FLORFENICOL SYNTHESIZING METHOD
    4.
    发明公开
    FLORFENICOL SYNTHESIZING METHOD 审中-公开
    SYNTHESEVERFAHRENFÜRFLORFENICOL

    公开(公告)号:EP3133061A4

    公开(公告)日:2017-08-30

    申请号:EP14889255

    申请日:2014-04-16

    CPC classification number: C07C315/04 C07D263/10 C07D263/20 C07C317/32

    Abstract: The present invention discloses a new florfenicol synthesizing method. The method synthesizes florfenicol products meeting requirements of the Drug Administration by a series of combinations of cyclization, selective reduction, fluorinated open ring, deprotection and acylation, hydroxyl sulfoacid esterified configuration converting reaction, hydrolysis reaction and the like. The synthesizing method of the present invention utilizing chiral amine closed-ring aziridine three-membered ring uses a physical separation method to repeatedly purify chiral aminoketone of high yield obtaining single R configuration, and uses selective reduction and converts the configuration to obtain florfenicol, greatly improving atom economy, while avoiding waste water pollution caused by the existing process, and greatly reducing costs for treating waste water and reducing pollution to the environment, thus lowering costs and simplifying the process. In addition, the present invention uses triethylamine hydrofluoride as a fluorinated open-ring reagent, to improve safety of a liquid reaction compared to a gas reaction and reduce corrosion of equipment, facilitating industrial production.

    Abstract translation: 本发明公开了一种新的氟苯尼考合成方法。 该方法通过环化,选择性还原,氟化开环,脱保护和酰化,羟基磺酸酯化构型转化反应,水解反应等一系列组合合成满足药物管理局要求的氟苯尼考产品。 本发明利用手性胺闭环氮丙啶三元环的合成方法采用物理分离的方法反复纯化高收率的手性氨基酮,得到单一R构型,并采用选择性还原将其转化为氟苯尼考,大大提高 同时避免了现有工艺造成的废水污染,大大降低了废水处理成本,减少了对环境的污染,从而降低了成本,简化了工艺流程。 此外,本发明使用三乙胺氢氟酸作为氟化开环试剂,与气体反应相比提高液体反应的安全性并减少设备的腐蚀,促进工业生产。

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