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 enantiomerenrichment was observed (>99%ee), while the ee of
Amides are important intermediates and building blocks in organic synthesis. Among the known preparation procedures, aminocarbonylation is an interesting and powerful tool. However, most of the studies were focused on noble metal-catalyzed synthesis of aromatic amides. Herein, we describe an attractive copper-catalyzed synthesis of aliphatic amidesfrom alkanes and amines. A variety of amides were