The present invention relates to a process for preparing 17α-acetoxy-6-methylenepregn-4-ene-3,20-dione (4) as an intermediate, and to processes for preparing medroxyprogesterone acetate (1) (17α-acetoxy-6α-methylpregn-4-ene-3,20-dione) and megestrol acetate (2) (17α-acetoxy-6-methylpregna-4,6-diene-3,20-dione) via this intermediate (4).
本发明涉及一种制备17α-乙酰氧基-6-甲烯基
孕酮-4-烯-3,20-二酮(4)作为中间体的方法,以及通过该中间体(4)制备
醋酸甲地孕酮(1)(17α-乙酰氧基-6α-
甲基孕酮-4-烯-3,20-二酮)和
乙酸甲地孕酮(2)(17α-乙酰氧基-6-甲基孕烯-4,6-二烯-3,20-二酮)的方法。