An efficient non-ionic surfactant catalyzed multicomponent synthesis of novel benzylamino coumarin derivative via Mannich type reaction in aqueous media
作者:Atul Kumar、Maneesh Kumar Gupta、Mukesh Kumar
DOI:10.1016/j.tetlet.2011.06.040
日期:2011.8
An efficient non-ionic surfactant catalyzed multicomponent synthesis of novel benzylamino coumarin derivatives has been developed from secondary amines, aromatic aldehyde, and 4-hydroxy coumarin via Mannich type reaction in aqueousmedia. In this Mannich type reaction, surfactant forms stable colloidal medium to stabilize iminium ion which undergoes nucleophilic addition of 4-hydroxy coumarin to give
A convenient and practical InCl3 catalyzed three-component reaction of 4-hydroxy coumarin/1,3 diones, aromatic aldehyde, and secondary amine for the synthesis of alpha-benzylamino coumarins and diketones in good yields has been reported. (c) 2012 Elsevier Ltd. All rights reserved.