of aldehydes, 2-aminopyridines and trimethylsilyl cyanide was carried out in the presence of MCM-41 supported boron trifluoride (BF3/MCM-41) as a nanostructured solid acidcatalyst for the synthesis of 3-iminoaryl-imidazo[1,2-a]pyridine derivatives. MCM-41 nanoparticles were synthesized by a sol–gel method and BF3/MCM-41 samples with various loading amounts of BF3 and different calcination temperatures
Silica-sulfuric acid: a highly efficient catalyst for the synthesis of imidazo[1,2-a]pyridines using trimethysilyl cyanide or cyanohydrins
作者:Anatoliy I. Polyakov、Vera A. Eryomina、Lidiya A. Medvedeva、Nadezhda I. Tihonova、Anna V. Listratova、Leonid G. Voskressensky
DOI:10.1016/j.tetlet.2009.05.080
日期:2009.7
This Letter describes a novel synthetic approach towards imidazo[1,2-a]pyridines via a three-component condensation using trimethylsilyl cyanide (TMSCN) or cyanohydrins as the source of CN− ions and silica-sulfuric acid as the catalyst.