Asymmetric 1,4-addition of β-keto esters to cyclic enones catalyzed by Ru amido complexes
作者:Hui Wang、Masahito Watanabe、Takao Ikariya
DOI:10.1016/j.tetlet.2004.12.026
日期:2005.2
Well-defined Ru amido complexes effected asymmetric Michael addition of beta-keto esters to 2-cyclopenten-l-one to give quantitatively the corresponding Michael adducts with excellent ee although with a 1:1 diastereomer ratio. The stereochemical outcome of the reaction was significantly influenced by the structures of the catalysts and the structures of the P-keto esters; the ee value reaching up to 97%. (C) 2004 Elsevier Ltd. All rights reserved.