Enantioselective Synthesis of α,α-Disubstituted Amino Acid Derivatives <i>via</i> Enzymatic Resolution: Preparation of a Thiazolyl-Substituted α-Methyl α-Benzyl Amine
作者:Denice M. Spero、Suresh R. Kapadia
DOI:10.1021/jo9610671
日期:1996.1.1
enantioselective synthesis of the (S)-alpha,alpha-disubstituted phenethylamine 1 via Lipase resolution of the esters 3 and 4 is described. The effect of pH, enzyme load, and solubilizing additives has been studied and optimized. Conversion of the carboxylic acid 10 to the desired thiazole 1 is accomplished in high overall yield via an intermediate oxazolinone 13. This facile process requires only a
描述了通过酯3和4的脂肪酶分解的(S)-α,α-二取代的苯乙胺1的新的和有效的对映选择性合成。已研究和优化了pH,酶负载和增溶剂的影响。经由中间体恶唑啉酮13以高的总收率实现羧酸10向所需噻唑1的转化。该简便的方法仅需要一个色谱步骤,并且制备了多克数量的1。