Hamari Chemicals Ltd. 1-4-29 Kunijima, Higashi-Yodogawa-ku, Osaka 533-0024 (Japan).
Angew Chem Int Ed Engl. 2014 Nov 3;53(45):12214-7. doi: 10.1002/anie.201407944. Epub 2014 Sep 22.
Reported herein is the first purely chemical method for the dynamic kinetic resolution (DKR) of unprotected racemic α-amino acids (α-AAs), a method which can rival the economic efficiency of the enzymatic reactions. The DKR reaction principle can be readily applied for S/R interconversions of α-AAs, the methodological versatility of which is unmatched by biocatalytic approaches. The presented process features a virtually complete stereochemical outcome, fully recyclable source of chirality, and operationally simple and convenient reaction conditions, thus allowing its ready scalability. A quite unique and novel mode of the thermodynamic control over the stereochemical outcome, including an exciting interplay between axial, helical, and central elements of chirality is proposed.
本文报道了首例纯化学动态动力学拆分(DKR)非保护外消旋α-氨基酸(α-AAs)的方法,该方法可与酶反应的经济性相媲美。DKR 反应原理可直接应用于α-AAs 的 S/R 互变,其方法的多功能性是生物催化方法无法比拟的。所提出的过程具有几乎完全的立体化学结果、可完全回收的手性源以及操作简单方便的反应条件,因此易于实现规模化。本文提出了一种对立体化学结果进行热力学控制的全新且独特的模式,包括手性的轴向、螺旋和中心元素之间的令人兴奋的相互作用。