PROCESS FOR THE PRODUCTION OF HIGHLY PURE POLYFUNCTIONAL CYANIC ACID ESTERS

摘要

1526450 Aromatic cyanates BAYER AG 20 Feb 1976 [22 Feb 1975 2 July 1975] 06765/76 Heading C2C Polyfunctional aromatic cyanates are prepared by reacting an excess of a cyanogen halide, in the presence of a tertiary amine, with a trialkyl ammonium phenolate of the formula wherein Ar is an optionally substituted aromatic radical, R 1 , R 2 and R 3 , which may be the same or different, are linear or branched alkyl, and n is from 2 to 6. Ar is preferably wherein X is hydrogen, halogen, alkyl or phenyl, each X being the same or different, or two radicals X on adjacent carbon atoms may together form a 5- or 6-membered carbocyclic or heterocyclic ring, and in Formula III, X may also represent α is from 1 to 6-n; A is -O-, -SO 2 -, -CO-, -S-, -OCO . O-, C 1 to C 9 alkylene optionally substituted by alkyl or phenyl, a 5- or 6- membered cycloaliphatic or aromatic ring, or a single bond; c is from 1 to 5 - n and b is from 1 to 5-n.