Highly Efficient Small Organic Molecules for Enantioselective Direct Aldol Reaction in Organic and Aqueous Media
作者:Monika Raj Vishnumaya、Vinod K. Singh
DOI:10.1021/jo900548f
日期:2009.6.5
A series of highly efficient organocatalysts have been derived from naturally available amino acids for carrying out enantioselective direct aldol reaction in both organic and aqueous medium. The aldol products were obtained in high diastereoselectivities (up to 99:1) and enantioselectivities (up to >99% ee) for a broader range of substrates using 1 mol % of a catalyst. The results demonstrate that
已经从天然可用的氨基酸衍生出了一系列高效的有机催化剂,用于在有机和水性介质中进行对映选择性的直接羟醛反应。使用1 mol%的催化剂,可以在更大范围的底物上以高非对映选择性(最高99:1)和对映选择性(最高> 99%ee)获得醛醇产物。结果表明,有机催化剂的结构特征对于在水性介质中获得高光学纯度的醛醇加合物具有至关重要的作用。此外,已经说明了水在增加反应速率和对映选择性中的作用。而且,醛醇缩合产物已被用于手性氨基醇的合成中,手性氨基醇用作建立复杂的天然产物的有用的中间体。