Polyfunctional ()-2-hydroxycarboxylic acids by reduction of 2-oxo acids with hydrogen gas or formate and resting cells of proteus vulgaris
作者:Anita Schummer、Hongtao Yu、Helmut Simon
DOI:10.1016/s0040-4020(01)86506-6
日期:1991.11
Various ()-2-hydroxy acids such as ()-2-hydroxy-3-enoic-, 3,5-dienoic-, 4-oxo-, ()-3-hydroxy and some others were prepared on a scale up to 0.12 mol by biocatalytic reduction of the corresponding 2-oxo acids with P. vulgaris and hydrogen gas and/or formate as electron donors. With the exception of the 2-hydroxy-4-oxo acids it could be proved that the enantiomeric excess is > 97%. For the 4-oxo derivatives
各种()-2-羟基酸如()-2-羟基-3-烯酸,3,5-二烯酸,4-氧代,()-3-羟基等,其制备规模可达到通过以寻常的毕赤酵母和氢气和/或甲酸作为电子给体,对相应的2-氧代酸进行生物催化还原,可得到0.12摩尔。除2-羟基-4-氧代酸外,可以证明对映体过量> 97%。对于4-氧代衍生物,可以假定该对映体过量。分离出的产物的产率很高,因为它们是从相当少量的生物催化剂中分离出来的,并且缓冲液的浓度很低,获得的产物浓度在0.1–0.24 M的范围内。在15–20小时内形成1 mmol的产品,约20–40 mg(干重)寻常型毕赤酵母 单元格是必需的。