The invention relates to a process for the preparation of 11-methylene steroids through selective olefination of the ketone at position 11. The resulting products are useful intermediates in the preparation of several pharmaceutically active agents, such as Etonogestrel and Desogestrel.
本发明涉及一种通过第 11 位酮的选择性烯化来制备 11-亚甲基类
固醇的工艺。所得产物是制备多种药物活性剂(如
依托孕烯和
去氧孕烯)的有用中间体。