EPOXIDATTON OF ALKENES WITH MOLECULAR OXYGEN AND ISOBUTYRALDEHYDE CATALYZED BY IMMOBILIZED VITAMIN B_(12)WITHIN Al-MCM-41

摘要

Vit-B_(12)/Al-MCM-41 catalyzed successfully the epoxidation either of cis or trans-stilbene with O2 as oxidant and isobutyraldehyde as co-reductant with 86-98% reactivity and 97-100% selectivity.Other olefins such as norbornene and styrene undergo epoxidation reaction under similar conditions with good to fair selectivity.Details of the reactions will be presented in this article.