Enantiocomplementary Chemoenzymatic Asymmetric Synthesis of (<i>R</i>)- and (<i>S</i>)-Chromanemethanol
作者:Michael Fuchs、Yolanda Simeo、Barbara T. Ueberbacher、Barbara Mautner、Thomas Netscher、Kurt Faber
DOI:10.1002/ejoc.200800950
日期:2009.2
route towards enantiopure (R)- and (S)-chromanemethanol (12), which are the key building blocks for the synthesis of stereoisomerically pure α-tocopherols, has been achieved by the biocatalytic resolution of a racemic 2,2-disubstituted oxirane using an epoxide hydrolase and a halohydrin dehalogenase, which exhibit opposite enantiopreferences. The introduction of chirality at an early stage of the synthesis
一种非脂肪酶的、对映互补的化学酶促途径,用于制备对映体纯的 (R)-和 (S)-色烷甲醇 (12),它们是合成立体异构纯 α-生育酚的关键构件,已通过生物催化拆分实现使用环氧化物水解酶和卤代醇脱卤酶的外消旋 2,2-二取代环氧乙烷,它们表现出相反的对映偏好。在合成的早期引入手性确保了高效率,使 (R)- 和 (S)-色满甲醇 (12) 的总总产率分别为 16% 和 26%。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)