Effective Asymmetric Epoxidation of Styrenes by Chiral Dioxirane
摘要:
High enantio selectivity (80-92% enantiomeric excess (ee)) has been obtained for the epoxidation of various styrenes using an easily prepared ketone (4) catalyst.
Effective Asymmetric Epoxidation of Styrenes by Chiral Dioxirane
作者:David Goeddel、Lianhe Shu、Yi Yuan、O. Andrea Wong、Bin Wang、Yian Shi
DOI:10.1021/jo0520285
日期:2006.2.1
High enantio selectivity (80-92% enantiomeric excess (ee)) has been obtained for the epoxidation of various styrenes using an easily prepared ketone (4) catalyst.
Asymmetric Epoxidation of 1,1-Disubstituted Terminal Olefins by Chiral Dioxirane via a Planar-like Transition State
作者:Bin Wang、O. Andrea Wong、Mei-Xin Zhao、Yian Shi
DOI:10.1021/jo801576k
日期:2008.12.19
Various 1,1-disubstituted terminalolefins have been investigated for asymmetric epoxidation using chiral ketone catalysts. Up to 88% ee has been achieved with a lactam ketone, and a planar transition state is likely to be a major reaction pathway.