Copper-Catalyzed Three-Component Formal [3 + 1 + 2] Benzannulation for Carbazole and Indole Synthesis
作者:Tenglong Guo、Li Han、Tingpeng Wang、Lan Lei、Jian Zhang、Dezhu Xu
DOI:10.1021/acs.joc.0c01056
日期:2020.7.17
substituted carbazoles and indoles were obtained up to 95% yield. Furthermore, the resulting products exhibit unusual aggregation-induced emission (AIE) properties in the solid state. This method features high atom-economy, cheap catalysts and oxidants, wide substrate scope, and saturated ketones as one-carbon and two-carbon sources, thus providing an efficient approach to polycyclic carbazole and indole
铜催化和2,2,6条件下已成功开发了吲哚-3-甲醛或1-甲基-吡咯-2-甲醛与两种不同分子的饱和酮的三组分形式[3 +1 + 2]苯环化反应,6-四甲基哌啶-1-氧基(TEMPO)介导的条件。获得了各种不对称取代的咔唑和吲哚,收率高达95%。此外,所得产物在固态下表现出异常的聚集诱导发射(AIE)性质。该方法具有高原子经济性,廉价的催化剂和氧化剂,较宽的底物范围以及作为一碳和二碳源的饱和酮,因此为多环咔唑和吲哚化合物提供了一种有效的方法。