Abstract Under microwave irradiation and solvent??free conditions, cyanoacetates (cyanoacetamides) react with ketones and sulphur in the presence of a small amount of morpholine to give 2??amino??thiophene??3??carboxylic derivatives. In particular, tetrahydro?? benzo [b] thiophene??3??carboxylic acid N??aryl amides were synthesized in high yields of 84– 95%.
