Chemoenzymatic enantioselective route to get (+) and (−) 4-acetoxy-azetidin-2-one by lipase-catalysed kinetic resolution and their applications
作者:Giulia Martelli、Martina Cirillo、Valentina Giraldi、Daria Giacomini
DOI:10.1016/j.bioorg.2021.105580
日期:2022.3
active β-lactam compounds. However, it is available as a racemic mixture that could limit its application in the synthesis of enantiopure products. Herein we evaluated the use of lipases in a kinetic resolution (KR) process to finally obtain 4-acetoxy-zetidin-2-one as separated pure enantiomers. From a preliminary screening on a set of commercial enzymes, Pseudomonas fluorescens emerged as the most
4-Acetoxy-azetidin-2-one 是一种非常有用的中间体,广泛用于合成多种具有生物活性的β-内酰胺化合物。然而,它可以作为外消旋混合物使用,这可能会限制其在对映体纯产品合成中的应用。在这里,我们评估了脂肪酶在动力学拆分 (KR) 过程中的使用,以最终获得 4-acetoxy-zetidin-2-one 作为分离的纯对映异构体。从对一组商业酶的初步筛选中,荧光假单胞菌成为最合适的脂肪酶,可以获得良好的转化率和出色的对映体过量。在对映体纯的 4-acetoxy-azetidin-2-ones 上,一些亲核取代和N测试了硫代烷基化反应以评估 C-4 位的立体化学完整性。