Complexes of secondary amines with borane, R2NH·BH3, surpass sodium borohydride as reducing agents for saturated and unsaturated steroidal 3-, 12-, 17-, and 20-ketones as regards chemo- and regioselectivity and mildness of the reaction conditions. In the case of 12-ketones, stereoselectivity is also improved.
19-Nor-Δ4-3-oxosteroid (IX) was synthesized starting from 3α, 5α-cyclo-6β, 19-oxidosteroid (I) through 3β-substituted-Δ5-steroid-19-oic acid (VII), whose synthesis was achieved by the three methods : i) Hydrolysis of 3β-hydroxy-Δ5-steroid-19-oic acid 3, 19-lactone (VI) which was prepared by oxidizing either 3β, 19-dihydroxy-Δ5-steroid (III) or 3β-hydroxy-19-oxo-Δ5-steroid (V) with Jones reagent or Oppenauer reaction, ii) Oxidation of 3β, 19-dihydroxy-Δ5-steroid 3-acetate (III) with the excess Jones reagent, iii) Reduction of 3α, 5α-cyclo-6-oxo-19-oic acid (IV) with sodium borohydride and subsequent acid-catalysed solvolysis of a mixture of resultant 6-epimeric hydroxy acids (XIII and XIV) in a suitable solvent. 3β-Substituted-Δ5-steroid-19-oic acid (VII) was in turn converted to 19-nor-Δ4-3-oxosteroid (IX) in two ways : i) Oxidation of 3β-hydroxy compound and subsequent acid-treatment of the resultant Δ5-3- oxosteroid-19-oic acid (VIII), ii) Pyrolysis of the 3β-acetoxy-Δ5-steroid-19-oic acid (VII) to afford 3β-acetoxy-Δ5 (10)-steroid (XI), followed by alkaline hydrolysis, Jones oxidation, and acid-treatment, successively.
A variety of bone anabolic compounds are useful for maintaining and/or increasing bone mass, density, and/or strength in mammals. Preferred compounds enhance bone anabolic activity while minimizing or eliminating undesirable feminizing or masculinizing effects.
PRODRUGS OF THE SELECTIVE PROGESTERONE RECEPTOR MODULATOR (SPRM) (11.BETA.,17.BETA.)-17-HYDROXY-11-[4-(METHYLSULPHONYL)PHENYL]-17-(PENTAFLUOROETHYL)ESTRA-4,9-DIEN-3-ONE
申请人:Bayer Pharma Aktiengesellschaft
公开号:EP3214092A1
公开(公告)日:2017-09-06
This invention concerns Selective Progesterone Receptor Modulators (SPRM) in a prodrug form as well as to their application in therapy. (3α,11β,17β)-11-[4-(methylsulfonyl)phenyl]-17-(pentafluoroethyl)estra-4,9-diene-3,17-diol (Compound 1) is one of the invention prodrugs.
Prodrugs of the selective progesterone receptor modulator (SPRM) (11.beta.,17.beta.)-17-Hydroxy-11-[4-(methylsulphonyl)phenyl] -17-(pentafluoroethyl)estra-4,9-dien-3-one
申请人:BAYER PHARMA AKTIENGESELLSCHAFT
公开号:US10894805B2
公开(公告)日:2021-01-19
This invention concerns Selective Progesterone Receptor Modulators (SPRM) in a prodrug form as well as their application in therapy. (3α, 11β,17β)-1 1-[4-(methylsulfonyl)phenyl]-17-(pentafluoroethyl)estra-4,9-diene-3,17-diol (Compound 1) is one of the invention prodrugs.