会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 6. 发明授权
    • Preparation of trifluoromethylanilines
    • 三氟甲基苯胺的制备
    • US06333434B1
    • 2001-12-25
    • US09707180
    • 2000-11-06
    • Albrecht MarholdKäthe Baumann
    • Albrecht MarholdKäthe Baumann
    • C07C20900
    • C07C209/365C07C211/52
    • The invention relates to a process for the preparation of trifluoromethylanilines of formula (I) wherein R1 is hydrogen, fluorine, chlorine, bromine, methyl, monochloromethyl, dichloromethyl, or formyl, and R2 is hydrogen, fluorine or chlorine, with the proviso that when R1 and R2 are both hydrogen, the amino group is para to the trifluoromethyl group, comprising (a) nitrating a benzotrichloride of formula (II)  wherein R1 and R2 are each as defined for formula (I), thereby forming a nitrobenzotrichloride, (b) converting the trichloromethyl group of the nitrobenzotrichloride into a trifluoromethyl group by reaction with anhydrous hydrofluoric acid, thereby forming a nitrobenzotrifluoride, and (c) reducing the nitro groups of the nitrobenzotrifluoride to form a trifluoromethylaniline of formula (I).
    • 本发明涉及一种制备式(I)的三氟甲基苯胺的方法,其中R 1是氢,氟,氯,溴,甲基,一氯甲基,二氯甲基或甲酰基,R 2是氢,氟或氯,条件是当R1和 R 2均为氢,氨基为三氟甲基的对位,包括(a)硝化式(II)的苯并三氯化物,其中R 1和R 2各自如式(I)所定义,从而形成硝基三氯甲烷,(b)转化 通过与无水氢氟酸反应将硝基三氯甲苯的三氯甲基转化为三氟甲基,从而形成硝基三氟甲苯,(c)还原硝基三氟甲苯的硝基以形成式(I)的三氟甲基苯胺。