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.
本发明公开了一种新的
氟苄胺合成方法。该方法通过一系列环化、选择性还原、
氟开环、去保护、酰化、羟基
磺酸酯化构型转化反应、
水解反应等组合,合成符合药品管理局要求的
氟苄胺产品。本发明的合成方法利用手性胺闭环环氮
丙烷三元环,采用物理分离方法重复纯化高产量的手性
氨酮,获得单一的R构型,并利用选择性还原将构型转化为
氟苄胺,大大提高了原子经济性,同时避免了现有工艺造成的废
水污染,显著降低了处理废
水成本,减少对环境的污染,从而降低成本并简化了工艺。此外,本发明使用
三乙胺氢
氟化物作为
氟开环试剂,相比气相反应,提高了液相反应的安全性,减少了对设备的腐蚀,有利于工业生产。