PRODUCTION OF DIACETYL CYANIDE

PURPOSE:To obtain diacetyl cyanide in high yield while suppressing formation of vinyl alpha-cyanoacetate as a by-product, by reacting prussic acid with a ketene in an acetic ester in the presence of a tertiary amine catalyst. CONSTITUTION:Prussic acid is reacted with ketene in an acetic ester solven...

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Bibliographic Details
Main Authors SEGAWA HIROZO, SHIRAKAWA HIDEO, NAKAMURA AKIRA
Format Patent
LanguageEnglish
Published 26.05.1988
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 diacetyl cyanide in high yield while suppressing formation of vinyl alpha-cyanoacetate as a by-product, by reacting prussic acid with a ketene in an acetic ester in the presence of a tertiary amine catalyst. CONSTITUTION:Prussic acid is reacted with ketene in an acetic ester solvent containing 25-35% pressuic acid by the use of a tertiary amine such as triethanolamine, etc., as a catalyst at 15-25 deg.C to give the aimed substance. The amount of the tertiary amine used in the reaction is >=1% based on prussic acid. Diacetyl cyanide is useful as a raw material for C-alkyl or C- halogenoalkyltartronic acid, a synthetic intermediate for amino acid, barbituric acid and oxazolidine derivative and as a raw material for vinylidene cyanide, an intermediate for piezoelectric element material.
Bibliography:Application Number: JP19860268243