Synthesis of azetidines by electrophilic selenium-induced cyclization of homoallylic benzylamines
作者:Bénédicte Berthe、Francis Outurquin、Claude Paulmier
DOI:10.1016/s0040-4039(97)00028-2
日期:1997.2
Homoallyl benzylamines, prepared by allylation of the corresponding N-benzylimines, have been subjected to a selenium-induced cyclization under various conditions. At room temperature, the 4-exo and the 5-endo modes are competitive. In acetonitrile, the azetidine has been isolated as the major cyclization product, especially for homoallylamines derived from ketimines. With an excess of selenium reagent, 3-halopyrrolidines have been obtained. (C) 1997 Published by Elsevier Science Ltd.