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Efficient synthesis of thieno[3,2-b:4,5-b']diindoles and benzothieno[3,2-b]indoles by Pd-catalyzed site-selective C-C and C-N coupling reactions. 2012

Tran Quang Hung, and Tuan Thanh Dang, and Alexander Villinger, and Tran Van Sung, and Peter Langer
Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany.

Heteroacenes (thieno[3,2-b:4,5-b']diindoles and benzothieno[3,2-b]indoles) were efficiently synthesized from tetrabromothiophene and 2,3-dibromobenzothiophene in two steps, respectively. In the first step, a site-selective Pd-catalyzed C-C coupling is carried out, followed by a two-fold C-N coupling with aromatic and aliphatic amines.

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