申请人:Heading (Nanjing) Pharmtechnologies Co., Ltd.
公开号:US20210198192A1
公开(公告)日:2021-07-01
The present invention discloses a method for preparing florfenicol and its intermediate (V), comprising an addition reaction, a ring closure reaction, a hydrolysis reaction, a ring opening reaction, a reduction reaction, a ring reaction, a fluorination reaction and a ring opening reaction. In the present method for preparing florfenicol, respective reaction steps can be continuously operated, therefore the methods of the present invention features simplified process and shorter synthetic route, and obtained florfenicol has high chiral purity and is of high yield. The method of the present invention for preparing florfenicol (TM) using the intermediate (V) avoids waste water pollution and reduces the cost for treating wastewater and alleviates environmental pollution. At the same time, the methods of the present invention eliminates a chiral resolution procedure, thus increasing the utilization rate of atoms in the reaction. As a result, cost is reduced and process is simplified.
本发明公开了一种制备氟苯菲酚及其中间体(V)的方法,包括加成反应、环闭合反应、水解反应、环开启反应、还原反应、环反应、氟化反应和环开启反应。在本发明制备氟苯菲酚的方法中,各反应步骤可以连续操作,因此本发明的方法具有简化工艺和较短的合成路线,获得的氟苯菲酚具有高手性纯度和高收率。本发明利用中间体(V)制备氟苯菲酚(TM)的方法避免了废水污染,减少了处理废水的成本,缓解了环境污染。同时,本发明的方法消除了手性分辨过程,从而提高了反应中原子的利用率。因此,成本降低,工艺简化。