This article is focused on the development of practical approaches to the synthesis of 4-azido-5-arylthiophene-2-carboxylates and 4-amino-5-arylthiophene-2-carboxylates using the Fiesselmann reaction. The photochemical and thermal (including microwave-assisted) decomposition of 4-azido-5-arylthiophene-2-carboxylates have been studied in order to synthesize fused 4H-thieno[3,2-b]pyrrole derivatives. The proposed approaches allow to obtain functionally substituted heteroacenes, which are of interest as building blocks for organic semiconductors.

中文翻译：

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4-叠氮基-5-芳基噻吩-2-羧酸甲酯分解合成新型稠合4H-噻吩并[3,2-b]吡咯衍生物

本文的重点是开发使用 Fiesselmann 反应合成 4-叠氮基-5-芳基噻吩-2-羧酸盐和 4-氨基-5-芳基噻吩-2-羧酸盐的实用方法。已经研究了 4-叠氮基-5-芳基噻吩-2-羧酸盐的光化学和热（包括微波辅助）分解，以合成稠合的 4 H-噻吩并[3,2- b ] 吡咯衍生物。所提出的方法允许获得功能取代的杂并苯，它们作为有机半导体的构建块是令人感兴趣的。