Asymmetric Epoxidation of α,β-Unsaturated Ketones Catalyzed by Chiral Polybinaphthyl Zinc Complexes: Greatly Enhanced Enantioselectivity by a Cooperation of the Catalytic Sites in a Polymer Chain (original) (raw)
The Journal of Organic Chemistry, 1999
Stanley Roberts
Qiao-sheng Hu
Lin Pu
Jie Tang
G. Zou
Xiaofan Zheng
Shigeru Arai
Qun Chen
Abstract
Polybinaphthyl zinc catalysts have been developed for the asymmetric epoxidation of α, β-unsaturated ketones in the presence of tert-butyl hydroperoxide. Up to 81% ee has been achieved for the epoxidation of α, β-unsaturated ketones containing β-aliphatic ...
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