Synthesis of azetidines by electrophilic selenium-induced cyclization of homoallylic benzylamines
摘要:
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.
Synthesis of azetidines by electrophilic selenium-induced cyclization of homoallylic benzylamines
摘要:
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.
Regioselective synthesis of azetidines or pyrrolidines by selenium-induced cyclization of secondary homoallylic amines
作者:Xavier Franck、Stéphane Leleu、Francis Outurquin
DOI:10.1016/j.tetlet.2010.06.087
日期:2010.8
Azetidines or pyrrolidines can be regioselectively obtained by selenocyclization of homoallylic amines, according to the double bond substitution (C) 2010 Elsevier Ltd All rights reserved