A benzene derivative containing at least two methyl groups and having two methyl groups in o-position is chlorinated so as to exchange five hydrogen atoms of the two o-methyl groups for chlorine, the chlorine is exchanged for fluorine, and the product again chlorinated to give an o-trifluoromethyl-difluorochloromethylbenzene, in which the chlorine may be again replaced by fluorine to give an o-dimethylbenzene hexafluoride. The products are intermediates for dyestuffs, fungicides, and insecticides. In examples: (1) o-xylene or 4-chloro-o-xylene or a dichloro-o-xylene is pentachlorinated, for example, according to the process described in Specification 464,859, the chlorine exchanged for fluorine, and the product again chlorinated to give 1-trifluoromethyl-2-difluorochloromethylbenzene or its 4-chlor or dichlor derivatives, which are then converted to the corresponding hexafluorides; (2) pseudocumene, or a chloro or dichloro derivative, is octachlorinated, the chlorine replaced by fluorine and the product again chlorinated to give a bis-trifluoromethyldifluorochloromethylbenzene, which is then converted to the corresponding nonofluoride; (3) durene is converted by way of its decachloride and decafluoride to a bis-trifluoromethyl-bis-difluorochloromethylbenzene, and thence to durene dodecafluoride. Specification 395,227 also is referred to.
一种苯衍生物,含有至少两个甲基基团,并且在o-位置有两个甲基基团,经氯化后,将这两个o-甲基基团的五个氢原子交换为氯原子,然后再将氯原子交换为氟原子,再次氯化得到一种o-三氟甲基-二氟氯甲基苯,其中氯原子可以再次被氟原子取代,得到一种o-二甲基苯六氟化物。这些产物是染料、杀菌剂和杀虫剂的中间体。在示例中:(1) o-二甲苯或4-氯-o-二甲苯或二氯-o-二甲苯进行五氯化,例如,根据规范464,859中描述的过程,将氯原子交换为氟原子,然后再次氯化得到1-三氟甲基-2-二氟氯甲基苯或其4-氯或二氯衍生物,然后转化为相应的六氟化物;(2) 假山梅烷或氯或二氯衍生物进行八氯化,将氯原子替换为氟原子,然后再次氯化得到双-三氟甲基二氟氯甲基苯,然后转化为相应的九氟化物;(3) 二甲苯通过其十氯化物和十氟化物转化为双-三氟甲基-双-二氟氯甲基苯,然后转化为二甲苯十二氟化物。还参考规范395,227。