作者:Andrew S. Kende、Philippe Delair、Benjamin E. Blass
DOI:10.1016/0040-4039(94)88260-6
日期:1994.10
Diphenylphosphinic anhydride and certain other organophosphorus electrophiles mediate the high-yield conversion of alkenes to epoxides by hydrogen peroxide in buffered aqueous tetrahydrofuran.
The reactivity of methyltrioxorhenium in the epoxidation of olefins can be tuned by the presence of Lewis bases as ligands of the metal center. Unfortunately, a large excess of ligand is usually required to obtain high yields and selectivities mainly because of the fluxionalbehaviour that these compounds show in solution. We describe here the microencapsulation technique that can resolve this problem