Preparation of β- and γ-lactams from carbamoyl radicals derived from oxime oxalate amides
作者:Eoin M. Scanlan、Alexandra M. Z. Slawin、John C. Walton
DOI:10.1039/b315223e
日期:——
synthetic route to oxime oxalate amides was developed and applied to the preparation of molecules incorporating N-benzyl-N-alkenyl amides linked with acetone oxime or benzaldoxime units. In addition, 2-substituted-thiazolidine-4-carboxylic acid methyl ester amides of oxalyl benzaldoxime were also prepared. It was shown by EPR spectroscopy that the oxalyl benzaldoxime amides dissociated to produce benziminyl
已开发了合成肟草酸酯酰胺的一般合成路线,并将其用于制备结合了与丙酮肟或苯甲醛肟单元连接的N-苄基-N-烯基酰胺的分子。另外,还制备了草酰苯并肟的2-取代的噻唑烷-4-羧酸甲基酯酰胺。EPR光谱表明,当用4-甲氧基苯乙酮作为光敏剂光解时,草酰苯甲醛肟酰胺解离产生苯并亚甲基和氨基甲酰基(氨基酰基)自由基。衍生自N-链-3-烯基肟草酸酯酰胺的氨基甲酸酯基团进行闭环反应,得到吡咯烷基-2-酮。类似的N-链-2-烯基前体提供了氮杂环丁烷-2-酮。环己烯基和肉桂酸肟草酸酯酰胺的反应分别得到双环β-内酰胺和3-苄基取代的β-内酰胺。有趣的是,两种产物都被分离为羟基化合物。如EPR光谱法所示,含有异丁烯基侧链的噻唑烷衍生的肟草酸酯酰胺也与相应的噻唑烷基-氨基甲酰基基团的产生解离。GC-MS证据表明,该自由基环化后可提供一些相应的青霉素衍生物