924647-38-1Relevant articles and documents
Synthesis method of 2-(2, 2-difluoroethyoxyl)-6-trifluoromethyl benzenesulfonyl chloride
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, (2021/06/13)
The invention discloses a synthesis method of 2-(2, 2-difluoroethyoxyl)-6-trifluoromethyl benzenesulfonyl chloride. The preparation method comprises the following steps: dissolving 2-trifluoromethyl-4-nitro-bromobenzene in sulfuric acid, adding a halogenating reagent, and reacting at 50-100 DEG C for 1-8 hours; dissolving the obtained 2-bromo-3-trifluoromethyl-5-nitro-benzene halide in a solvent, and performing reduction in a reduction system; carrying out diazotization on the obtained 3-halo-4-bromo-5-trifluoromethyl-aniline, and then carrying out decomposition on the obtained 3-halo-4-bromo-5-trifluoromethyl-aniline; carrying out Grignard reaction on the obtained 2-bromo-3-trifluoromethyl-benzene halide, and then reacting with dialkyl disulfide; carrying out etherification reaction on the obtained 2-alkylthio-3-trifluorotoluene-benzene halide and 2, 2-difluoroethanol in an organic solvent under the action of an alkali; and reacting the obtained 2-(2, 2-difluoroethoxy)-6-trifluoromethyl-phenylalkyl sulfide with chlorine gas at 10-60 DEG C for 1-5 hours. The method is short in route, mild in condition, high in yield and suitable for industrial production.
A 2 - (2, 2 - two fluorine ethoxy groups) -6 - trifluoromethyl phenyl propyl sulfide preparation method (by machine translation)
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Paragraph 0013; 0026; 0028; 0029; 0031, (2019/04/17)
The invention relates to the field of organic synthesis, in particular relates to a 2 - (2, 2 - two fluorine ethoxy groups) - 6 - trifluoromethyl phenyl propyl sulfide preparation method, including difluoro ethanol as the raw material, under the action of
2 - phenoxy four hydrogens fu ([...]) five fluorine sulphur grass amine[...] derivatives and their application in the synthesis of
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Paragraph 0104; 0106, (2017/06/30)
The invention discloses 2-phenoxyl tetrahydrofuran (tetrahydropyrane) derivatives and the application thereof in synthesis of penoxsulam, and belongs to the field of pesticide synthesis. A new intermediate of a penoxsulam pesticide is synthesized by the derivatives of the design of the invention. A high-toxicity raw material is not required to be used in the preparation of the intermediate; a product is convenient to purify and high in yield; a synthesizing process is environment-friendly; the synthesis cost is low. The penoxsulam pesticide can be prepared conveniently by utilizing the intermediate; the intermediate has a good application prospect. The series of derivatives are easy and convenient to synthesize; compared with the reported penoxsulam intermediate, a low-boiling-point raw material with high toxicity, namely, chloromethyl methyl ether, is not required to be used in the synthesizing process; the safety of the synthesizing process is improved; the derivatives are favorable to industrialized production and application.