o-halogenobenzyl-4-alkenyl-β-lactams can be prepared both in the racemic form and in optically pure form using the ketene–imine cyclization. These 2-azetidinone-tethered haloarenes were used for the regio- and stereoselective preparation of benzofused tricyclic β-lactams including benzocarbapenems and benzocarbacephems via intramolecular aryl radical cyclisation.
邻-卤代苯苯基-和邻卤代苄基-4-烯基-β-内酰胺可以通过烯酮-
亚胺环化以外消旋形式和光学纯形式制备。这些
2-氮杂环丁酮束缚的卤代
芳烃通过分子内芳基自由基环化用于区域选择性和立体选择性地制备包括苯并卡培南和苯并卡巴非的苯并稠合
三环β-内酰胺。