A Convenient Synthesis of 5,6β-Epoxides of Some Cholesteryl Esters and Δ5-Ketosteroid Derivatives by Catalytic β-Stereoselective Epoxidation

Article abstract of DOI:10.1055/s-1989-27261

The epoxidation of a series of cholesteryl esters by air in the presence of a catalytic amount of a ruthenium tetramesitylporphyrin complex is described.The preparative procedure, which requires only 4 to 5 mol percent of the catalyst, leads to high conve