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.
这项发明涉及通过选择性烯化11位酮基来制备11-亚甲基类
固醇的方法。所得产品是制备几种药用活性剂的有用中间体,如依诺酮和去甲酮。