Self-disproportionation of enantiomers of non-racemic chiral amine derivatives through achiral chromatography
作者:Tsuyoshi Nakamura、Kaori Tateishi、Shiori Tsukagoshi、Saori Hashimoto、Shotaro Watanabe、Vadim A. Soloshonok、José Luis Aceña、Osamu Kitagawa
DOI:10.1016/j.tet.2012.03.054
日期:2012.5
Efficient self-disproportionation of enantiomers of several non-racemic chiral amines was achieved through conversion to N-acetamides and subsequent MPLC using an achiral column. The MPLC of these non-racemic N-acetamide derivatives gave the chart having a clear boundary between two fractions. Thus, in the less polar fraction, remarkable enantiomer enrichment was observed (>99%ee), while the ee of
几种非外消旋手性胺的对映体的高效自歧化是通过转化为N-乙酰胺和随后使用非手性色谱柱进行的MPLC实现的。这些非外消旋N-乙酰胺衍生物的MPLC给出的图表在两个馏分之间具有清晰的边界。因此,在极性较小的馏分中,观察到显着的对映体富集(> 99%ee),而极性较大的馏分的ee显着降低。对映异构体富集和耗尽的幅度强烈取决于氨基上的取代基。