Enhanced Activity and Stereoselectivity of Polystyrene-Supported Proline-Based Organic Catalysts for Direct Asymmetric Aldol Reaction in Water
作者:Michelangelo Gruttadauria、Anna Maria Pia Salvo、Francesco Giacalone、Paola Agrigento、Renato Noto
DOI:10.1002/ejoc.200900829
日期:2009.11
and a prolinamide derivative were prepared by thiol–ene coupling. These materials were used as catalysts for the direct asymmetric aldol reaction in water, and results compared with unsupported catalysts in water. Such an approach gave more active or stereoselective catalysts compared to the unsupported compounds, showing that our immobilization procedure may be useful to develop catalytic materials
通过硫醇-烯偶联制备了几种聚苯乙烯支持的脯氨酸二肽和脯氨酰胺衍生物。这些材料被用作水中直接不对称羟醛反应的催化剂,并将结果与水中未负载的催化剂进行比较。与未负载的化合物相比,这种方法提供了更具活性或立体选择性的催化剂,表明我们的固定程序可能有助于开发具有增强性能的催化材料。此外,这些催化剂可以回收和重复使用至少九次而不会损失活性,或者当它们的活性降低时可以很容易地再生。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)