Self-disproportionation of enantiomers of α-trifluoromethyl lactic acid amides via sublimation
作者:Manabu Yasumoto、Hisanori Ueki、Vadim A. Soloshonok
DOI:10.1016/j.jfluchem.2009.11.010
日期:2010.4
subjected to sublimation under kinetic conditions (Petri dish in open air), the enantiomeric excess of the remainder has noticeably increased. On the other hand, the SDE of Bn amide derivative by sublimation resulted in almost no change in the optical purity of the remainder. These preliminary results on the SDE of the compounds under study, as well as their excellent chemical and physico-chemical characteristics
已经开发了外消旋和对映体富集的α-三氟甲基乳酸酰胺[NHPh,NH(4-Cl-C 6 H 5),NHBn,NH t -Bu ]衍生物的制备。发现Ph,4-Cl-C 6 H 5和叔-Bu衍生物通过升华具有相当大的对映体自歧化度(SDE)。例如,当光学富集的Ph,4-Cl-C 6 H 5和叔-Bu酰胺衍生物在动力学条件下(露天培养皿)升华,剩余的对映体过量显着增加。另一方面,通过升华的Bn酰胺衍生物的SDE几乎没有改变其余部分的光学纯度。对所研究化合物的SDE的这些初步结果,以及其优异的化学和物理化学特性,使得这些酰胺衍生物易于获得,并且对于通过升华进行SDE的系统研究而言,是非常有前途的底物。