Biocatalytic Enantioselective Oxidation of
<i>Sec</i>
‐Allylic Alcohols with Flavin‐Dependent Oxidases
作者:Somayyeh Gandomkar、Etta Jost、Doris Loidolt、Alexander Swoboda、Mathias Pickl、Wael Elaily、Bastian Daniel、Marco W. Fraaije、Peter Macheroux、Wolfgang Kroutil
DOI:10.1002/adsc.201900921
日期:2019.11.19
oxidation of allylic alcohols is challenging to perform in a chemo- as well as stereo-selective fashion at the expense of molecular oxygen using conventional chemical protocols. Here, we report the identification of a library of flavin-dependent oxidases including variants of the berberine bridge enzyme (BBE) analogue from Arabidopsis thaliana (AtBBE15) and the 5-(hydroxymethyl)furfural oxidase (HMFO) and
使用常规化学方案,以化学和立体选择性方式进行烯丙基醇的氧化具有挑战性,而以分子氧为代价。在这里,我们报告的黄素依赖性氧化酶文库的鉴定,包括拟南芥(AtBBE15)和5-(羟甲基)糠醛氧化酶(HMFO)的小variant碱桥酶(BBE)类似物的变体及其变体(V465T,V465S ,V465T / W466H和V367R / W466F)用于仲烯丙基醇的对映选择性氧化。众所周知,伯醇和苄醇以及某些糖会被黄素依赖性氧化酶转化,但除单篇报道外,尚未对仲烯丙基醇进行研究。所研究的模型底物以动力学分辨率对映体被氧化,其E值高达> 200。例如HMFO V465S / T将(E)-oct-3-en-2-ol(1a)和(E)-4-苯基丁-3-en-2-ol的(S)-对映异构体氧化为E> 200得到的剩余(R)醇在50%的转化率下ee> 99%。如果介质工程需要通过添加助溶剂(例如二甲亚砜)来降低对映选择性。