A highly enantio- and diastereoselective direct aldol reaction in aqueous medium catalyzed by thiazolidine-based compounds
作者:Raoní Scheibler Rambo、Caroline Gross Jacoby、Tiago Lima da Silva、Paulo Henrique Schneider
DOI:10.1016/j.tetasy.2015.04.010
日期:2015.7
enantiopure thiazolidine-based organocatalysts were prepared using a simple synthetic approach and successfully applied in the asymmetric direct aldol reaction between various cyclic ketones and aldehydes in a saturated aqueous medium. The aldol adducts were obtained with excellent enantioselectivity (up to >99% ee) and diastereoselectivity (dr >20:1).
服用左旋氨基酸作为起始原料,一组新的对映体纯的基于噻唑烷的有机催化剂的使用简单的合成方法制备,并且在各种环状酮和醛之间在饱和含水介质中的非对称直接aldol反应成功应用。具有优异的对映选择性(高达> 99%ee)和非对映选择性(2:1博士> 20),得到羟醛加合物。