Crystallization features and spontaneous resolution of 3-(2,6-dimethoxyphenoxy)propane-1,2-diol: The case of stable conglomerate and metastable solid solution
作者:Alexander A. Bredikhin、Zemfira A. Bredikhina、Olga A. Antonovich、Dmitry V. Zakharychev、Dmitry B. Krivolapov
DOI:10.1016/j.molstruc.2017.05.091
日期:2017.9
X-ray diffraction, and DSC methods. Racemic diol 1 prone to spontaneous resolution and has been resolved into (S)- and (R)-enantiomers by a preferential crystallization procedure. Separation takes place, but it gives crystalline precipitates with moderate (60–70%) enantiomeric excess values. The plausible reason is the formation of metastable phase of solid solution during the crystallization.
摘要 通过红外光谱、X 射线衍射和 DSC 方法研究了 3-(2,6-二甲氧基苯氧基)丙烷-1,2-二醇 1 的相行为。外消旋二醇 1 易于自发拆分,并已通过优先结晶程序拆分为 (S)- 和 (R)- 对映异构体。发生分离,但会产生具有中等 (60–70%) 对映体过量值的结晶沉淀物。可能的原因是在结晶过程中形成了固溶体的亚稳态相。