A one step synthesis of functionlized N-acylanthranilamidevia Pd-catalyzed carboxamidation of o-halo substituted N-phenylamide consisting of isocyanideinsertion followed by oxidation of the imine intermediate has been achived successfully. Furthermore, at elevated temprature (160oC) the Pd-catalyzed tandem reaction afforded functionlized quinazolin-4-one in a single step without the isolation of
Microwave-assisted one-pot synthesis of 2,3-disubstituted 3H-quinazolin-4-ones
作者:Ji-Feng Liu、Jaekyoo Lee、Audra M. Dalton、Grace Bi、Libing Yu、Carmen M. Baldino、Eric McElory、Matt Brown
DOI:10.1016/j.tetlet.2005.01.008
日期:2005.2
A practical synthesis of 2,3-disubstituted 3H-quinazolin-4-ones 1 with broad chemistry scope is described. The key step is the microwave promoted one-pot, two-step reaction sequence combining anthranilic acids, carboxylic acids, and amines providing efficient access to this important class of heterocycles. (C) 2005 Elsevier Ltd. All rights reserved.