Biomimetic transamination of α-keto perfluorocarboxylic esters. An efficient preparative synthesis of β,β,β-trifluoroalanine
作者:Vadim A Soloshonok、Valery P Kukhar
DOI:10.1016/s0040-4020(97)00517-6
日期:1997.6
An efficient large-scale preparative synthesis of biologically interesting β,β,β-trifluoroalanine through the biomimetic transamination of the ethyl trifluoropyruvate has been developed. The azomethine—azomethine isomerization of the N-(1-phenyl)ethylimine of ethyl trifluoropyruvate to the N-(1-phenyl)ethylidene alanine ethyl ester, a key stage of the process, was found to occur under the mild reaction
通过三氟丙酮酸乙酯的仿生转氨作用,已经开发了有效的大规模制备生物学上令人感兴趣的β,β,β-三氟丙氨酸的方法。所述的偶氮甲碱偶氮甲碱异构化ñ - (1-苯基)乙基三氟丙酮的乙亚胺到Ñ - (1-苯基)亚乙基丙氨酸乙酯,该方法的关键阶段,被发现在温和的反应条件下发生,在在室温下的三乙胺溶液。拟议的工作机理原理解释了异构化的容易程度及其立体化学结果,涉及从次甲基碳到烯醇氧的不寻常的非对称[1,5]质子转移。