Silica gel supported TaBr5: new catalyst for the facile and rapid cyclization of 2′-aminochalcones to the corresponding 2-aryl-2,3-dihydroquinolin-4(1H)-ones under solvent-free conditions
作者:Naseem Ahmed、Johan E. van Lier
DOI:10.1016/j.tetlet.2006.02.086
日期:2006.4
Silica gel supported TaBr5 (5-10 mol %) is anew solid-support catalyst that can be used under solvent-free conditions for the facile and efficient isomerization of 2'-aminochalcones to the corresponding 2-aryl-2,3-dihydroquinolin-4(1H)-ones. The catalyst is easily prepared, stable and employed under environmentally friendly conditions. (c) 2006 Elsevier Ltd. All rights reserved.