A new method for the synthesis of N-protected β-amino-α-keto esters from fluoroalkanesulfonylazides and α-keto esters
作者:Shizheng Zhu、Guifang Jin、Yong Xu
DOI:10.1016/s0040-4020(03)00622-7
日期:2003.6
In the presence of a secondary amine, treatment of α-keto esters with fluoroalkanesulfonyl azides at room temperature afforded N-sulfonyl protected β-amino-α-keto esters in good to excellent yields. This reaction provided a novel, direct and convenient access to N-sulfonyl protected β-amino-α-keto esters from α-keto esters and fluoroalkanesulfonyl azides under mild conditions. However, the reaction
在仲胺的存在下,在室温下用氟代链烷磺酰基叠氮化物处理α-酮酯,得到良好收率的N-磺酰基保护的β-氨基-α-酮酯。该反应提供了在温和条件下从α-酮酯和氟代链烷磺酰基叠氮化物获得N-磺酰基保护的β-氨基-α-酮酯的新颖,直接和方便的途径。然而,氟代烷烃磺酰基叠氮化物与β-酮酯烯胺的反应提供了两种产物:N-氟代烷烃磺酰基am和重氮乙酸酯。讨论了反应机理。