Azasteroids as inhibitors of rat prostatic 5.alpha.-reductase
作者:Gary H. Rasmusson、Glenn F. Reynolds、Torleif Utne、Ronald B. Jobson、Raymond L. Primka、Charles Berman、Jerry R. Brooks
DOI:10.1021/jm00378a028
日期:1984.12
were prepared from 3-keto-delta 4-precursors by oxidative (O3 or NaIO4-KMnO4) A-ring cleavage followed, in turn, by ring closure with an amine and hydrogenation over platinum catalyst. Other A-ring azasteroids were made by Beckmann rearrangement of oximes of 2-oxo-A-nor, 3-oxo- and 4-oxo-5 alpha-androstanes. An A-nor-2-oxo-3-azasteroid was prepared by oxidative decarbonylation of a precursor 2,3-dioxo-4-azasteroid
Azasteroids: structure-activity relationships for inhibition of 5.alpha.-reductase and of androgen receptor binding
作者:Gary H. Rasmusson、Glenn F. Reynolds、Nathan G. Steinberg、Edward Walton、Gool F. Patel、Tehming Liang、Margaret A. Cascieri、Anne H. Cheung、Jerry R. Brooks、Charles Berman
DOI:10.1021/jm00161a028
日期:1986.11
In addition, 4-azasteroids with a D-homo ring or methyl substitution at C-7 (alpha and beta) or C-16 (alpha and beta) were prepared. The majority of the C-17 substituents were prepared from reactive intermediates derived from the 17 beta-COOH. Enhanced 5 alpha-reductase inhibition in both the human and rat enzyme assays is seen with 4-CN substitution on 3-oxo-delta 4 steroids and with a C-17 side