Synthesis of 4-phosphono-β-lactams via phosphite addition to acyliminium salts
作者:Christian V. Stevens、Wannes Vekemans、Kristof Moonen、Thomas Rammeloo
DOI:10.1016/s0040-4039(03)00005-4
日期:2003.2
4-Aryl-4-phosphono-beta-lactams are prepared by acylation of iminium salts with chloroacetyl chloride followed by phosphite addition and ring closure using sodium hydride as a base. Deacylation of the iminium salt is in competition with the desired addition of phosphites to acyliminium salts, which lowers the yield of the reaction. (C) 2003 Elsevier Science Ltd. All rights reserved.