87757-18-4Relevant articles and documents
Herbicide isoxapyrifop technical and preparation method thereof
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Paragraph 0040; 0045; 0046, (2018/09/12)
The invention discloses herbicide isoxapyrifop technical and a preparation method thereof and belongs to the technical field of agricultural chemical raw materials. The preparation process of the herbicide isoxapyrifop technical comprises steps as follows
A wicked grass ether and intermediate 2, 3, 5 - trichloro-pyridine synthesis method (by machine translation)
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Paragraph 0032; 0035; 0043; 0044, (2017/07/19)
The invention discloses a wicked grass ether and intermediate 2, 3, 5 - trichloro-pyridine synthesis method, in particular comprising the following steps: 1st step, pyridine (I) with chlorine in the chlorination reaction under the presence of a base catalyst, through a chlorination reaction, synthesis of chloro-pyridine (II); 2nd step, multi-chloro-pyridine (II) is mixed with hydrogen, by dechlorination reaction catalyst to catalyze the hydrogenation, by hydrogenation dechlorination reaction, by 2, 3, 5 - trichloropyridine (III), the hydrogenation dechlorination reaction catalyst is platinum, palladium, a ruthenium carbon; 3rd step, 2, 3, 5 - trichloropyridine (III) with the N - [( ±) - 2 - (4 - hydroxy benzene ammonia oxygen) propionyl] Isoxazolidine (IV), acid, organic solvent are mixed to obtain a wicked grass ether (V). The advantage of this invention is characterized in that: the main raw material sources are extensive, the product quality is high, high yield, waste water is less, large-scale production of 2, 3, 5 - dichloro pyridine, 2, 3 - chlorinate and downstream various pesticide production and model chloro pyridine pesticide development provides a convenient method of cleaning low energy consumption. (by machine translation)
2-(Substituted phenoxy)propionic acid derivatives and their uses for herbicidal purposes
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, (2008/06/13)
New 2-(substituted-phenoxy)propionic acid derivatives are provided, which have the structure of the general formula: STR1 and R2 is a hydrogen atom or a lower alkyl group. They have a high herbicidal activity to weeds, particularly graminaceous