Non-aqueous iminium salt mediated catalytic asymmetric epoxidation
作者:Philip C. Bulman Page、Benjamin R. Buckley、David Barros、A. John Blacker、Harry Heaney、Brian A. Marples
DOI:10.1016/j.tet.2005.10.084
日期:2006.7
A range of substituted dihydroisoquinolinium salts has been tested in the catalyticasymmetricepoxidation of simple alkenes using our newly developed non-aqueous conditions employing tetraphenylphosphonium monoperoxysulfate (TPPP) as oxidant, giving ees of up to 97%.
Binaphthalene-Derived Iminium Salt Catalysts for Highly Enantioselective Asymmetric Epoxidation
作者:Philip C. Bulman Page、Benjamin R. Buckley、Mohamed M. Farah、A. John Blacker
DOI:10.1002/ejoc.200900252
日期:2009.7
catalysts for asymmetric epoxidation has received considerable attention. In this manuscript we describe the design, preparation, and use of new highly selective iminiumsaltorganocatalysts for asymmetric epoxidation, based around a chiral binaphthalene motif coupled with a chiral substituted dioxane moiety. The new catalysts have been tested in the catalytic asymmetric epoxidation of unfunctionalized
[EN] PROCESS FOR USE IN THE PREPARATION OF OXIRANES FROM ALKENES, AND CATALYSTS FOR USE THEREIN<br/>[FR] PROCEDE DESTINE A ETRE UTILISE DANS LA PREPARATION D'OXYRANES A PARTIR D'ALCENES ET CATALYSEURS UTILISES A CET EFFET