Highly efficient bifunctional organocatalysts for the asymmetric Michael addition of ketones to nitroolefins
作者:Chuanming Yu、Jun Qiu、Fei Zheng、Weihui Zhong
DOI:10.1016/j.tetlet.2011.04.067
日期:2011.6
A type of secondary–secondary–tertiary triamine bifunctional organocatalysts have been properly designed and synthesized. In our study, the designed catalyst (S)-N-(pyrrolidin-2-ylmethyl)pyridin-2-amine 5 has been shown to be highly efficient to promote the asymmetric Michael addition of ketones to nitroolefins at room temperature, which afforded the corresponding adducts in excellent diastereoselectivities
已经正确设计和合成了一种类型的仲-仲-叔三胺双官能有机催化剂。在我们的研究中,已证明设计的催化剂(S)-N-(吡咯烷-2-基甲基)吡啶-2-胺5在室温下能高效促进酮向硝基烯烃的不对称迈克尔加成反应,从而提供了相应的加合物具有出色的非对映选择性(高达99:1 dr)和对映选择性(高达> 99%ee)。