Tetracyclic Triterpenes. Part 5. The Synthesis of Epimeric 9,11-Epoxides in the Tri-, Hexa-, and Octa-Norlanostane Series

Article abstract of DOI:10.1007/BF00903668

Lanosterol was converted by degradation of the side chain followed by transformations within rings B and C into a series of 9,11-epoxy-7-oxo-4,4,14α-trimethylsteroids. - Keywords: Stereochemistry of epoxidation; Steroidal 9,11-epoxides; 4.4.14α-Trimethylsteroids