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General Synthesis of Thiophene and Selenophene-Based Heteroacenes

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posted on 10.11.2005, 00:00 by Toshihiro Okamoto, Kenichi Kudoh, Atsushi Wakamiya, Shigehiro Yamaguchi
A new intramolecular triple cyclization of bis(o-haloaryl)diacetylenes, via dilithiation followed by reaction with chalcogen elements, produces π-conjugated compounds containing heterole−1,2-dichalcogenin−heterole fused tricyclic skeletons. The subsequent dechalcogenation with copper metal affords a series of thiophene- and selenophene-based heteroacenes.