Microbiological hydroxylation of steroids. Part IV. The pattern of dihydroxylation of mono-oxygenated 5α-androstanes with cultures of the fungus Calonectria decora
作者:A. M. Bell、P. C. Cherry、I. M. Clark、W. A. Denny、Ewart R. H. Jones、G. D. Meakins、P. D. Woodgate
DOI:10.1039/p19720002081
日期:——
concerned with the relation between the pattern of the dihydroxylation by Calonectriadecora of mono-oxygenated 5α-androstane derivatives (mainly ketones), and the position of the oxygen function in the substrate. Terminal ring ketones (3, 4, 16, and 17) are converted, in useful yields, into one or two dihydroxy-ketones. (Ring B and C ketones are much less satisfactory as substrates.) The structures of most
Use of 17B-acyl-4-aza-5alpha-androst-1-en-3-ones for the preparation of a medicament for the prevention of prostatic carcinoma
申请人:MERCK & CO. INC.
公开号:EP0547690A1
公开(公告)日:1993-06-23
17β-Acyl-4-aza-5α-androst-1-ene-3-ones of the formula:
wherein
R isselected from hydrogen, methyl and ethyl and
R² ismonocyclic aryl optionally containing 1 or more lower alkyl substituents of from 1-2 carbon atoms and/or 1 or more halo (Cl or Br) substituents; and
R', R'' and R'''are each selected from hydrogen and methyl and pharmaceutical formulation of the above compounds are active as testosterone 5α-reductase inhibitors and thus are useful for the prevention of prostatic carcinoma.
Das steroidale 2,4-Cyclohexadienon 3 geht photochemisch in das Diastereomere 4 über. Beide Konfigurationsisomere unterscheiden sich deutlich in ihren chiroptischen Eigenschaften. Ihr jeweiliger Anteil im photostationären Zustand hängt von der Wellenlänge des Lichts und dem Lösungsmittel ab. DasDienylketen 5 läßt sich als Transient spektroskopisch nachweisen. Es wird von 2,2,2-Trifluorethanol nicht