作者:Vincent Gauchot、Julien Gravel、Andreea R. Schmitzer
DOI:10.1002/ejoc.201201068
日期:2012.11
We describe the application of a chiral catalytic imidazolium salt derived from trans-L-hydroxyproline, the anion being the catalytic entity, as a catalyst for the asymmetric Michael addition. We report the first example of a catalytic Michael addition using this type of catalyst, leading to excellent yields (up to 99 %) and good selectivities (up to 99:1 dr, up to 82 % ee).
我们描述了衍生自反式-L-羟脯氨酸的手性催化咪唑盐的应用,阴离子是催化实体,作为不对称迈克尔加成的催化剂。我们报告了使用此类催化剂的催化迈克尔加成的第一个例子,导致优异的产率(高达 99%)和良好的选择性(高达 99:1 dr,高达 82% ee)。