Concise Synthesis of Well??Defined Linear and Branched Oligothiophenes with Nickel??Catalyzed Regiocontrolled Cross??Coupling of 3??Substituted Thiophenes by …

…, K Murakami, S Tamba, A Sugie, A Mori

Index: Tanaka, Shota; Tanaka, Daiki; Tatsuta, Go; Murakami, Kohei; Tamba, Shunsuke; Sugie, Atsushi; Mori, Atsunori Chemistry - A European Journal, 2013 , vol. 19, # 5 p. 1658 - 1665

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Citation Number: 5

Abstract

Abstract The synthesis of linear and branched oligothiophenes of well-defined structures is performed with regioselective deprotonation of 3-substituted thiophenes and nickel- catalyzed cross-coupling of the thus formed metalated species with a bromothiophene. The reaction of 3-hexylthiophene with EtMgCl and 2, 2, 6, 6-tetramethylpiperidine (TMP-H, 10 mol%) induces the metalation selectively at the 5-position by use of the catalytically ...