Over the last decades biocatalysis has emerged as an indispensable and versatile tool for the asymmetric synthesis of active pharmaceutical ingredients (APIs). In this context, especially transaminases (TAs) have been successfully used for the preparation of numerous α‐chiral, optically pure amines, serving as important building blocks for APIs. Here we elaborate on the development of transaminases recognizing the α‐chiral centre adjacent to an aldehyde moiety with aliphatic residues, opening up concepts for novel synthetic routes to the antiepileptic drugs Brivaracetam and Pregabalin. The transformation proceeded via dynamic kinetic resolution (DKR) based on the bio‐induced racemisation of the aldehyde enantiomers, enabling the amination of the racemic substrates with quantitative conversions. Medium, substrate as well as enzyme engineering gave access to both (R)‐ and (S)‐enantiomers of the amine precursors of the stereocomplementary drugs in high optical purity, representing a short route to mentioned APIs.

中文翻译：

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通过动态动力学拆分α-手性脂肪醛的不对称胺化，以获取立体互补的Brivaracetam和Pregabalin前体

在过去的几十年中，生物催化已经成为活性药物成分（API）不对称合成的必不可少且用途广泛的工具。在这种情况下，尤其是转氨酶（TAs）已成功用于制备多种α-手性，光学纯胺，是API的重要组成部分。在这里，我们详细介绍了转氨酶的开发，该酶识别具有脂肪族残基的醛部分附近的α-手性中心，为抗癫痫药Brivaracetam和Pregabalin的新颖合成路线开辟了概念。转型通过动态动力学拆分（DKR）基于醛对映异构体的生物诱导外消旋作用，可实现外消旋底物的定量转化胺化。介质，底物和酶工程技术都可以以高光学纯度获得立体互补药物胺前体的（R）和（S）对映体。