Asymmetric Synthesis of Optically Pure Pharmacologically Relevant Amines Employing ω-Transaminases
作者:Dominik Koszelewski、Iván Lavandera、Dorina Clay、David Rozzell、Wolfgang Kroutil
DOI:10.1002/adsc.200800496
日期:——
ω-transaminases were tested for the synthesis of enantiomerically pure amines from the corresponding ketones employing D- or L-alanine as amino donor and lactate dehydrogenase to remove the side-product pyruvate to shift the unfavourable reaction equilibrium to the product side. Both enantiomers, (R)- and (S)-amines, could be prepared with up to 99% ee and >99% conversions within 24 h at 50 mM substrate concentration
测试了各种ω-转氨酶,以D-或L-丙氨酸为氨基供体和乳酸脱氢酶从相应的酮合成对映体纯的胺,以除去副产物丙酮酸,从而将不利的反应平衡转移至产物侧。(R)-和(S)-胺这两种对映异构体均可以在50 mM底物浓度下于24小时内以高达99%ee和> 99%的转化率制备。胺化反应的活性和立体选择性取决于所用的ω-转氨酶和底物。此外,助溶剂显着影响转氨酶的立体选择性和活性。通过使用ATA-117获得(R对映体和ATA-113或ATA-103,以15%v v -1 DMSO进入(S)对映体。