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.
本发明提供了一种改进的方法,通过将17-羟基起始物质与过量的
碘化三甲基
硅反应,在单一
化学步骤中制备17-去氧皮质类
固醇衍
生物。本发明特别有利于制备具有在皮质类
固醇的2、6、7或9位上有一个或多个卤素基团的17-去氧皮质类
固醇衍
生物,例如Clocortolone或Desoximetasone。