A Class of C2 and Pseudo C2 Symmetric Ketone Catalysts for Asymmetric Epoxidation. Conformational Effect on Catalysis
摘要:
A class of C-2 and pseudo C-2 symmetric ketones with one fused ring at each side of the carbonyl group have been prepared from quinic acid and found to be effective catalysts for the asymmetric epoxidation of a variety of olefins. Electron deficient olefins such as enones can be efficiently epoxidized. Encouragingly good enantioselectivity is also obtained for the epoxidation of styrenes. The studies show that the ketone conformation plays an important role in the reactivity and selectivity of the catalyst.
A compound and method for producing an enantiomerically enriched epoxide from an olefin using a chiral ketone and an oxidizing agent is disclosed.
一种化合物及其生产方法被披露,该方法使用手性酮和氧化剂从烯烃生产具有对映体富集的环氧乙烷。
A New Type of Ketone Catalyst for Asymmetric Epoxidation
作者:Zhi-Xian Wang、Yian Shi
DOI:10.1021/jo971701q
日期:1997.12.1
A Class of <i>C</i><i><sub>2</sub></i> and Pseudo <i>C</i><i><sub>2</sub></i> Symmetric Ketone Catalysts for Asymmetric Epoxidation. Conformational Effect on Catalysis
作者:Zhi-Xian Wang、Susie M. Miller、Oren P. Anderson、Yian Shi
DOI:10.1021/jo9908849
日期:1999.8.1
A class of C-2 and pseudo C-2 symmetric ketones with one fused ring at each side of the carbonyl group have been prepared from quinic acid and found to be effective catalysts for the asymmetric epoxidation of a variety of olefins. Electron deficient olefins such as enones can be efficiently epoxidized. Encouragingly good enantioselectivity is also obtained for the epoxidation of styrenes. The studies show that the ketone conformation plays an important role in the reactivity and selectivity of the catalyst.