Concise Synthesis of Spiro[indoline-3,2′-pyrrolidine] and 1-Azacarbazole Derivatives <i>via</i>
Copper-Catalyzed Cyclization of Indoles
作者:Peng-Fei Wang、Chao Chen、Hui Chen、Li-Shuai Han、Liu Liu、Hongbin Sun、Xiaoan Wen、Qing-Long Xu
DOI:10.1002/adsc.201700073
日期:2017.7.17
A high‐yielding, copper‐catalyzed dearomatization reaction of indole from 2‐methylindole‐derived oxime acetates was realized, providing access to structurally novel spiro[indoline‐3,2′‐pyrrolidine] derivatives in 67–98% yields. When the C‐2 position of the indole was not substituted, azacarbazole derivatives were obtained in moderate yields. This transformation provides an efficient approach to access
实现了由2-甲基吲哚衍生的肟乙酸酯产生的高产率,铜催化的吲哚脱芳香化反应,可提供结构新颖的螺[吲哚啉-3,2'-吡咯烷]衍生物,产率为67-98%。当吲哚的C–2位未被取代时,可得到中等收率的氮杂咔唑衍生物。这种转化提供了一种有效的方法,可用于获得具有广泛底物范围的含氮螺环吲哚胺和氮杂咔唑衍生物。