作者:Moustafa F. Aly、Ronald Grigg
DOI:10.1016/s0040-4020(01)86099-3
日期:1988.1
α-Imino acids, prepared from α-keto acids and primary amines, undergo facile decarboxylation to the corresponding imines on heating at ⩽,80°C in benzene or methylene chloride. Decarboxylation proceeds via a 1,2-ylide which can be trapped by sulphur to give the corresponding secondary thioamides in good yield. 1,2-Ylides from secondary amines and ∞-keto acids can be generated in situ and trapped with
由α-酮酸和伯胺制得的α-氨基酸在⩽80℃下于苯或二氯甲烷中加热时,容易脱羧成相应的亚胺。脱羧反应通过1,2-ylide进行,可以被硫捕获,从而以高收率得到相应的仲硫代酰胺。来自仲胺和∞-酮酸的1,2-内酯可以原位生成并用硫捕获,从而以优异的收率得到叔硫酰胺。