Synthesis and Characterization of Monosaccharide Derivatives and Application of Sugar-Based Prolinamides in Asymmetric Synthesis
作者:Jyoti Agarwal、Rama Krishna Peddinti
DOI:10.1002/ejoc.201200522
日期:2012.11
were converted into the corresponding prolinamide organocatalysts (i.e., 1a, 2a, 3a, and 3b) in high yields. The catalytic activity of these sugar-based prolinamide organocatalysts was demonstrated in asymmetric aldol reactions in various solvents and at different temperatures. The oraganocatalyst 3a was shown to be an efficient and powerful organocatalyst for the enantioselective aldol reaction of various
首次合成、分离和使用N-乙酰氨基葡萄糖衍生物甲基2-乙酰氨基-3,4,6-三-O-苄基-2-脱氧-β-D-吡喃葡萄糖苷(9b)的β-异头体用于合成糖基伯胺4b。糖基伯胺 5a、一对单糖衍生物 6a 和 6b 以及所有这些化合物的前体也被合成、分离并通过标准光谱方法进行了充分研究,包括 1H-1H COZY 和 HSQC 等 2D NMR 光谱实验. 然后将糖基伯胺 4a、5a、6a 和 6b 以高产率转化为相应的脯氨酰胺有机催化剂(即 1a、2a、3a 和 3b)。这些糖基脯氨酰胺有机催化剂的催化活性在各种溶剂和不同温度下的不对称羟醛反应中得到证明。