Rh(II)-catalyzed intramolecular annulation of N-sulfonyl 1,2,3-triazoles with indole derivatives: a new method for synthesis pyranoindoles
作者:Hui Xie、Jian-Xin Yang、Pranjal Protim Bora、Qiang Kang
DOI:10.1016/j.tet.2016.04.017
日期:2016.6
for the synthesis of Z-alkenyl-pyranoindoles had been developed by utilizing Rh(II)-catalyzed intramolecular cyclization of N-sulfonyl-1,2,3-triazoles with indole derivatives. A variety of pyranoindoles were obtained in 44–93% yields. Moreover, a more convenient synthesis of pyranoindoles starting from terminal alkyne was realized via a Cu–Rh sequentially catalyzed one-pot cascade reaction.
通过利用Rh(II)催化的带有吲哚衍生物的N-磺酰基-1,2,3-三唑的分子内环化作用,已经开发了直接和高度立体选择性的合成Z-烯基-吡喃并吲哚的方法。以44–93%的产率获得了多种吡喃吲哚。此外,通过铜-Rh顺序催化的一锅级联反应,实现了从末端炔烃开始更方便地合成吡喃并吲哚。