Transformed steroids. 184. Pathways for the use of 17?-pregna-4,9-dien-3-on-17?-ol-20-yne in the synthesis of 9, 11-disubstituted pregnanes
摘要:
A study was carried out on pathways for the conversion of 17-alpha-pregna-4,9-dien-3-on-17-beta-ol-20-yne to 9-xi,11-xi-epoxypregn-4-en-17-alpha-ol-3-on-20-ynes and their DELTA-16- and 16-alpha,17-alpha-epoxy derivatives, which are valuable intermediates in reported schemes for the synthesis of corticosteroids.