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.
A practical synthesis of N-aryl-substituted oxazolidinone-containing ketone catalysts for asymmetric epoxidation
作者:Mei-Xin Zhao、David Goeddel、Kai Li、Yian Shi
DOI:10.1016/j.tet.2006.06.020
日期:2006.8
N-Aryl-substituted oxazolidinone-containing ketonecatalysts for the asymmetricepoxidation of olefins can be efficiently prepared from d-glucose and anilines.
可以由d-葡萄糖和苯胺有效地制备用于烯烃的不对称环氧化的含N-芳基取代的含恶唑烷酮的酮催化剂。
Asymmetric Epoxidation Catalyzed by N-Aryl-Substituted Oxazolidinone-Containing Ketones: Further Evidence for Electronic Effects
作者:Lianhe Shu、Pingzhen Wang、Yonghong Gan、Yian Shi
DOI:10.1021/ol020229e
日期:2003.2.1
[GRAPHICS]Ketones containing N-aryl-substituted oxazolidinones have been prepared and investigated for the epoxidation of cis-beta-methylstyrene, styrene, and 1-phenylcyclohexene. The attractive interaction between the phenyl group of the olefin and the oxazolidinone of the catalyst is enhanced by introducing an electron-withdrawing group onto the N-phenyl group of the catalyst. The information obtained gives a better understanding of the ketone-catalyzed epoxidation. In addition, the easy preparation of some of the ketones makes them good candidates for practical use.
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.