The invention relates to a process for the preparation of 17α-cyanomethyl-17β hydroxy steroids comprising the reaction of 17-keto steroids with cyanomethyl cerium derivatives. The process is advantageous for the industrial production, since it avoids the use of cyanides and allows to obtain higher yields compared to the use of lithium acetonitrile.
本发明涉及一种制备 17α-
氰甲基-17β羟基类
固醇的工艺,包括 17-
酮类固醇与
氰甲基
铈衍
生物的反应。与使用
乙腈锂相比,该工艺避免了
氰化物的使用,并能获得更高的产率,因此有利于工业化生产。