Preparation method for 2,3,5,6-tetrafluorohydroquinone
A technology of tetrafluorohydroquinone and aminophenol, which is applied in two fields, can solve the problems of low purity and low yield of target compounds, and achieve the effect of high product purity
Inactive Publication Date: 2011-04-27
SHANGHAI HETENG FINE CHEM +1
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In the above method, it is easy to generate isomers of phenols in different positions in the reaction, and the yield of the target compound is low, and the purity is also low, so it is necessary to find another preparation method
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The invention provides a preparation method for 2,3,5,6-tetrafluorohydroquinone, comprises the reaction step of: hydrolyzing the heavy nitride of 2,3,5,6-tetrafluoro-4-aminophenol to obtain the target compound 2,3,5,6-tetrafluorohydroquinone. In the method, the total yield can reach at least 85 percent, and the product purity is high (higher than 98 percent). The invention is suitable for the industrial requirement. The reaction formula is shown in the specification.
Description
technical field The invention relates to a preparation method of 2,3,5,6-tetrafluorohydroquinone. Background technique 2,3,5,6-Tetrafluorohydroquinone is a chemical intermediate of medicine and pesticide, which is widely used in the fields of medicine and pesticide. Patent Brit887691 uses hexafluorobenzene as raw material to prepare 2,3,5,6-tetrafluorohydroquinone with chemical reaction formula as follows: In the above method, it is easy to generate isomers of phenols in different positions in the reaction, and the yield of the target compound is low, and the purity is also low, so it is necessary to find another preparation method. Contents of the invention The technical problem to be solved in the present invention is to disclose a new preparation method of 2,3,5,6-tetrafluorohydroquinone, so as to overcome the above-mentioned defects in the prior art. The method of the present invention comprises that the diazonium compound of 2,3,5,6-tetrafluoro-4-aminophenol s...
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IPC IPC(8): C07C39/373C07C37/045
CPCY02P20/52
Inventor 施冠成滑国钰孟海成金衍秋
Owner SHANGHAI HETENG FINE CHEM
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