The invention provides 11β-hydroxyandrosta-4-ene-3-one compounds of Formula I, or physiologically acceptable salts or solvates thereof:
wherein R
4
represents a moiety selected from a group consisting of (A), (B) and (C), with a proviso that when R
4
represents moiety (C), Z is S:
PROCESS FOR THE PREPARATION OF 17-DESOXY-CORTICOSTEROIDS
申请人:Taro Pharmaceutical Industries Ltd.
公开号:US20170114088A1
公开(公告)日:2017-04-27
The present invention provides an improved process for the preparation of 17-desoxy corticosteroid derivatives in a single chemical step by reacting the 17-hydroxy starting material with an excess of Trimethylsilyl Iodide. The present invention is specifically advantageous in preparing 17-desoxy corticosteroid derivatives having one or more halogen groups at positions 2, 6, 7 or 9 of the corticosteroid such as Clocortolone of Desoximetasone.