The present invention relates to a process for the synthesis of the known 17-acetoxy-11-β-[4-(dimethyl amino)-phenyl]-21-methoxy-19-norpregna-4,9-dien-3,20-dione (further on CDB-4124) of formula (I) from 3,3-[1,2-ethandiyl-bis(oxy)]-oestr-5(10),9(11)-dien-17-one of formula (II). Compound CDB-4124 belongs to the group of anti-hormones. The process has the following steps: i) formation of an epoxide; ii) addition of hydrogen cyanide; iii) silylation of a hydroxyl group; iv) reaction with 4-(dimethylamino)-phenyl magnesium bromide Grignard reagent in the presence of CuCl (Teutsch reaction); v) silylation of a hydroxyl group with trimethyl chlorosilane; vi) reaction with diisobutyl aluminum hydride and after addition of acid to the reaction mixture; vii) methoxy-methylation with methoxy-methyl Grignard reagent formed in situ, while hydrolyzing the trimethylsilyl protective groups; viii) oxidation of a hydroxyl group with dicyclohexyl carbodiimide in the presence of dimethyl sulfoxide and a strong organic acid (Swern oxidation), and in given case after purification by chromatography; ix) acetylation of a hydroxyl group with acetic anhydride in the presence of perchloric acid, and in given case, purification by chromatography. The invention also relates to new intermediates of the process.
本发明涉及一种从式(II)的3,3-[1,2-乙二基基(氧)]-雌-5(10),9(11)-二烯-17-酮合成已知的式(I)的17-乙酰氧基-11-β-[4-(二甲基
氨基)-苯基]-21-甲氧基-19-去孕烷-4,9-二烯-3,20-二酮(以下称为CDB-4124)的过程。化合物CDB-4124属于抗激素类。该过程包括以下步骤:i)环氧化反应;ii)
氢氰酸加成反应;iii)羟基
硅基化反应;iv)在CuCl存在下,与4-(二甲基
氨基)-苯基
镁溴格氏试剂反应(Teutsch反应);v)羟基
硅基化反应,使用三
甲基氯硅烷;vi)与
二异丁基铝
氢化物反应,加入酸后反应混合物;vii)使用在位形成的甲氧甲基
格氏试剂进行甲氧基甲基化反应,同时
水解三甲基
硅保护基;viii)在
二甲基亚砜和强有机酸(Swern氧化)存在下,使用二环己基碳二
亚胺氧化羟基,必要时通过色谱纯化;ix)在
高氯酸存在下,使用
乙酸酐乙酰化羟基,必要时通过色谱纯化。本发明还涉及该过程的新中间体。