Cloquintocet-mexyl synthesizing method

A synthetic method and technology of cloclofenac-ethyl, applied in botany equipment and methods, animal repellents, biocides, etc., can solve unseen problems

Inactive Publication Date: 2008-10-29
SUZHOU CHIEN SHIUNG INST OF TECH
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Problems solved by technology

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Embodiment Construction

[0017] According to the synthetic method of the cloclofenacyl of the present embodiment specifically comprises the following steps:

[0018] (1), monochloroacetic acid and 2-heptanol generate chloroacetic acid-2-heptyl ester under catalyst action esterification reaction;

[0019] Add 47.3g (0.5mol) of chloroacetic acid, 63.8g (0.55mol) of 2-heptanol and 25mL of ring Hexane, heating, when chloroacetic acid is completely dispersed, add 1.5g copper methanesulfonate (catalyst), reflux reaction under stirring and divide water in time, when the water output no longer increases, end the reaction, cool, filter out methyl Copper sulfonate, add saturated Na to the filtrate 2 CO 3 The solution was washed to weak alkalinity, the organic layer was separated, the aqueous layer was extracted with ether, the ether layer and the organic layer were combined, washed with saturated brine, anhydrous Na 2 SO 4 After drying overnight and removing the former fraction under reduced pressure, 86.2 ...

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Abstract

The invention relates to a method for synthesizing mefenpyr-diethyl, sequentially comprising the following steps of: allowing esterification reaction of haloacetic acid and 2-heptanol in the presence of catalyst to obtain haloacetic acid-2-heptanol, and allowing condensation reaction of the haloacetic acid-2-heptanol, 5-chloro-8-hydroxyquinoline and potassium carbonate at a molar ratio of 1:(1-1.2):(1-4) in a solvent by heating, stirring and refluxing for 2.5-8 hours to obtain mefenpyr-diethyl. The solvent is toluene or a mixture of toluene and dimethyl formamide. The synthetic method has the advantages of short synthetic route, high yield, and low cost.

Description

technical field [0001] The invention relates to a method for synthesizing a herbicide safener, in particular to a method for synthesizing clofenacyl. Background technique [0002] Herbicide Safener is a compound that selectively protects crops from herbicide damage without affecting the activity of herbicides on target weeds, also known as herbicide antidote (Antidode), crop Crop safener for herbs and Protectant. There are two main uses of herbicide safeners: by increasing the tolerance of sensitive plants, reducing or eliminating the damage of high-efficiency but poorly selective herbicides to crops; toxicity. The use of safeners enhances the tolerance of crops to herbicides, which is of great significance to the development of new herbicides, the expansion of the application range of old products, and the enhancement of the competitiveness of old products. Moreover, the target of safeners can be used to study herbicides mechanism of action of the agent. Therefore, rese...

Claims

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Application Information

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IPC IPC(8): C07D215/28A01N25/32
Inventor 杜晓晗顾准黄松鹤陈雪峰
Owner SUZHOU CHIEN SHIUNG INST OF TECH
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