Mahmoud Nassiri - Department of Marine Chemistry, Faculty of marine science, Chabahar Maritime University, Chabahar, Iran

Three-component reactions involving benzothiazole, isoquinoline and phenanthridine with dimethyl acetylenedicarboxylate in the presence of 4-hydroxycoumarine are described. The reactions proceeded smoothly at room temperature without using any catalyst. The structures of the synthesized compounds have been characterized by the spectral studies

Aza-heterocycles; Dimethyl acetylenedicarboxylate; 4-Hydroxycoumarine