Preparation of isocyanates and/or derivatives thereof

摘要

Isocyanates and derivatives thereof are prepared by oxidative conversion of compounds having at least one group wherein X represents OY or wherein Y is H, a metal ion or group NR3R4R5R6 wherein each of R3, R4, R5 and R6 which may be the same or different, is H, alkyl or (substituted) (alk)aryl and Z is a (substituted) alkyl or aryl group. Phenyl isocyanate and derivatives thereof are preferably prepared electrochemically from the corresponding oxamides and oxanilides.