Consecutive Thiophene-Annulation Approach to π-Extended Thienoacene-Based Organic Semiconductors with [1] Benzothieno [3, 2-b][1] benzothiophene (BTBT) …
T Mori, T Nishimura, T Yamamoto, I Doi…
Index: Mori, Takamichi; Nishimura, Takeshi; Yamamoto, Tatsuya; Doi, Iori; Miyazaki, Eigo; Osaka, Itaru; Takimiya, Kazuo Journal of the American Chemical Society, 2013 , vol. 135, # 37 p. 13900 - 13913
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Citation Number: 90
Abstract
We describe a new synthetic route to the [1] benzothieno [3, 2-b][1] benzothiophene (BTBT) substructure featuring two consecutive thiophene-annulation reactions from o-ethynyl- thioanisole substrates and arylsulfenyl chloride reagents that can be easily derived from arylthiols. The method is particularly suitable for the synthesis of unsymmetrical derivatives, eg,[1] benzothieno [3, 2-b] naphtho [2, 3-b] thiophene,[1] benzothieno [3, 2-b] anthra [2, 3- ...
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