La cyclopropanation des ethers d'enol trimethylsilyliques, mode de preparation des cyclopropanols et methode d'α-monomethylation des aldehydes et des cetones.
Compounds of the formulae: ##STR1## are useful as anti-cancer, anti-obesity, anti-diabetic, anti-coronary agents, anti-aging agents, anti-hypolipidemic agents and anti-autoimmune agents.
Steroide und Sexualhormone. 261. Mitteilung. Quassinoide Bitterstoffe II. Partialsynthetischer Zugang zu Quassin: �berf�hrung von Testosteron in eine Schl�sselverbindung mit angul�rer 8?-Methylgruppe
作者:Johannes Pfenninger、Walter Graf
DOI:10.1002/hlca.19800630625
日期:1980.9.17
Partial Synthesis of Quassin: Synthesis of a Key Intermediate with an Angular 8β-Methyl Group from Testosterone
[EN] AMINOOXIME DERIVATIVES OF 2- AND/OR 4-SUBSTITUTED ANDROSTANES AND ANDROSTENES AS MEDICAMENTS FOR CARDIOVASCULAR DISORDERS<br/>[FR] DÉRIVÉS D'AMINOOXIME D'ANDROSTANES ET ANDROSTÈNES 2- ET/OU 4-SUBSTITUÉS EN TANT QUE MÉDICAMENTS POUR DES TROUBLES CARDIOVASCULAIRES
申请人:SIGMA TAU IND FARMACEUTI
公开号:WO2009047101A1
公开(公告)日:2009-04-16
New aminooxime derivatives at position 3 of 2-and/or 4-substituted androstanes and androstenes, processes for their preparation, and to pharmaceutical compositions containing them for the treatment of cardiovascular disorders, such as heart failure and hypertension. In particular compounds having the general formula (I) are described,where the radicals have the meanings described in detail in the application.
2.alpha.-Cyano-3-oxosteroids having a 4.alpha.,5.alpha.-epoxy group and alkylated in the 4- and/or 6-position, useful as interceptive agents, are prepared by alkaline cleavage of the corresponding steroido[2,3-d]isoxazoles.
Acylation of steroidal saturated ketones and their enol acetates with acetic anhydride and BF3-etherate has been studied. α-Acylketones were obtained from 3-keto, 7-keto and 16-keto steroids (I, XII and IX) in the A/B trans series and from 3-ketone (VI) in the A/B cis series. The intermediate difluoroboron chelates (II and VII) were isolated and characterized. No C-acylation of tertiary carbon atom