Synthesis of Polysubstituted Pyrroles from Activated Alkynes and<i>N</i>-Propargylamines through Base-Catalyzed Cascade Reaction
作者:Jianquan Weng、Yong Chen、Binjie Yue、Meng Xu、Hongwei Jin
DOI:10.1002/ejoc.201500166
日期:2015.5
A novel K3PO4-catalyzed synthesis of polysubstitutedpyrroles by a Michael addition/alkyne carbocyclization of activatedalkynes and N-propargylamines has been developed. This transition-metal-free cascade process represents an environmental friendly and efficient way to construct polysubstitutedpyrroles in good yields. Catalyzed by CsF, a Michael addition/aza-Claisen rearrangement/cyclization sequential
Silver-catalyzed chemoselective annulation of propargyl amines with alkynes for access to pyridines and pyrroles
作者:Tauqir A. Nizami、Ruimao Hua
DOI:10.1016/j.tet.2017.09.002
日期:2017.10
The annulation of propargyl amines with electron-deficient alkynes in the presence of silver salts affording pyridines and pyrroles has been developed. The chemoselective [4+2] or [3+2] annulation approach to pyridines or pyrroles depends on the structures of propargyl amines and the different reaction conditions.