The synthesis of novel 5,7-diaryl and diheteroaryl indoles has been explored via efficient double Suzuki–Miyaura coupling. The method notably employs a low catalyst loading of Pd(PPh3)4 (1.5 mol%/coupling) and water as the reaction solvent to obtain 5,7-diarylated indoles without using N-protecting groups in up to 91% yield. The approach is also suitable for N-protected and 3-substituted indoles and
通过有效的双 Suzuki-Miyaura 偶联探索了新型 5,7-二芳基和二杂芳基
吲哚的合成。该方法特别采用低催化剂负载的 Pd(PPh 3 ) 4 (1.5 mol%/偶合)和
水作为反应溶剂,在不使用N-保护基团的情况下以高达 91% 的收率获得 5,7-二芳基化
吲哚。该方法也适用于N-保护和3-取代的
吲哚,构成了
吲哚苯环的重要绿色便捷芳基化策略。合成的二芳基
吲哚是荧光的。