Syntheses of β-lactams from acetic acids and imines induced by phenyl dichlorophosphate reagent
作者:Ana Arrieta、Fernando P. Cossio、Claudio Palomo
DOI:10.1016/s0040-4020(01)96484-1
日期:——
Among the reagents known to produce β-lactams from imines and acetic acids, only phenyl dichlorophosphate and 1-methyl-2-chloropyridinium iodide are suitable for the synthesis of vinylamino- β-lactams. Reaction of acetic acids with ethanolimine derivatives promoted by phenyl dichlorophosphate affords oxazolidines instead β-lactams. Protection of the hydroxyl group as the trimethylsilyl ether in the
描述了从丹尼盐和席夫碱制备乙烯基氨基-β-内酰胺的实用方法的开发。在已知可从亚胺和乙酸生产β-内酰胺的试剂中,只有苯基二氯磷酸酯和1-甲基-2-氯吡啶碘代碘适合用于合成乙烯基氨基-β-内酰胺。乙酸与由二氯磷酸苯酯促进的乙醇亚胺衍生物反应生成恶唑烷,而不是β-内酰胺。在起始席夫碱中保护羟基作为三甲基甲硅烷基醚提供了通往相应的β-内酰胺而不是恶唑烷的便利途径。对该方法的范围进行了一些观察。