The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 09, 1980
Filed:
Dec. 08, 1978
Kurt Findeisen, Odenthal, DE;
Herbert Schwarz, Leverkusen, DE;
Bayer Aktiengesellschaft, Leverkusen, DE;
Abstract
Acyl cyanides of the general formula ##STR1## in which R represents alkyl or substituted alkyl of from 1 to 8 carbon atoms; cycloalkyl or substituted cycloalkyl with 3 to 12 carbon atoms; aryl or substituted aryl; or an optionally substituted 5-membered or 6-membered heterocyclic radical which can additionally also be fused with a benzene ring, are prepared by reacting the corresponding carboxylic acid anhydride with an alkali metal cyanide or anhydrous hydrocyanic acid, at a temperature of between 50.degree. and 250.degree. C. and the resulting acyl cyanide is removed from the reaction medium by distillation, immediately after it has been formed.