16063-70-0Relevant articles and documents
Eine neue, einfache Synthese von 2,3,5-Trichlorpyridin
Steiner, Eginhard,Martin, Pierre,Bellus, Daniel
, p. 983 - 985 (1982)
A simple synthesis of 2,3,5-trichloropyridine by the copper-catalyzed free radical addition of chloral to acrylonitrile with or without isolation of the primary 1:1 adduct, 4-formyl-2,4,4-trichlorobutyronitrile (1), is described.
Halopyridines. I. Synthesis of 3,5-Dichloro-2-pyridone and 2,3,5-Trichloropyridine
Shvekhgeimer, M.-G. A.,Kobrakov, K. I.,Sychev, S. S.,Promonenkov, V. K.
, p. 865 - 867 (1987)
Trichloroacetonitrile reacts with acrolein to give 2,2,4-trichloro-5-oxopentanonitrile, the cyclization of which to chloropyridines has been examined.
Synthesis method of 2, 3, 5-trichloropyridine
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Paragraph 0011; 0032-0047, (2021/01/25)
The invention relates to a synthesis method of 2, 3, 5-trichloropyridine. The method comprises the following steps: (1) in the presence of a phase transfer catalyst and a polymerization inhibitor, carrying out chemical reaction on trichloroacetaldehyde, acrylonitrile and the catalyst at 60-90 DEG C to prepare an intermediate product 2, 4, 4-trichloro-4-formyl butyronitrile; and (2) heating a reaction solution obtained in the step (1) to 60-100 DEG C, and slowly introducing hydrogen chloride gas into the reaction solution to carry out cyclization reaction, thereby preparing the target compound2, 3, 5-trichloropyridine. The synthesis method has the advantages of mild reaction conditions, no need of harsh reaction conditions, such as high temperature, high pressure and reaction solvent, recyclable catalyst, less heavy metal pollution, high target product yield (up to 80%), high purity (up to 99%), simple post-treatment of the product, and reduced cost, and is suitable for industrial production.
Resourceful treatment method of picloram solid residues
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Paragraph 0065-0068; 0073-0096, (2020/11/23)
The invention relates to a picloram solid residue resourceful treatment method which comprises the following steps: a) carrying out decarboxylation reaction on picloram solid residues, performing filtering, taking filtrate, and separating out solid; b) sequentially carrying out diazotization and chlorination reaction on the solid obtained in the step a), separating out the solid, performing filtering, taking a filter cake, and performing separating to obtain 2, 3, 4, 5-tetrachloropyridine; c) subjecting the 2, 3, 4, 5-tetrachloropyridine obtained in the step b) to a dechlorination reaction soas to obtain 2, 3, 5-trichloropyridine and/or 2, 5-dichloropyridine. According to the resourceful treatment method provided by the invention, the picloram solid residues can be converted into 2, 3, 5-trichloropyridine products with good market demand prospects and relatively high economic values, and further efficient utilization of the picloram solid residues is realized.