4084-38-2Relevant articles and documents
Hecht
, p. 3503 (1968)
Synthetic method of transfluthrin intermediate
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, (2021/08/25)
The invention discloses a synthetic method of a transfluthrin intermediate, and belongs to the technical field of chemical synthesis, the synthetic method is characterized by comprising the following steps: (1) taking 2, 3, 5, 6-tetrafluorobenzene as a raw material, and reacting with carbon tetrachloride to obtain 2, 3, 5, 6-tetrafluorotrichloromethyl benzene; (2) under the action of a composite catalyst, carrying out catalytic hydrolysis on the 2, 3, 5, 6-tetrafluorotrichloromethyl benzene to obtain 2, 3, 5, 6-tetrafluorobenzoyl chloride; (3) under the action of a catalyst, the 2, 3, 5, 6-tetrafluorobenzoyl chloride and hydrogen are subjected to a Rosenmonde reduction reaction, and 2, 3, 5, 6-tetrafluorobenzaldehyde is obtained; (4) carrying out catalytic hydrogenation reaction on the 2, 3, 5, 6-tetrafluorobenzaldehyde and hydrogen to obtain 2, 3, 5, 6-tetrafluorobenzyl alcohol; the method has the advantages of simple steps, high yield of each step and simple reaction; the reaction conditions of each step are mild, and the method has the advantages of low cost, high yield and easily available reaction conditions.
A substituted aromatic alcohols of the economical efficiency of the synthesis process (by machine translation)
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Paragraph 0029; 0033; 0034; 0037; 0038; 0042, (2019/05/15)
The invention discloses a substituted aromatic alcohols of the economical efficiency of the synthesis process, the COOR1 - C6 F4 - COOR1 (R1 Representative C1 - C4 Alkyl) to the organic solvent in the input, in the NaBH4 Under the action of the shall CH reduction reaction2 OH - C6 F4 - CH2 OH (II) and CH2 OH - C6 F4 - COOH (III); the mixture is dissolved in a weak acid buffer solution, after adjusting the pH of the extraction, the aqueous layer containing in II, III contained in the oil reservoir; the oil reservoir into the non-protic solvent removes the carboxyl, shall be CH2 OH - C6 HF4 . The present invention, reduction process residence in the intermediate state, the process on the reduction reducing the requirements of the complete degree, reduce the used as the reducing agent; the mixture with chemical separation, the product is very good use can be obtained. (by machine translation)
Tetrafluorobenzyl alcohol producing mechanical device
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Paragraph 0011; 0012; 0013, (2017/06/23)
The present invention discloses a tetrafluorobenzyl alcohol producing mechanical device and belongs to the machinery field of fine chemical engineering production. The mechanical device comprises: a chemical reacting kettle (1), a decolorizing kettle (2), a distilling kettle (3), and a dryer (4). The mechanical device is characterized in that a 2,3,5,6-tetrafluoro-benzoic acid inlet (5), an ethylene glycol dimethyl ether inlet (6), an ethylene glycol dimethyl ether solution inlet of sodium borohydride (7), and an ethylene glycol dimethyl ether solution inlet of sulfate dimethyl ether (8). A first material pulp pump and a pipeline (9) are arranged between the chemical reacting kettle (1) and the decolorizing kettle (2). An activated carbon inlet (10) is arranged on the decolorizing kettle (2). A second material pulp pump and a pipeline (11) are arranged between the decolorizing kettle (2) and the distilling kettle (3). A steam outlet (12) is arranged on distilling kettle (3). A second conveyor (13) is arranged between the distilling kettle (3) and the dryer (4). A finished product outlet (14) is arranged on the dryer (4).