Trichloroacetic acid reacts with various enamines in benzene with evolution of CO2 and formation of α-(trichloromethyl) amine derivatives. The latter, when heated in ethanol undergo rearrangement to the corresponding α-chloroacylamines.
Heterocyclic compounds selected from the group consisting of the compounds [IV] to [VII], [IX] and [X]. The heterocyclic compounds are useful for reactive materials in chemical industry and a process for producing the heterocyclic compounds.