Glutathione Peroxidase from Mucor hiemalis

Asymmetric epoxidation of cyclic enones was performed with 9-alkylfluorenyl peroxides under two-phase conditions in the presence of novel phase transfer catalysts derived from cinchona alkaloids. The observed enantiomeric excess ranged between 30~63%, from which it is shown that the fluorenyl group had a remarkable effect on the enhancement of enantioselectivity.