A process for the production of medrogestone, in which, in an intermediate step, the solvate 3β,5α,6β-trihydroxy-6α,17α-dimethylpregnan-20-one monomethanolate is obtained as a solid, stable compound by displacing the organic solvent from a solution of of 3β,5α,6β-trihydroxy-6α,17α-dimethylpregnan-20-one with a lower alkanol, and a Diels-Alder adduct of 6-methylene-17α-methylpregn-4-ene-3,20-dione with maleic anhydride is used as an intermediate for production of the corresponding dicarboxylic acid salt for removal of 6-methylene-17α-methylpregn-4-ene-3,20-dione contamination of the desired product. Another intermediate, 6β-hydroxy-6α,17α-dimethylpregn-4-ene-3,20-dione, has been found to prevent smooth muscle proliferation and is useful in the treatment of atherosclerosis and restinosis.
一种生产
甲孕酮的工艺,在该工艺的中间步骤中,通过从 3β,5α,6β-三羟基-6α,17α-二甲基孕甾-20-酮的溶液中置换有机溶剂,得到 3β,5α,6β-三羟基-6α,17α-二甲基孕甾-20-酮的单
甲醇溶胶,以及 6-亚甲基-17α-甲基孕甾-20-酮与
马来酸的 Diels-Alder 加合物、将 6-亚甲基-17α-甲基
孕甾-4-烯-3,20-二酮与
马来酸酐的 Diels-Alder 加合物用作生产相应二
羧酸盐的中间体,以去除所需产品中的 6-亚甲基-17α-甲基
孕甾-4-烯-3,20-二酮污染。另一种中间体,6β-羟基-6α,17α-二甲基
孕甾-4-烯-3,20-二酮,已被发现可防止平滑肌增殖,并可用于治疗动脉粥样硬化和再狭窄。