用途:用作医药中间体
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
Α,Α,Α',Α'-四氯邻二甲苯 | α,α,α',α'-tetrachloro-o-xylene | 25641-99-0 | C8H6Cl4 | 243.948 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
1-(三氯甲基)-2-(三氟甲基)苯 | trichloromethyl-trifluoromethyl-benzene | 651-36-5 | C8H4Cl3F3 | 263.474 |
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.