process for the production of n - (2cyan - 4 - nitrophenyl) - n ', n' - disubstituierten formamidinen and n - (2 - cyan - 6 - nitrophenyl) n ', n' - disubstituierten formamidinen

摘要

A process for the production of N-(o-cyanophenyl)-N,N'-disubstituted formamidines bearing nitro substituents in the 4-position or the 6-position comprising the nitration of the corresponding compounds having no nitro substituent. The process is distinguished by its high selectivity.