利索-全球专利检索

  1. 登录
  2. 注册
发明公开
CN101287695A 制备5－卤代－2,4,6－三氟间苯二甲酸的方法 无效 - 撤回

制备5－卤代－2,4,6－三氟间苯二甲酸的方法
摘要：
本发明涉及一种制备式(I)的5－卤代－2，4，6－三氟间苯二甲酸的方法，其中X代表F、Cl、Br或I，所述方法通过水解式(II)的5－卤代－2，4，6－三氟间苯二甲腈来进行。所述发明的特征在于：在第一步中，在室温下使间苯二甲腈(II)或包含间苯二甲腈(II)的溶液与浓硫酸反应并随后对其加热，以形成通式(III)的5－卤代－2，4，6－三氟间苯二甲酰胺；在第二步中，进一步加热并且添加水之后，制得间苯二甲酸(I)。
摘要（英）：

The invention relates to a method for producing 5-halo-2,4,6-trifluoroisophthalic acid of formula (I), wherein X represents F, Cl, Br, or I, by hydrolysis of 5-halo-2,4,6-trifluoroisophthalodinitrile of formula (II). Said invention is characterised in that in a first step, isophthalodinitrile (II) or a solution containing isophthalodinitrile (II) is reacted with a concentrated sulphuric acid at room temperature in order to form a 5-haIo-2,4,6-trifluoroisophthalodiamide of general formula (III), and is, subsequently, heated and in a second step, isophthalic acid (I) is produced after additional heating and addition of water.

0/0