Abstract
Bromination of cholest-5-en-7-one and 3β-hydroxycholest-5-en-7-one benzoate with N-bromosuccinimide was carried out. Resulting bromo derivatives were converted to dienones, bromo-dienones, or anilino-dienones. The bromo-dienons were assigned 6-bromo-or 4-bromocholesta-3, 5-dien-7-one structure and their characteristic infrared absorptions were summarized. Epoxidation of cholesta-3, 5-dien-7-one was also examined.