作者:Andrew M. Davis、Michael I. Page
DOI:10.1039/c39850001702
日期:——
Penicilloic acid derivatives undergo two types of reversible thiazolidine ring opening reactions; in aqueous alkaline solution methyl benzylpenicilloate ring opens to give an enamine intermediate by a base-catalysed elimination process involving C-6-H whereas benzylpenicilloic acid epimerises at C-5 by unimolecular ring opening to form an intermediate iminium ion.
青霉酸衍生物经历两种类型的可逆噻唑烷开环反应:在碱性水溶液中,苄基青霉酸甲酯的开环通过涉及C-6-H的碱催化消除过程而得到烯胺中间体,而苄基青霉酸通过单分子的开环在C-5上差向异构化,从而形成中间体亚胺鎓离子。