Bridging homogeneous and heterogeneous catalysis with CAN·SiO<sub>2</sub>as a solid catalyst for four-component reactions for the synthesis of tetrasubstituted pyrroles
作者:Amol B. Atar、Jong Su Kim、Kwon Taek Lim、Yeon Tae Jeong
DOI:10.1039/c4nj01234h
日期:——
An efficient and expeditious method has been developed for the synthesis of tetrasubstituted pyrroles via a four component, one-pot cyclocondensation reaction of amines, aldehydes, dialkyl acetylenedicarboxylates and nitroalkanes using silica supported ceric ammonium nitrate as a heterogeneous catalyst for the first time. Reusable silica supported ceric ammonium nitrate was found to be a highly efficient
The three-component reaction of primary amines, dialkyl acetylenedicarboxylates and beta-nitrostyrene derivatives in the presence of Iron(III) chloride afforded 1,2,3,4-tetra-substituted pyrroles in high yields. These reactions could precede via domino Michael addition/cyclization process. (C) 2011 Elsevier Ltd. All rights reserved.