Kinetic Resolution of <i>sec</i>
-Thiols by Enantioselective Oxidation with Rationally Engineered 5-(Hydroxymethyl)furfural Oxidase
作者:Mathias Pickl、Alexander Swoboda、Elvira Romero、Christoph K. Winkler、Claudia Binda、Andrea Mattevi、Kurt Faber、Marco W. Fraaije
DOI:10.1002/anie.201713189
日期:2018.3.5
Various flavoprotein oxidases were recently shown to oxidize primary thiols. Herein, this reactivity is extended to sec‐thiols by using structure‐guided engineering of 5‐(hydroxymethyl)furfural oxidase (HMFO). The variants obtained were employed for the oxidative kinetic resolution of racemic sec‐thiols, thus yielding the corresponding thioketones and nonreacted R‐configured thiols with excellent
最近显示各种黄素蛋白氧化酶可氧化伯硫醇。在这里,通过使用5-(羟甲基)糠醛氧化酶(HMFO)的结构指导工程,该反应性扩展至仲硫醇。得到的变体用于消旋外消旋仲硫醇的氧化动力学拆分,从而产生相应的硫酮和未反应的R构型硫醇,具有出色的对映选择性(E≥200)。所应用的工程策略超越了用较小的氨基酸取代大体积氨基酸残基的经典方法,因为活性位点被新引入的Thr残基进一步扩大了。该残基与底物建立了氢键相互作用,这在该变体的晶体结构中得到了验证。这些策略为一系列仲硫醇的对映选择性氧化解锁了HMFO变体。