ON THE OZONIZATION OF CHOLESTEROL 3-ACYL ESTERS IN PROTIC MEDIA

The structures of cholesterol 3 beta-acyl ester ozonides formed by rea ction with ozone in participating alcoholic solvents are established b y proton and carbon-13 spectra as a 3 beta-acyloxy-7 alpha-alkoxy-(5R, 7R)-5 alpha-B-homo-6-oxacholestane-5-hydroperoxides (7a, 7b), and that of the dimeric cholesterol ozonide formed in nonparticipating solvent s with cholesterol acting as alcohol is established as 7 alpha-cholest -5'-en-3'-yloxy-3 beta-hydroxy-(5R,7R)-5 alpha-B-homo-6-oxacholestane -5-hydroperoxide (7c).