![一种依达拉奉的制备方法](/CN/2011/1/14/images/201110072032.jpg)
基本信息:
- 专利标题: 一种依达拉奉的制备方法
- 专利标题(英):Preparation method for edaravone
- 申请号:CN201110072032.9 申请日:2011-03-24
- 公开(公告)号:CN102180834A 公开(公告)日:2011-09-14
- 发明人: 朱永强 , 王凌燕 , 杨杨 , 黄跃 , 朱勇
- 申请人: 江苏正大丰海制药有限公司
- 申请人地址: 江苏省盐城市大丰市健康东路103号
- 专利权人: 江苏正大丰海制药有限公司
- 当前专利权人: 江苏正大丰海制药有限公司
- 当前专利权人地址: 江苏省盐城市大丰市健康东路103号
- 代理机构: 南京天华专利代理有限责任公司
- 代理人: 徐冬涛
- 主分类号: C07D231/26
- IPC分类号: C07D231/26
The invention discloses a preparation method for edaravone. The preparation method comprises the following steps of: reacting phenylhydrazine with ethyl acetoacetate in an alcohol solvent under the action of a catalyst to prepare the edaravone; and after the reaction, adding a non-alcohol solvent to cool and crystallize to obtain the edaravone crude product. The high-yield and high-purity edaravone is prepared from the phenylhydrazine and the ethyl acetoacetate which serve as the raw materials in the presence of acid serving as the catalyst. The quality of the edaravone product is high; the process is simple; the reaction condition is mild and easy to control; the aftertreatment is simple; the problem of three wastes is avoided; cost is low; and the preparation method is suitable for industrialized production.
公开/授权文献:
- CN102180834B 一种依达拉奉的制备方法 公开/授权日:2012-09-26
IPC结构图谱:
C | 化学;冶金 |
--C07 | 有机化学 |
----C07D | 杂环化合物 |
------C07D231/00 | 杂环化合物,含1,2-二唑或氢化1,2-二唑环 |
--------C07D231/02 | .不与其他环稠合 |
----------C07D231/06 | ..环原子间或环原子与非环原子间有1个双键 |
------------C07D231/14 | ...有杂原子或有以3个键连杂原子、其中最多以1个键连卤素的碳原子,例如,酯基或腈基,直接与环碳原子相连 |
--------------C07D231/18 | ....1个氧或硫原子 |
----------------C07D231/20 | .....1个氧原子连在位置3或5 |
------------------C07D231/22 | ......有芳基连在环氮原子上 |
--------------------C07D231/26 | .......苯环上未被取代的或被取代的1-苯基-3-甲基-5-吡唑啉酮 |