One-pot two-step chemoenzymatic deracemization of allylic alcohols using laccases and alcohol dehydrogenases
作者:Jesús Albarrán-Velo、Vicente Gotor-Fernández、Iván Lavandera
DOI:10.1016/j.mcat.2020.111087
日期:2020.9
of enantioenriched (hetero)aromatic secondary allylic alcohols has been synthesized through deracemization of the corresponding racemic mixtures combining a non-selective chemoenzymatic oxidation (laccase from Trametes versicolor and oxy-radical TEMPO) and a stereoselective biocatalyzed reduction (lyophilized cells of E. coli overexpressing an alcohol dehydrogenase, ADH). Both steps were performed in
通过将相应的外消旋混合物脱除油,合成了一系列对映体富集的(杂)芳族仲烯丙醇,结合了非选择性化学酶氧化(来自Trametes versicolor和氧自由基TEMPO的漆酶)和立体选择性生物催化还原(E.冻干细胞)。大肠杆菌过表达酒精脱氢酶(ADH)。这两个步骤均在水性介质中在非常温和的反应条件下进行。优化后,建立了一个顺序的一锅两步操作方案,以中等到高的转化率(48-95%)和对映体过量(65-> 99%ee)获得了相应的手性醇)。根据ADH立体偏好,即使是在制备规模下(119-178 mg),也可以直接方法从这些有价值的手性合成子中制备两种对映体。