Abstract: Thioxothienopyrimidinones, alkylthio-and arylalkylthiothienopyrimidinones, thienopyrimidinones, thienopyrimidines a thienopyrimidinedione and a thienotriazolo- pyrimidinone were prepared from 2-amino-3-carboethoxy-4, 5-disubstituted thiophenes and 2-amino-3-cyano-4, 5-disubstituted thiophenes via reactions with different reagents.