GB1321463A - Process for the preparation of phthalazone - Google Patents

Process for the preparation of phthalazone

Info

Publication number
GB1321463A
GB1321463A GB4479970A GB4479970A GB1321463A GB 1321463 A GB1321463 A GB 1321463A GB 4479970 A GB4479970 A GB 4479970A GB 4479970 A GB4479970 A GB 4479970A GB 1321463 A GB1321463 A GB 1321463A
Authority
GB
United Kingdom
Prior art keywords
phthalazone
mixture
preparation
phthalide
acetoxy
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.)
Expired
Application number
GB4479970A
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.)
Produits Chimiques Pechiney Saint Gobain
Original Assignee
Produits Chimiques Pechiney Saint Gobain
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 Produits Chimiques Pechiney Saint Gobain filed Critical Produits Chimiques Pechiney Saint Gobain
Publication of GB1321463A publication Critical patent/GB1321463A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07D—HETEROCYCLIC COMPOUNDS
    • C07D237/00—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings
    • C07D237/26—Heterocyclic compounds containing 1,2-diazine or hydrogenated 1,2-diazine rings condensed with carbocyclic rings or ring systems
    • C07D237/30—Phthalazines
    • C07D237/32—Phthalazines with oxygen atoms directly attached to carbon atoms of the nitrogen-containing ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Abstract

1321463 Preparation of phthalazone PRODUITS CHIMIQUES PECHINEY-SAINT-GOBAIN 21 Sept 1970 [24 Sept 1969] 44799/70 Heading C2C Phthalazone is obtained by boiling for from 0À5 to 4 hours a mixture of acetoxy-3 phthalide and an aqueous solution of hydrazine hydrate and separating the phthalazone formed from the mixture. The molar ratio of acetoxy-3 phthalide to hydrazine hydrate (which is advantageously employed as a 95% by wt. aqueous solution) in the mixture preferably ranges from 1 : 1 to 1 : 2.
GB4479970A 1969-09-24 1970-09-21 Process for the preparation of phthalazone Expired GB1321463A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6932556A FR2058755A5 (en) 1969-09-24 1969-09-24

Publications (1)

Publication Number Publication Date
GB1321463A true GB1321463A (en) 1973-06-27

Family

ID=9040540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4479970A Expired GB1321463A (en) 1969-09-24 1970-09-21 Process for the preparation of phthalazone

Country Status (6)

Country Link
BE (1) BE756469A (en)
DE (1) DE2045111A1 (en)
FR (1) FR2058755A5 (en)
GB (1) GB1321463A (en)
IT (1) IT1014013B (en)
NL (1) NL7012482A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2220618C2 (en) * 1972-04-27 1985-01-10 Agfa-Gevaert Ag, 5090 Leverkusen Image receiving material

Also Published As

Publication number Publication date
BE756469A (en) 1971-03-22
FR2058755A5 (en) 1971-05-28
DE2045111A1 (en) 1971-04-01
IT1014013B (en) 1977-04-20
NL7012482A (en) 1971-03-26

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees