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    • 86. 发明申请
    • PROCESS FOR THE PREPARATION OF 3-OXIMINO STEROIDS
    • 制备3-OXIMINO STEROIDS的方法
    • WO2006020885A1
    • 2006-02-23
    • PCT/US2005/028769
    • 2005-08-12
    • SICOR, INC.VILLA, MarcoFRETTA, RobertaDIULGHEROFF, Nicola
    • VILLA, MarcoFRETTA, RobertaDIULGHEROFF, Nicola
    • C07J41/00
    • C07J41/00C07J41/0016
    • The present invention provides a method of preparing norelgestromin or norgestimate by reacting the corresponding 3-oxosteroid precursor with hydroxylamine HCl and a base to obtain a reaction mixture forming norelgestromin or norgestimate; monitoring the anti/syn ratio of the norelgestromin or norgestimate produced in the reaction mixture; adding a base to the reaction mixture to neutralize acidity in the reaction mixture when a desired anti/syn ratio is detected; and isolating the norelgestromin or norgestimate. The present invention also provides a process allowing a control of the formation of the anti isomer and syn isomer of norelgestromin or norgestimate by reacting the corresponding 3-oxosteroid precursor with hydroxylamine HCl and a base to obtain a reaction mixture forming norelgestromin or norgestimate; regulating the acidity of the reaction mixture to adjust the anti/syn ratio of the norelgestromin or norgestimate produced in the reaction mixture; adding a base to the reaction mixture to neutralize acidity in the reaction mixture when a desired anti/syn ratio is detected; and isolating the norelgestromin or norgestimate.
    • 本发明提供了通过使相应的3-氧代甾体前体与羟胺HCl和碱反应来制备诺美孕酮或诺孕酯的方法,以获得形成诺美孕酮或诺孕酯的反应混合物; 监测反应混合物中产生的去甲孕酮或诺孕酯的抗/顺反比; 当检测到所需的抗/顺式比时,向反应混合物中加入碱以中和反应混合物中的酸度; 并分离去甲孕酮或诺孕酯。 本发明还提供一种方法,其通过使相应的3-氧代甾体前体与羟胺HCl和碱反应以获得形成去甲孕激素或诺孕酯的反应混合物,从而控制去甲孕酮或诺孕酯的抗异构体和顺式异构体的形成; 调节反应混合物的酸度以调节反应混合物中产生的诺美辛溴或诺孕酯的抗/顺比; 当检测到所需的抗/顺式比时,向反应混合物中加入碱以中和反应混合物中的酸度; 并分离去甲孕酮或诺孕酯。