Chemical Dynamic Thermodynamic Resolution and<i>S</i>/<i>R</i>Interconversion of Unprotected Unnatural Tailor-made α-Amino Acids
作者:Shuni Wang、Shengbin Zhou、Jiang Wang、Yong Nian、Aki Kawashima、Hiroki Moriwaki、José L. Aceña、Vadim A. Soloshonok、Hong Liu
DOI:10.1021/acs.joc.5b01292
日期:2015.10.16
Described here is an advanced, general method for purely chemical dynamic thermodynamic resolution and S/R interconversion of unprotected tailor-made α-amino acids (α-AAs) through intermediate formation of the corresponding nickel(II)-chelated Schiff bases. The method features virtually complete stereochemical outcome, broad substrate generality (35 examples), and operationally convenient conditions
本文介绍了一种高级的通用方法,可通过中间形成相应的镍(II)螯合的席夫碱,纯化学动态热力学拆分和未经保护的特制α-氨基酸(α-AAs)S / R互变。该方法具有几乎完整的立体化学结果,广泛的底物通用性(35个实例)以及操作方便的条件,可大规模制备对映体纯形式的目标α-AA。此外,新型的非可消旋的轴向手性配体可以定量回收和再利用,从而使整个过程在经济上和合成上都具有吸引力。