Process for the preparation of acyl cyanides

Details Process for the preparation of acyl cyanides Process for the preparation of acyl cyanides

1978-12-08

1980-12-09

Mars, Howard T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603265J, 2603478, 260464, 260465R, 2604651, 544 8, 544 88, 544 63, 544106, 546184, 546245, 546314, 548128, 548215, 548240, 548255, 548335, 548337, 548338, 548339, 548346, 548262, 548373, 548375, C07C12000

Patent

active

042384125

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.

REFERENCES:
patent: 4117008 (1978-09-01), Klenk et al.
Erlenmeyer, Liebigs Ann. Chem. vol. 287, pp. 302-307 (1895).
Thesing et al., Angewandte Chemie, vol. 68, pp. 425-426, 434-435, (1956).

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