A METHOD OF PREPARING PYRIDAZINONE DERIVATIVES

A method for the preparation of a pyridazinone derivative having general formula (I), where: R is a phenyl group, optionally substituted, R is H, alkyl or carboxy, R is H, alkyl or alkoxy and R is alkyl; said method comprising reacting a hydrazone of glyoxylic acid halide having formula (VII) in whi...

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Bibliographic Details
Main Authors HOWARTH, MICHAEL, COX, BRIAN, GEOFFREY
Format Patent
LanguageEnglish
French
German
Published 16.10.1996
Edition6
Subjects
AGRICULTURE
ANIMAL HUSBANDRY
BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES
CHEMISTRY
FISHING
FORESTRY
HETEROCYCLIC COMPOUNDS
HUMAN NECESSITIES
HUNTING
METALLURGY
ORGANIC CHEMISTRY
PEST REPELLANTS OR ATTRACTANTS
PLANT GROWTH REGULATORS
PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF
TRAPPING
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Summary:A method for the preparation of a pyridazinone derivative having general formula (I), where: R is a phenyl group, optionally substituted, R is H, alkyl or carboxy, R is H, alkyl or alkoxy and R is alkyl; said method comprising reacting a hydrazone of glyoxylic acid halide having formula (VII) in which X is halogen, with an ester of formula (VIII) in the presence of an alkaline earth base.
Bibliography:Application Number: EP19900913854