Kinetic resolution of racemic alcohols catalyzed by minimal artificial acylases derived from l-histidine
作者:Yuji Kosugi、Matsujiro Akakura、Kazuaki Ishihara
DOI:10.1016/j.tet.2007.02.020
日期:2007.7
6-triisopropylbenzenesulfonyl)-l-histidinol, are simple and small molecules, which contain only one chiral carbon center that originates from natural l-histidine. Asymmetric acylation of racemic secondary alcohols with isobutyric anhydride induced by these artificial acylases gave optically active isobutyrates and optically active alcohols with an S(kfast-reacting enantiomer/kslow-reacting enantiomer) value of
N(π)-甲基-N(α)-(2,4,6-三异丙基苯磺酰基)-1-组氨醇的人工酰基转移酶,叔丁基二苯基甲硅烷基醚和三(三甲基甲硅烷基)甲硅烷基醚是简单小分子,它们含有只有一个手性碳中心源自天然的L-组氨酸。由这些人工酰基纤维素诱导的外消旋仲醇与异丁酸酐的不对称酰化得到旋光性异丁酸酯和旋光性醇与S(k快速反应对映异构体/ k慢反应对映异构体值高达132。催化剂的磺酰胺基与底物之间的一种氢键相互作用对于通过催化不对称酰化诱导高水平的动力学拆分至关重要。此外,开发了一种可重复使用的与聚苯乙烯结合的人工酰基转移酶以检验其实用性。