Preparation of acyl cyanides

Details Preparation of acyl cyanides Preparation of acyl cyanides

1982-10-22

1984-06-19

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260464, 2604654, 544163, 548128, 548236, 548245, 548248, 548255, 548262, 548333, 548341, 548530, 549483, 560 88, 560127, 560196, C07C12000, C07C12134, C07C12176

Patent

active

044552645

ABSTRACT:
Acyl cyanides of the formula ##STR1## in which R represents an optionally substituted alkyl group having 1 to 8 carbon atoms, an optionally substituted cycloalkyl group having 3 to 12 carbon atoms or an optionally substituted aryl group, or an optionally substituted 5-membered or 6-membered heterocyclic radical which additionally can be fused to a benzene ring,
are obtained in high yields by reacting carboxylic acid anhydrides of the formula R--CO--O--CO--R (II) with trimethylsilyl cyanide, (CH.sub.3).sub.3 Si--CN (III), if appropriate in the presence of a catalyst and, if appropriate, in the presence of a diluent, at a temperature between 50.degree. and 250.degree. C. The acyl cyanides can be used as intermediate products, for example, for the preparation of certain herbicidally active compounds of the triazinone series.

REFERENCES:
patent: 4143068 (1979-03-01), Findeisen
patent: 4238412 (1980-12-01), Findeisen et al.
Herrmann et al., Synthesis No. 3, Mar. 1979, pp. 204-205.

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