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Pyriproxyfen synthesis method

A synthesis method and a technology for disopyramide, which are applied in the field of synthesis of disopyr ether, can solve the problems of difficult industrialized production, cumbersome methods and the like, and achieve the effects of easy industrialized production and simple process method.

Inactive Publication Date: 2017-11-03
NANTONG PAISIDI PESTICIDE CHEM
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Problems solved by technology

And the synthetic method of existing disopyroxy ether, method is all more loaded down with trivial details, is not easy to suitability for suitability for industrialized production

Method used

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Embodiment Construction

[0024] Such as figure 1 and figure 2 As shown, the specific production process steps are as follows:

[0025] 1. Synthesis of POP

[0026] Put 1600Kg of toluene, 440Kg of phenol, and 275KG of potassium hydroxide into the reaction kettle in turn, raise the temperature, and bring water under reflux until the temperature of the kettle reaches 110°C and bring it to anhydrous; evaporate the toluene, and add 10Kg of catalyst copper powder into the reaction kettle at one time During heating, at 140°C, 600Kg of p-chlorophenol was added dropwise, the dropping temperature was controlled at 140-150°C, and the dropping time was about 4 hours. Phenol < 1%, the reaction is over; use vacuum distillation to distill out POP: 782Kg (content 98%, yield: 90%, based on p-chlorophenol);

[0027] 2. Synthesis of PPP

[0028] Put 2000Kg of water, 247Kg of potassium hydroxide, and 782Kg of POP into the reaction kettle, start stirring, and drop 240Kg of propylene oxide at 10-20°C for about 3 hours...

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Abstract

The invention relates to a pyriproxyfen synthesis method. A synthesis route is formed by three-step reaction including that (1) reaction between phenol and parachlorophenol is performed under the action of potassium hydroxide and methyl benzene to obtain p-phenoxyphenol; (2) reaction between p-phenoxyphenol and epoxypropane is performed under the action of potassium hydroxide to obtain 1-(4-phenoxyphenoxy)2-propanol; (3) reaction between 1-(4-phenoxyphenoxy)2-propanol and 2-chloropyridine is performed under the action of potassium hydroxide and methyl benzene to obtain pyriproxyfen. The pyriproxyfen which belongs to novel juvenoid insecticides is a phenyl ether type insect growth disturbance insect growth regulator and has advantages of systemic transfer activity, low toxicity, long acting duration, safety to crops, low toxicity to fishes, low influences on ecological environment. The pyriproxyfen synthesis method is simple and convenient and easy for industrial production.

Description

technical field [0001] The invention relates to the field of organic chemistry, in particular to a synthesis method of disopyroxyle. Background technique [0002] Disopyroxyfen is an insect growth regulator that disrupts the growth of insects with phenyl ethers. It is a new type of insecticide that is similar to juvenile hormones. It has systemic transfer activity, low toxicity, and long-lasting effect. It is safe for crops and low for fish. It is poisonous and has little impact on the ecological environment; it has good control effect on whitefly, scale insect, diamondback moth, beet armyworm, litura litura, pear yellow psyllid, thrips, etc., and this product is hygienic to flies, mosquitoes, etc. Pests have a good control effect, and can inhibit the pupation and eclosion of mosquito and fly larvae; the mosquito and fly larvae will basically die in the pupal stage and cannot emerge after being exposed to the agent; the effective period of the agent is as long as about 1 mon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D213/64
CPCC07D213/64
Inventor 唐志军
Owner NANTONG PAISIDI PESTICIDE CHEM
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