Iridium-Catalysed Cascade Synthesis of Oxindoles Using Diazo Compounds: A Quick Entry to C-7-Functionalized Oxindoles
作者:Ujjwal Karmakar、Debapratim Das、Rajarshi Samanta
DOI:10.1002/ejoc.201700214
日期:2017.5.18
A cascade iridium-catalysed oxindole synthesis was achieved using pyridyl-protected anilines and bis(2,2,2-trifluoroethyl) 2-diazomalonate. The developed protocol is simple and scalable, and has a broad scope and excellent regioselectivity. The pyridyl directing group can easily be removed. The method was further extended to give C-7-functionalized oxindole derivatives in a straightforward manner.
使用吡啶基保护的苯胺和双 (2,2,2-三氟乙基) 2-重氮丙二酸酯实现了级联铱催化的羟吲哚合成。开发的协议简单且可扩展,具有广泛的范围和出色的区域选择性。吡啶基导向基团可以很容易地去除。该方法进一步扩展到以直接的方式得到 C-7 官能化的羟吲哚衍生物。已经探索了双 (2,2,2-三氟乙基) 2-重氮丙二酸酯在羟吲哚制备中的作用。