Efficient synthesis of highly substituted pyrroles based on the tandem reactions: intermolecular amination and Pd(II)-catalyzed intramolecular hydroamidation
摘要:
A novel and efficient method for construction of polysubstituted pyrroles, which included an intermolecular amination and Pd(II)-catalyzed intramolecular hydroamidation, was developed. It was found that the reactions gave high yields (55-92%). Crown Copyright (C) 2008 Published by Elsevier Ltd. All rights reserved.
developed for the synthesis of substituted pyrrole derivatives from propargylic acetates, enoxysilanes and primary amines. Various aromatic and aliphatic propargylic acetates participate well in the reaction, providing the propargylation/amination/cycloisomerization products in good yields with complete regioselectivity. The one-pot multicomponent coupling reaction furnishes substituted pyrroles in high