Highly enantioselective Michael addition of cyclic ketones to chalcones catalyzed by pyrrolidine-based imides
作者:Hong-Yu Xie、Shu-Rong Ban、Ju-Na Liu、Qing-Shan Li
DOI:10.1016/j.tetlet.2012.05.106
日期:2012.7
An efficient procedure for asymmetric Michaeladdition reaction of cyclic ketones with low activated chalcones catalyzed by pyrrolidine-based phthalimide and 1,8-Naphthalimide catalysts was developed. The corresponding products were obtained in high yields with high diastereoselectivities (up to 99:1 dr) and high enantioselectivities (up to 96% ee) under mild conditions.
A chiral benzoylthiourea–pyrrolidine catalyst for the highly enantioselective Michael addition of ketones to chalcones
作者:Shu-rong Ban、Xi-xia Zhu、Zhi-ping Zhang、Qing-shan Li
DOI:10.1016/j.bmcl.2014.04.005
日期:2014.6
A benzoylthiourea–pyrrolidine catalyst was developed for the asymmetric Michaeladdition of ketones to chalcones. The corresponding products were obtained in high yields with high level of diastereoselectivities (up to 99:1 dr) and high level of enantioselectivities (up to 94% ee) under mild conditions.