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    • 9. 发明公开
    • Process for producing 3,5-difluoroaniline
    • Verfahren zur Herstellung von 3,5-difluoro Anilin。
    • EP0497213A2
    • 1992-08-05
    • EP92101099.7
    • 1992-01-23
    • ISHIHARA SANGYO KAISHA, LTD.
    • Nasu, RikuoHamaguchi, Motohiko
    • C07C209/68C07C209/74C07C211/52
    • C07C209/74C07C209/68
    • A process for producing 3,5-difluoroaniline, which comprises reacting a benzonitrile compound of the formula (I):

      wherein each of Xi, X 2 and X 3 is hydrogen, chlorine, bromine or a cyano group, provided that at least one of X 1 to X 3 is a cyano group, with a mineral acid for hydrolysis and decarboxylation to obtain an aniline compound of the formula (II):

      wherein each of X 4 , X 5 and X 6 is hydrogen, chlorine or bromine, provided that at least one of X 4 to X 6 is hydrogen, and in the case of a compound of the formula (II) wherein X 4 , X 5 and X 6 are not simultaneously hydrogen, reacting such a compound with hydrogen in a presence of a catalyst for reduction to obtain 3,5-difluoroaniline.
    • 一种制备3,5-二氟苯胺的方法,其包括使式(I)的苄腈化合物:其中X1,X2和X3各自为氢,氯,溴或氰基,其中至少一个 X 1〜X 3为氰基,与无机酸进行水解和脱羧反应,得到式(II)的苯胺化合物:其中X 4,X 5和X 6各自为氢,氯或溴,条件是在 X 4〜X 6中的至少一个为氢,在X 4,X 5,X 6不同时为氢的式(II)化合物的情况下,在还原用催化剂的存在下使该化合物与氢反应,得到3 ,5-二氟苯胺。