Synthetic utility of bifunctional thiophene derivatives and antimicrobial evaluation of the newly synthesized agents

The key intermediate ethyl 2-amino-5-benzoyl-4-methylthiophene-3-carboxylate was prepared by a Gewald reaction starting from benzoylacetone, sulfur, and ethyl cyanoacetate in the presence of diethylamine. This intermediate reacted with various reagents to afford different fused and polyfunctional substituted thiophenes. Antimicrobial screening of the synthesized compounds exhibited promising antimicrobial activities.