[EN] NOVEL PHOSPHOROUS (V)-BASED REAGENTS, PROCESSES FOR THE PREPARATION THEREOF, AND THEIR USE IN MAKING STEREO-DEFINED ORGANOPHOSHOROUS (V) COMPOUNDS<br/>[FR] NOUVEAUX RÉACTIFS À BASE DE PHOSPHORE (V), LEURS PROCÉDÉS DE PRÉPARATION ET LEUR UTILISATION DANS LA FABRICATION DE COMPOSÉS ORGANOPHOSHOREUX (V) STÉRÉODÉFINIS
申请人:BRISTOL MYERS SQUIBB CO
公开号:WO2019200273A1
公开(公告)日:2019-10-17
The present invention relates to novel phosphorous (V) (P(V)) reagents, methods for preparing thereof, and methods for preparing organophosphorous (V) compounds by using the novel reagents.
In order to develop specific and sensitive immunoassays, new carboxylated derivatives of androstenedione, 11β-hydroxyandrostenedione, adrenosterone, progesterone, 17α-hydroxyprogesterone, corticosterone, 11-deoxycorticosterone and 21-deoxycortisol were synthesized. The preparation of the 4-carboxymethylthio and 4-carboxyethylthio derivatives of the Δ4-3-ketosteroids was carried out by base-catalyzed ring opening of the 4, 5-epoxides with mercaptoacetic acid and mercaptopropionic acid, respectively. The N-succinimidyl esters of these carboxylated steroids were also prepared.
Benign synthesis of fused-thiazoles with enone-based natural products and drugs for lead discovery
作者:Rawan Alnufaie、Mohamad Akbar Ali、Ibrahim S. Alkhaibari、Subrata Roy、Victor W. Day、Mohammad A. Alam
DOI:10.1039/d1nj00380a
日期:——
In an effort to synthesize a library of bioactive molecules, we present an efficient synthesis of fused-thiazole derivatives of natural products and approved drugs by using an environmentally usable solvent, acetic acid, and without any external reagent. Cholestenone, ethisterone, progesterone, and nootkatone-derived epoxyketones have been utilized to synthesize 50 novel compounds. The plausible mechanism
Fourteen novelsteroidal C-17 pyrazolinyl derivatives 9a–g and 10a–g were synthesized from commercially available progesterone and tested for their cytotoxic activity against brine shrimp (Artemia salina) and three human cancer cell lines (NCI-H460, HeLa, and HepG2). Some of these synthetic compounds exhibited significant cytotoxic activity, and treatment of HeLa cells with compound 10b resulted in
4-Amino-delta4-steroids and their use as 5alpha-reductase inhibitors
申请人:MERRELL PHARMACEUTICALS INC.
公开号:EP0469548A2
公开(公告)日:1992-02-05
The present invention relates to 4-amino-Δ4-steroids which are useful as inhibitors of 5a-reductase. The compounds are prepared by the reaction of an appropriate 4-azido steroid with triphenylphosphine in an aqueous inert solvent with heating.