Epoxidation of olefins using cis-dioxomolybdenum complexes as catalysts
作者:D.D. Agarwal
DOI:10.1016/0304-5102(88)80078-6
日期:1988.2
Cis-dioxomolybdenum complexes, having tetradentate and tridentate ligands, as catalyst with t-butylhydroperoxide gave epoxides from olefins in good yield. The catalysts, except MoO2(apac), have been found to withstand the oxidative conditions. The steric environment due to the ligand around the metal center plays a significant role in the epoxidation of substituted olefins, viz., isoprene and 1,2-dimethyl-1
relative rates of epoxidation of cyclo-olefins exhibit the order norbornene > cyclooctene > cycloheptene > cyclohexene > cyclopentene. The addition of pyridine was found to increase the yield of epoxide. The addition of NaH2PO4 and NaHCO3 also increases the yield of the epoxide; the addition of cetyltrimethylammonium bromide completely inhibits the epoxidation, while addition of sodium lauryl sulphate slightly