The present invention is directed to 2.beta.,19-(methyleneamino)androst-4-ene-3,17-dione which has the formula ##STR1## and the corresponding 17.beta.-ol which are useful as aromatase inhibitors. The compounds are prepared by the cyclization of an appropriate 19-[N-protected-[(2-methoxyethoxy)methylamino] steroid using titanium tetrachloride followed by, if desired, selective reduction of the 17-ketone.
本发明涉及具有以下式子的2.beta.,19-(亚甲基
氨基)
雄甾-4-烯-3,17-二酮及其对应的17.beta.-醇,其可用作芳香化酶
抑制剂。该化合物通过使用
四氯化钛催化适当的19-[N-保护-[(2-甲氧基乙氧基)甲基]
氨基]类
固醇环化制备,然后,如果需要,选择性还原17-酮基。