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IT1110885B - Procedimento per la preparazione di derivati dello acido ftalazin-4-ilacetico e prodotto ottenuto - Google Patents

Procedimento per la preparazione di derivati dello acido ftalazin-4-ilacetico e prodotto ottenuto

Info

Publication number
IT1110885B
IT1110885B IT52480/78A IT5248078A IT1110885B IT 1110885 B IT1110885 B IT 1110885B IT 52480/78 A IT52480/78 A IT 52480/78A IT 5248078 A IT5248078 A IT 5248078A IT 1110885 B IT1110885 B IT 1110885B
Authority
IT
Italy
Prior art keywords
ftalazin
procedure
preparation
product obtained
acid derivatives
Prior art date
Application number
IT52480/78A
Other languages
English (en)
Other versions
IT7852480A0 (it
Original Assignee
Ici Ltd
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 Ici Ltd filed Critical Ici Ltd
Publication of IT7852480A0 publication Critical patent/IT7852480A0/it
Application granted granted Critical
Publication of IT1110885B publication Critical patent/IT1110885B/it

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D491/00Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00
    • C07D491/02Heterocyclic compounds containing in the condensed ring system both one or more rings having oxygen atoms as the only ring hetero atoms and one or more rings having nitrogen atoms as the only ring hetero atoms, not provided for by groups C07D451/00 - C07D459/00, C07D463/00, C07D477/00 or C07D489/00 in which the condensed system contains two hetero rings
    • C07D491/04Ortho-condensed systems
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P29/00Non-central analgesic, antipyretic or antiinflammatory agents, e.g. antirheumatic agents; Non-steroidal antiinflammatory drugs [NSAID]
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P3/00Drugs for disorders of the metabolism
    • A61P3/08Drugs for disorders of the metabolism for glucose homeostasis
    • A61P3/10Drugs for disorders of the metabolism for glucose homeostasis for hyperglycaemia, e.g. antidiabetics
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P43/00Drugs for specific purposes, not provided for in groups A61P1/00-A61P41/00
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D237/00Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
    • C07D237/26Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
    • C07D237/30Phthalazines
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D237/00Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
    • C07D237/26Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
    • C07D237/30Phthalazines
    • C07D237/32Phthalazines with oxygen atoms directly attached to carbon atoms of the nitrogen-containing ring
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/87Benzo [c] furans; Hydrogenated benzo [c] furans
    • C07D307/88Benzo [c] furans; Hydrogenated benzo [c] furans with one oxygen atom directly attached in position 1 or 3
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D493/00Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system
    • C07D493/02Heterocyclic compounds containing oxygen atoms as the only ring hetero atoms in the condensed system in which the condensed system contains two hetero rings
    • C07D493/04Ortho-condensed systems

Landscapes

  • Organic Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Diabetes (AREA)
  • General Health & Medical Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Medicinal Chemistry (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pharmacology & Pharmacy (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Chemical & Material Sciences (AREA)
  • Public Health (AREA)
  • Bioinformatics & Cheminformatics (AREA)
  • Engineering & Computer Science (AREA)
  • Emergency Medicine (AREA)
  • Endocrinology (AREA)
  • Hematology (AREA)
  • Obesity (AREA)
  • Pain & Pain Management (AREA)
  • Rheumatology (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
IT52480/78A 1977-12-29 1978-12-28 Procedimento per la preparazione di derivati dello acido ftalazin-4-ilacetico e prodotto ottenuto IT1110885B (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB5414277 1977-12-29

Publications (2)

Publication Number Publication Date
IT7852480A0 IT7852480A0 (it) 1978-12-28
IT1110885B true IT1110885B (it) 1986-01-06

Family

ID=10470067

Family Applications (1)

Application Number Title Priority Date Filing Date
IT52480/78A IT1110885B (it) 1977-12-29 1978-12-28 Procedimento per la preparazione di derivati dello acido ftalazin-4-ilacetico e prodotto ottenuto

Country Status (31)

Country Link
US (2) US4251528A (it)
EP (1) EP0002895B1 (it)
JP (2) JPS5495582A (it)
AT (1) AT365581B (it)
AU (1) AU516264B2 (it)
BG (1) BG34336A3 (it)
CA (1) CA1107732A (it)
CS (1) CS241015B2 (it)
CY (1) CY1219A (it)
DD (1) DD141021A5 (it)
DE (1) DE2861170D1 (it)
DK (1) DK151253C (it)
ES (1) ES476496A1 (it)
FI (1) FI64357C (it)
GR (1) GR65303B (it)
HK (1) HK22484A (it)
HU (1) HU182585B (it)
IE (1) IE47592B1 (it)
IL (1) IL56099A0 (it)
IN (1) IN150196B (it)
IT (1) IT1110885B (it)
MY (1) MY8500359A (it)
NO (1) NO154346C (it)
NZ (1) NZ189034A (it)
PH (1) PH15435A (it)
PL (1) PL118443B1 (it)
PT (1) PT68956A (it)
SG (1) SG68683G (it)
SU (3) SU1087075A3 (it)
YU (3) YU41607B (it)
ZW (1) ZW24978A1 (it)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE47592B1 (en) * 1977-12-29 1984-05-02 Ici Ltd Enzyme inhibitory phthalazin-4-ylacetic acid derivatives, pharmaceutical compositions thereof,and process for their manufacture
CA1143733A (en) * 1979-07-31 1983-03-29 Masao Yoshida Producing 7-alkoxycarbonyl-6,8-dimethyl-4- hydroxymethyl-1-phthalazone and intermediates
US4762839A (en) * 1985-06-06 1988-08-09 Tanabe Seiyaku Co., Ltd. Quinazolinone copmpounds useful for the prophyloxis and treatment of diabetic complications
DE3684410D1 (de) * 1985-11-07 1992-04-23 Pfizer Heterocyclische oxophthalazinylessigsaeure.
JPS63132889A (ja) * 1986-11-21 1988-06-04 Tanabe Seiyaku Co Ltd キナゾリノン誘導体
US5011840A (en) * 1986-11-24 1991-04-30 Pfizer Inc. Imidazolidinedione derivatives in diabetes treatment
GB8704569D0 (en) * 1987-02-26 1987-04-01 Ici America Inc Therapeutic agent
US4868301A (en) * 1987-06-09 1989-09-19 Pfizer Inc. Processes and intermediates for the preparation of oxophthalazinyl acetic acids having benzothiazole or other heterocyclic side chains
JPH0676391B2 (ja) * 1987-06-09 1994-09-28 フアイザー・インコーポレイテツド ベンゾチアゾール等の複素環側鎖を有するオキソフタラジニル酢酸類の製造方法
IL88150A0 (en) * 1987-11-02 1989-06-30 Merck & Co Inc Pharmaceutical tablet compositions containing phthalizine acetic acid compounds
DK607188A (da) * 1987-11-02 1989-06-22 Merck & Co Inc Tablet indeholdende en phthalazineddikesyreforbindelse
US4880928A (en) * 1987-12-21 1989-11-14 Merck & Co., Inc. Process for the preparation of 3-((4-bromo-2-fluorophenyl)methyl)-3,4-dihydro-4-oxo-1-phthalazine-acetic acid
US4904782A (en) * 1988-02-29 1990-02-27 Pfizer Inc. Process for the production of phthalazineacetic acid ester derivatives and a novel intermediate
US4940791A (en) * 1988-02-29 1990-07-10 Pfizer Inc. Process for the production of phthalazineacetic acid ester derivatives and a novel hydrazine containing intermediate
US4954629A (en) * 1989-05-11 1990-09-04 Pfizer Inc. Process and intermediates for the preparation of oxophthalazinyl acetic acids and analogs thereof
US4996204A (en) * 1989-05-11 1991-02-26 Pfizer Inc. Pyrido[2,3-d]pyridazinones as aldose reductase inhibitors
EP0397930A1 (en) * 1989-05-18 1990-11-22 Merck & Co. Inc. Process for the preparation of 3-[(4-bromo-2-fluorophenyl) methyl]-3,4-dihydro-4-oxo-1-phthalazineacetic acid
FR2647676A1 (fr) * 1989-06-05 1990-12-07 Union Pharma Scient Appl Nouveaux derives de pyridazinone, leurs procedes de preparation, medicaments les contenant, utiles notamment comme inhibiteurs de l'aldose reductase
US5304557A (en) * 1989-12-15 1994-04-19 Pfizer Inc. Substituted oxoophthalazinyl acetic acids and analogs thereof
US5037831A (en) * 1990-05-21 1991-08-06 American Home Products Corporation Spiro-isoquinoline-pyrrolidines and analogs thereof useful as aldose reductase inhibitors
FR2682108B1 (fr) * 1991-10-07 1994-01-07 Lipha Acide 3,4-dihydro-4-oxo-3(prop-2-enyl)-1-phtalazineacetiques et derives, leurs preparations et medicaments les contenant.
KR950703539A (ko) * 1992-09-28 1995-09-20 알렌 제이. 스피겔 당뇨병 합병증 치료용 치환된 피리미딘(substituted pyrimidines for control or diabetic complications)
WO1994010151A1 (en) * 1992-11-02 1994-05-11 Merck & Co., Inc. Substituted phthalazinones as nerotensin antagonists
CH683965A5 (it) * 1993-02-19 1994-06-30 Limad Marketing Exp & Imp Composti della classe dei ftalidrazidici come sostanza attiva in agenti antinfiammatori ed antitossici.
WO1995003053A1 (en) * 1993-07-26 1995-02-02 Fujisawa Pharmaceutical Co., Ltd. Oxophthalazines for treating cachexia
US6696407B1 (en) 1997-03-21 2004-02-24 The Regents Of The University Of California Huntington's disease treatment comprising administering aldose reductase inhibitors to increase striatal CNTF
AU6473898A (en) * 1997-03-21 1998-10-20 Regents Of The University Of California, The Methods for modulating neurotrophic factor-associated activity using aldose reductase inhibitors
SK141899A3 (en) * 1997-04-15 2000-09-12 Csir Corporate Building Pharmaceutical compositions having appetite suppressant activity
ID27884A (id) * 1998-03-31 2001-05-03 Inst For Pharm Discovery Inc Asam-asam indolealkanoat yang disubstitusikan.
TNSN99224A1 (fr) * 1998-12-01 2005-11-10 Inst For Pharm Discovery Inc Methodes de reduction des niveaux de glucose et triglyceride en serum et pour suppression de l'antigenese utilisant les acides la indolealkanoique
GB2355657B (en) * 1999-10-27 2004-07-28 Phytopharm Plc Inhibitors Of Gastric Acid Secretion
DE19963607B4 (de) * 1999-12-23 2005-12-15 Schering Ag Verfahren zur Herstellung von 4-(Heteroaryl-methyl) halogen-1(2H)-phthalazinonen
GB2363985B (en) * 2000-06-30 2004-09-29 Phytopharm Plc Extracts,compounds & pharmaceutical compositions having anti-diabetic activity and their use
SK6092003A3 (en) * 2000-11-30 2004-07-07 Pfizer Prod Inc Combination of GABA agonists and aldosereductase inhibitors
DE60204611T2 (de) 2001-02-28 2006-05-11 Pfizer Products Inc., Groton Sulfonyl-pyridazinon-derivate zur Verwendung als Aldose-reduktase-inhibitoren
KR100586138B1 (ko) 2001-03-30 2006-06-07 화이자 프로덕츠 인코포레이티드 피리다지논 알도스 리덕타제 저해제
CA2445871A1 (en) * 2001-04-30 2002-11-07 Pfizer Products Inc. Combinations of aldose reductase inhibitors and cyclooxygenase-2 inhibitors
AU761191B2 (en) 2001-05-24 2003-05-29 Pfizer Products Inc. Therapies for tissue damage resulting from ischemia
US20050209237A1 (en) * 2002-04-30 2005-09-22 Brazzell Romulus K Method for decreasing capillary permeability in the retina
CA2493755A1 (en) * 2002-07-26 2004-02-05 The Institutes For Pharmaceutical Discovery, Llc Substituted indolealkanoic acids derivative and formulations containing same for use in treatment of diabetic complications
US7572910B2 (en) * 2003-02-20 2009-08-11 Pfizer, Inc. Pyridazinone aldose reductase inhibitors
US20110092566A1 (en) * 2004-11-19 2011-04-21 Srivastava Satish K Treatment of cancer with aldose reductase inhibitors
JP4838582B2 (ja) * 2004-12-27 2011-12-14 岐阜プラスチック工業株式会社 台車用本体
ES2371393T3 (es) 2007-03-12 2011-12-30 Zadec Aps Extracto antidiabético de rooibos.
EP2848252A3 (en) 2007-03-23 2015-06-17 The Board of Regents of the University of Texas System Aldose reductase inhibitors for use in treating uveitis
US20090270490A1 (en) * 2008-04-24 2009-10-29 The Board Of Regents Of The University Of Texas System Methods involving aldose reductase inhibition
WO2012088525A2 (en) 2010-12-23 2012-06-28 The Board Of Regents Of The University Of Texas System Methods for treating copd
CA2895162C (en) 2012-12-14 2021-03-09 D. Lynn Kirkpatrick Methods and compositions for inhibiting cnksr1
WO2016172191A1 (en) 2015-04-20 2016-10-27 Phusis Therapeutics, Inc. Compounds, compositions and methods for inhibiting cnksr1
US12090142B2 (en) 2018-02-22 2024-09-17 Board Of Regents, The University Of Texas System Combination therapy for the treatment of cancer
WO2020071386A1 (ja) * 2018-10-04 2020-04-09 日東電工株式会社 耐熱離型シート及び熱圧着方法
JP6751974B1 (ja) * 2019-10-16 2020-09-09 株式会社コバヤシ 離型フィルム及び離型フィルムの製造方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833579A (en) * 1935-11-11 1974-09-03 Inoue Michiro 4-carbamoyl phthalazones
JPS5116430B2 (it) * 1971-08-05 1976-05-24
GB1398549A (en) * 1972-11-06 1975-06-25 Boots Co Ltd Phthalazine derivatives and their use in pharmaceutical compo sitions
AR205004A1 (es) * 1973-10-30 1976-03-31 Ishikawa M Procedimiento para preparar derivados de 6,8-dialquil-7-alcoxi-carbonil-4-hidroximetil-1-ftalazona y la 7,8-lactona
DE2451117A1 (de) * 1973-10-31 1975-05-22 Boots Co Ltd Therapeutisch wirksame verbindungen
GB1502312A (en) 1975-03-20 1978-03-01 Ici Ltd Quinolone derivatives
IE43079B1 (en) * 1975-03-20 1980-12-17 Ici Ltd Quinolone derivatives
JPS5214788A (en) * 1975-07-21 1977-02-03 Fuji Photo Film Co Ltd Process for preparing phthalazinone and its derivatives
NL7702763A (nl) * 1976-03-18 1977-09-20 Takio Shimamoto En Masayuki Is Werkwijze voor de bereiding van thromboxaan- -antagonisten en van preparaten die deze stof- fen bevatten.
IE47592B1 (en) * 1977-12-29 1984-05-02 Ici Ltd Enzyme inhibitory phthalazin-4-ylacetic acid derivatives, pharmaceutical compositions thereof,and process for their manufacture
US4293553A (en) * 1978-08-11 1981-10-06 Masayuki Ishikawa 1-Phthalazone derivatives, and use thereof

Also Published As

Publication number Publication date
AU516264B2 (en) 1981-05-28
IN150196B (it) 1982-08-14
AT365581B (de) 1982-01-25
JPH0262532B2 (it) 1990-12-26
IL56099A0 (en) 1979-01-31
NO154346C (no) 1986-09-03
YU312778A (en) 1983-01-21
SU1072803A3 (ru) 1984-02-07
GR65303B (en) 1980-08-01
FI64357C (fi) 1983-11-10
CA1107732A (en) 1981-08-25
YU41607B (en) 1987-12-31
DE2861170D1 (en) 1981-12-24
CY1219A (en) 1984-04-06
SU1272984A3 (ru) 1986-11-23
SG68683G (en) 1984-08-03
ATA937678A (de) 1981-06-15
US4393062A (en) 1983-07-12
DK151253C (da) 1988-05-16
FI64357B (fi) 1983-07-29
YU42807B (en) 1988-12-31
IT7852480A0 (it) 1978-12-28
YU232182A (en) 1983-01-21
HU182585B (en) 1984-02-28
AU4204078A (en) 1979-07-05
JPS6326110B2 (it) 1988-05-27
PT68956A (en) 1979-01-01
JPS63119469A (ja) 1988-05-24
YU232082A (en) 1983-01-21
IE782337L (en) 1979-06-29
PH15435A (en) 1983-01-18
MY8500359A (en) 1985-12-31
ZW24978A1 (en) 1980-10-22
US4251528A (en) 1981-02-17
EP0002895B1 (en) 1981-10-14
YU42054B (en) 1988-04-30
DK541878A (da) 1979-06-30
BG34336A3 (en) 1983-08-15
IE47592B1 (en) 1984-05-02
NO784397L (no) 1979-07-02
EP0002895A1 (en) 1979-07-11
SU1087075A3 (ru) 1984-04-15
DK151253B (da) 1987-11-16
ES476496A1 (es) 1979-04-16
HK22484A (en) 1984-03-23
NZ189034A (en) 1981-11-19
NO154346B (no) 1986-05-26
JPS5495582A (en) 1979-07-28
CS241015B2 (en) 1986-03-13
FI783844A (fi) 1979-06-30
DD141021A5 (de) 1980-04-09
PL118443B1 (en) 1981-10-31

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