Access to Enantiopure α-Alkyl-β-hydroxy Esters through Dynamic Kinetic Resolutions Employing Purified/Overexpressed Alcohol Dehydrogenases
作者:Aníbal Cuetos、Ana Rioz-Martínez、Fabricio R. Bisogno、Barbara Grischek、Iván Lavandera、Gonzalo de Gonzalo、Wolfgang Kroutil、Vicente Gotor
DOI:10.1002/adsc.201200139
日期:2012.6.18
and Ralstonia sp. (RasADH) could also accept bulkier keto esters (‘bulky‐bulky’ substrates). SyADH also provided preferentially syn‐(2R,3S) isomers and RasADH showed in some cases good selectivity towards the formation of anti‐(2S,3S) derivatives. With anti‐Prelog ADHs such as LBADH from L. brevis or LKADH from L. kefir, syn‐(2S,3R) alcohols were obtained with high conversions and diastereomeric excess
通过使用纯化或粗制的大肠杆菌过表达的醇脱氢酶(ADHs)的动态动力学拆分(DKR)获得α-烷基-β-羟基酯。ADH-A从R.曲霉,CPADH从近平滑念珠菌从和TesADH T. ethanolicus得到顺式- (2- [R,3小号)具有非常高的选择性为空间位不受阻碍酮(“小体积大的”底物)的衍生物,而的ADH来自S. yanoikuyae(SyADH)和Ralstonia sp。(RasADH)也可以接受更大的酮酯(“大块状”底物)。SyADH还提供了优先顺式- (2- ř,3 S)异构体和RasADH在某些情况下显示出对形成抗-(2 S,3 S)衍生物的良好选择性。与抗作为LBADH这样普雷洛格的ADH从短乳杆菌或从LKADH克菲尔乳杆菌,顺式- (2-小号,3 - [R )与高转化率和对映体过量在某些情况下,特别是与LBADH得到醇。此外,由于这些底物在热力学上有利于还原,因此可以仅