SEARCH Articles Figures Tables 1-Benzothiophen Annulation with thiophene (synthesis of benzothiophenes) Benzothiophene Benzothiophene synthesis Benzothiophenes Benzothiophens Synthesis of Benzothiophenes Synthesis of Benzothiophenes Synthesis of Benzothiophenes and Benzofurans Synthesis of Benzothiophenes via 4 1 Cycloaddition Reactions Synthesis of Benzothiophens by Ring-closure Reactions Synthesis of Thiophene and Benzothiophene