作者:Pilar Hoyos、María Fernández、José Vicente Sinisterra、Andrés R. Alcántara
DOI:10.1021/jo061060b
日期:2006.9.1
The synthesis of some noncommercial racemic 1,2-diaryl-2-hydroxyethanones (benzoins) is described, optimizing the previously reported methodologies. In a further step, the kinetic resolution of these substrates is reported, obtaining conversions of around 50% and eep higher than 99% in very short reaction times. As enzymatic catalyst, after screening of several enzymes, the lipase TL (from Pseudomonas
描述了一些非商业外消旋的1,2-二芳基-2-羟基乙酮(苯偶姻)的合成,优化了先前报道的方法。在进一步的步骤中,报告了这些底物的动力学拆分,在非常短的反应时间内获得了约50%的转化率和ee p高于99%。作为酶催化剂,在筛选了几种酶之后,脂酶TL(得自Pseudomonas stutzeri)是最有效的,它在log P极低的有机溶剂中工作值,例如THF。最后,首次描述了使用脂肪酶-钌催化的酯交换反应在有机溶剂中不同苯偶姻的动态动力学拆分,在所有情况下均获得高达90%的转化率,同时保持了优异的对映选择性。