1,4-Cycloadducts of various steroidal5,7-dienes and 4-phenyl-1-2-4-triazoline-3,5-dione gave a separable mixture (3 : 2) of the corresponding Δ5- and Δ7-sterols in good yield when treated with lithium dissolved in refluxing rthylamine.
Allylic oxidation of steroidal olefins by vanadyl acetylacetonate and tert-butyl hydroperoxide
作者:Wendell S. Grainger、Edward J. Parish
DOI:10.1016/j.steroids.2015.06.005
日期:2015.9
Readily available vanadyl acetylacetonate was found to oxidize the allylic sites of Δ(5) steroidal alcohols without protection of hydroxyl groups. Cholesterol, dehydroepiandrosterone, cholesterol benzoate, cholesterol acetate, pregnenolone, and 5-pregnen-3,20-diene were oxidized to 7-keto products using vanadyl acetylacetonate in one pot reactions at room temperature in the presence of oxygen and water
Sterol derivative compounds, structurally related to natural compounds which can be extracted from bull testes and from human follicular fluid, useful for regulating meiosis in oocytes and in male germ cells. Some of these compounds are useful in the treatment of infertility, whereas other compounds are useful as contraceptives.
Dehydro-estriol (8-DHE3) and dehydro-pregnanetriol (7-DHPT), and methods of their synthesis
申请人:——
公开号:US20030220314A1
公开(公告)日:2003-11-27
The invention provides isolated dehydro-estriol (8-DHE
3
) and dehydro-pregnanetriol (7-DHPT), and methods of their synthesis. These compounds are useful in diagnosis of Smith-Lemli-Optiz syndrome (SLOS).
Compounds of Formula I and methods of regulating the meiosis in a mammalian germ cell which method comprises administering an effective amount of the compound of Formula I to a germ cell in need of such a treatment.