摘要:
Various N-tosyl arylimines reacted with methyl vinyl ketone and ethyl vinyl ketone in the presence of ion-supported Ph3P A and B to give adducts, N-(2'-methylene-3'-oxo-1'-arylbutyl)-4-methylbenzenesulfonamides and N-(2'-methylene-3'-oxo-1'-arylpentyl)-4-methylbenzenesulfonamides, respectively, in good yields with high purity by simple diethyl ether extraction of the reaction mixture. Moreover, ion-supported Ph3P A and B could be repeatedly used for the same reaction to provide the corresponding adducts while maintaining good yields with high purity. (C) 2012 Elsevier Ltd. All rights reserved.