Synthesis of cis-3,4-diaryl α-methylene-γ-butyrolactams via sonochemical Barbier-type reaction
作者:Adam Shih-Yuan Lee、Yu-Ting Chang
DOI:10.1016/j.tetlet.2010.05.057
日期:2010.7
A series of cis-3,4-diaryl alpha-methylene-gamma-butyrolactams were synthesized by the addition reaction of 3-phenylallyl bromide with N-tosyl aldimine via sonochemical Barbier-type reaction condition and then followed by the in situ intramolecular amidation. The cis-3,4-diaryl alpha-methylene-gamma-butyrolactam was obtained as the sole regio- and stereoisomeric product when N-tosyl aldimine was used as the substrate whereas the monoaryl alpha-methylene-gamma-butyrolactam was also generated when N-phenyl aldimine was used. (C) 2010 Elsevier Ltd. All rights reserved.