PRODUCTION OF FORMYL BENZOIC ACID

PURPOSE: To obtain the subject compound useful as an intermediate for agrochemicals and medicines in high purity and in a high yield by hydrolyzing dichloromethylbenzoyl chloride or pentachloroxylene in the presence of a catalyst in a sulforane solvent. CONSTITUTION: A compound of formula I or formu...

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Bibliographic Details
Main Authors SUGIYAMA MASAHIDE, MATSUZAWA MASAFUMI
Format Patent
LanguageEnglish
Published 21.05.1996
Edition6
Subjects
ACYCLIC OR CARBOCYCLIC COMPOUNDS
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Summary:PURPOSE: To obtain the subject compound useful as an intermediate for agrochemicals and medicines in high purity and in a high yield by hydrolyzing dichloromethylbenzoyl chloride or pentachloroxylene in the presence of a catalyst in a sulforane solvent. CONSTITUTION: A compound of formula I or formula II (the substitution positions of the substituents CHCl2 and CHO are ortho, meta or para) is hydrolyzed in the presence of a catalyst (e.g. zinc oxide) in a sulforane solvent at 100-170 deg.C to obtain the formyl benzoic acid of formula III. The employment of the sulforane as the solvent enables to prevent the lowering of a reactor efficiency, reduce the amount of the solvent and eliminate the progress of side reactions. The catalyst and the solvent are used in amounts of 0.01-1.0wt.% and 0.1-10 times weight, respectively, on the basis of the weight of the starting substance.
Bibliography:Application Number: JP19940289290