Reactions of 3-methylamino-5-phenylthiophene with α,β-unsaturated esters and α,β-unsaturated nitriles

Article abstract of DOI:10.1002/jhet.5570370222

Treatment of 3-methylamino-5-phenylthiophene with α,β-unsaturated esters, i.e., methyl acrylate, (E)-methyl crotonate, diethyl fumarate, diethyl maleate and ethyl propiolate, in tetrahydrofuran for several days at reflux gave 1-methyl-3,4-dihydrothieno[2,