Steroids and sex hormones. Part 262. The radical induced stannane reduction of selenoesters and selenocarbonates: A new method for the degradation of carboxylic acids to nor-alkanes and for desoxygenation of alcohols to alkanes
Esters of carboselenoic acids, formed from carboxylicacids by conventional methods, undergo reaction with tributyltin hydride in inert aromatic solvents, either by heating to give the corresponding aldehyde or the corresponding alkane depending on reaction temperature and the structure of the parent carboxylicacid, or by ultraviolet irradiation at ambient temperature when the aldehyde is formed predominantly
STAT3 Inhibitory Activity of Structurally Simplified Withaferin A Analogues
作者:Teruyuki Tahara、Ursula Streit、Henry E. Pelish、Matthew D. Shair
DOI:10.1021/acs.orglett.7b00332
日期:2017.4.7
other human diseases. The withanolide family natural product withaferin A (1) inhibits STAT3 activation. We designed, synthesized, and evaluated simplified withanolide analogues SLW1 (3) and SLW2 (4), and found that SLW1 retained the STAT3 inhibitory activity of withaferin A.
PROGESTERONE RECEPTOR ANTAGONISTS AND USES THEREOF
申请人:Rafestin-Oblin Marie-Edith
公开号:US20130203718A1
公开(公告)日:2013-08-08
The present invention relates to a compound of formula (I): for its use as progesterone receptor antagonist, in particular for its use for the prevention and/or the treatment of cancer or uterine pathologies.
Synthetic steroids. Part VIII. The preparation of 3β,18-dihydroxy-androst-5-en-17-one and its conversion into 3β-hydroxy-18-nor-13α-androst-5-en-17-one
作者:P. J. Sykes、R. W. Kelly
DOI:10.1039/j39680002913
日期:——
The partial synthesis of 3β,18-dihydroxyandrost-5-en-17-one from 3β-acetoxypregn-5-en-20-one is described by way of 3β-acetoxy-18-hydroxypregn-5-en-20-one hemiketal. The conversion of 3β,18-dihydroxyandrost-5-en-17-one into 3β-hydroxy-18-nor-13α-androst-5-en-17-one by pyrolysis or by treatment with base is described. No 18-nor-dehydroepiandosterone was isolated by the route here described.