- Novel synthesis method of chlorobenzotrifluoride
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The invention discloses a novel synthesis method of chlorobenzotrifluoride, wherein o-chlorotoluene is used as a raw material, copper chloride or cuprous chloride is used as a catalyst, and o-chlorobenzotrifluoride is synthesized through two steps of chlorination and fluorination. Compared with the method in the prior art, the method of the invention has the following characteristics that raw materials are subjected to heating dehydration treatment in the dehydration kettle, so that the chlorination side reactions are few, the product purity is high, the graded chlorination device does not need to be additionally arranged, the technological process is simple, and the operation is convenient. According to the chlorination process of the invention, the catalyst is added in batches to increase the efficiency of the catalyst, so that the by-product generated by thechlorination reaction and the emission of waste gas in the production are greatly reduced, and the emission of pollutants in the production process is reduced.
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Paragraph 0015; 0020
(2020/01/14)
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- Substituted Benzotrichloride Synthesis by Phase Transfer-Catalyzed Chlorination
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A new method for converting benzyl and benzal chlorides to benzotrichlorides is reported.In contrast to prior art, the process involves contacting the substrates with strong alkali in a two-phase system containing phase transfer catalyst using organic soluble perchloralkanes acting upon base-generated carbanions.The method is particularly useful for preparing benzotrichlorides substituted by either alkyl or nitro groups.
- Chupp, J. P.,Grabiak, R. C.,Leschinsky, K. L.,Neumann, T. L.
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p. 224 - 226
(2007/10/02)
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- Process for preparing substituted benzotrichloride compounds
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This invention pertains to a process for preparing substituted and unsubstituted benzotrichlorides. The process generally involves reacting the starting compound with a perchloroalkane with presence of base and a phase transfer catalyst.
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