as Pteridine derivatives.
For such combinations of one or more of the compounds I according to the invention with sulfonamides, oral, rectal and parenteral administration is possible in human medicine. The ratio of compound I to sulfonamide can vary within a wide range; it is e.g. between 1:40 (parts by weight) and 5: 1 (parts by weight); preferred ratios are 1: 1 to 1: 5.
E.g. a tablet 80 mg of a compound I according to the invention and 400 mg sulfamethoxazole, a children's tablet 20 mg of a compound I according to the invention and 100 mg sulfamethoxazole; Syrup (per 5 ml) contain 40 mg of compound I and 200 xg of sulfamethoxazole.
The compounds of the formula I are distinguished by a high antibacterial activity or a pronounced synergistic effect in combination with sulfonamides and good tolerability.
The following example illustrates the invention. The temperatures are given in degrees Celsius.
example
A solution of 7 g of 2,4-diamino-5- (4-amino-3,5-dimethoxbenzyl) pyrimidine dihydrochloride in 60 ml of 1N hydrochloric acid and 40 ml of water was stirred and ice-cooled over the course of 5 minutes with a Solution of 1.52 g of sodium nitrite in 10 ml of water are added. After stirring at 0 for 30 minutes, a solution of 1.43 g of sodium azide in 20 ml of water was added. The solution was stirred for 2 hours at 0 ° and then soda was added until an alkaline reaction was achieved. After stirring at 0 ° for 1 hour, the precipitated 2,4-diamino-5- (4-azido-3,5-dimethoxybenzyl) pyrimidine was filtered off with suction, washed with water and recrystallized from methanol. M.p. 152 (dec.).
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1434776A CH608007A5 (en) | 1974-07-24 | 1974-07-24 | Process for the preparation of novel benzylpyrimidines or their salts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH1434776A CH608007A5 (en) | 1974-07-24 | 1974-07-24 | Process for the preparation of novel benzylpyrimidines or their salts |
Publications (1)
Publication Number | Publication Date |
---|---|
CH608007A5 true CH608007A5 (en) | 1978-12-15 |
Family
ID=4400055
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1434776A CH608007A5 (en) | 1974-07-24 | 1974-07-24 | Process for the preparation of novel benzylpyrimidines or their salts |
Country Status (1)
Country | Link |
---|---|
CH (1) | CH608007A5 (en) |
-
1974
- 1974-07-24 CH CH1434776A patent/CH608007A5/en not_active IP Right Cessation
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUE | Assignment |
Owner name: F. HOFFMANN-LA ROCHE AG |
|
PL | Patent ceased | ||
PL | Patent ceased |