15952-70-2Relevant articles and documents
Preparation method of 2,4-difluoro-3,5-dichloronitrobenzene
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Paragraph 0024; 0035-0038, (2020/01/12)
The invention provides a preparation method of 2,4-difluoro-3,5-dichloronitrobenzene, which belongs to the field of pesticide intermediate preparation and solves the problem of existing synthesis of 2,4-difluoro-3,5-dichloronitrobenzene such as poor selec
Preparation method for 3,5,-dichloro-2,4,-difluoroaniline
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Paragraph 0113-0115, (2017/03/08)
The invention relates to the field of organic synthesis, specifically to a preparation method for 3,5,-dichloro-2,4,-difluoroaniline and application thereof. The preparation method for 3,5,-dichloro-2,4,-difluoroaniline provided by the invention comprises the following steps: 1) nitration reaction; 2) reduction reaction; 3) diazotization reaction; 4) nitration reaction; 5) fluorination reaction; and 6) reduction reaction. The preparation method for 3,5,-dichloro-2,4,-difluoroaniline provided by the invention has the following beneficial effects: 1) the method has mild reaction conditions, is stable and controllable, has less active sites, is insusceptible to side reaction, and has good yield and quality in the whole line; and 2) raw materials are cheap and easily available, so cost can be effectively reduced, and energy is saved; meanwhile, the use of chlorine gas is avoided, so the method is environment-friendly.
Urea derivatives and pesticidal compositions containing same
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, (2008/06/13)
This invention relates to compounds of the formula STR1 Z' is chlorine or fluorine, with the proviso that Z' is chlorine when Q is the moiety of Formula III. The invention also relates to the preparation of the compounds, their use in controlling animal pests in plant protection, and pesticidal agents comprising the compounds as active ingredients.