Tetrahedron

Homologous series of regioregular alkylsubstituted oligothiophenes up to an 11-mer

J Krömer, P Bäuerle

Index: Kroemer, Jens; Baeuerle, Peter Tetrahedron, 2001 , vol. 57, # 17 p. 3785 - 3794

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Citation Number: 37

Abstract

A complete series of structurally well-defined butylated oligothiophenes up to an 11-mer was synthesized by a combination of aryl–aryl cross-coupling reactions and cyclization of 1, 3- butadiyne precursors with sulfide anions. Palladium-catalyzed cross-coupling of halogenated thiophene units with trimethylsilylacetylene effectively yields ethynylated thiophenes which after deprotection are oxidatively coupled to the corresponding 1, 3- ...