The present invention relates to a process for the preparation of compounds of the general formula I ##STR1## in which X and Y, independently of each other, represent hydrogen, fluorine, chlorine or bromine, but cannot simultaneously represent hydrogen, characterised in that compounds of the general formula II ##STR2## in which X and Y are defined as above, are reacted with aqueous ammonia under copper catalysis, and to intermediates for the preparation of compounds of the general formula I.
本发明涉及一种用于制备一般式I的化合物的方法,其中X和Y分别表示氢、
氟、
氯或
溴,但不能同时表示氢,其特征在于将一般式II的化合物在
铜催化下与
水合
氨反应,其中X和Y如上所定义,并且涉及制备一般式I的中间体。