Synthesis and properties of cyclohepta [cd] benzothiophenes

T Horaguchi, T Kubo, K Tanemura…

Index: Horaguchi, Takaaki; Kubo, Takuji; Tanemura, Kiyoshi; Suzuki, Tsuneo Journal of Heterocyclic Chemistry, 1998 , vol. 35, # 3 p. 649 - 653

Full Text: HTML

Citation Number: 5

Abstract

Abstract Cyclohepta [cd] benzothiophene 3, a new heterocyle, was synthesized starting from benzothiophene via eight steps in 14% total yield. Chemical reactions of 3 were examined on formylation, acetylation, bromination, catalytic hydrogenation and Diels-Alder reactions. The results show that the benzothiophene moiety of 3 has aromatic character and the carbon [DOUBLE BOND] carbon double bonds in a seven-membered ring posseses ...