By direct cyanidation, the reaction of p-toluic acid with urea would convert the carboxyl group to cyano group to give p - tolunitrile.

• 本文报道了对甲苯甲酸与尿素反应,进行直接氰化将羧基转变成氰基生成对甲苯甲腈的情况,改进了对甲苯甲酸直接氰化的工艺条件。