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Study on the Synhesis of the Intermediates (E)-N-Aminochloro-(1-Hydroxyvinyl)-N-Isopropylformamidine of Triazophos

Author: WuDeQiang
Tutor: DingChengRong
School: Zhejiang University of Technology
Course: Applied Chemistry
Keywords: Chlorine Triazophos Intermediates Isoxazolepropionic alcohol Isopropyl hydrazine Chlorocarbonyl isocyanide dichloro Synthesis
CLC: TQ453.2
Type: Master's thesis
Year: 2006
Downloads: 21
Quote: 0
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Abstract


Chlorine Triazophos the late twentieth century, the development of an organic phosphorus insecticide , nematicide , it has the characteristics of high efficiency , low toxicity , broad-spectrum . This paper focuses on the synthetic chlorine Triazophos intermediates isoxazolepropionic alcohol . The three intermediate isopropyl hydrazine chlorocarbonyl isocyanide dichloride and isoxazolepropionic alcohol , and their structures were characterized . Three synthetic route for chlorine Triazophos through access to a large number of documents , in-depth study . And its intermediates isopropyl hydrazine , chlorocarbonyl isocyanide dichloride and isoxazole alcohol synthetic route Experiment. Hydrazine hydrate as a starting material , respectively, through the synthesis of isopropyl bromide and catalytic hydrogenation isopropyl hydrazine ; synthesized chlorocarbonyl isocyanide dichloro methylamino carbonyl chloride as a starting material . Isopropyl hydrazine and chlorocarbonyl isocyanide dichloride as the raw material synthetic isoxazole alcohol . And get a better synthesis conditions . During the experiment , the literature existing methods were improved. Synthesis of isopropyl hydrazine , in the catalytic hydrogenation step selection of a palladium on carbon catalyst in place of the lithium aluminum tetrahydride ; increases the amount of sodium hydroxide used in the hydrolysis step . Appropriate choice of solvent 1,2,4 - trichlorobenzene in synthetic Chlorocarbonyl isocyanide dichloride . In synthetic isoxazole alcohol , using a low-temperature water -phase method instead of the solvent method . Improved than the methods in the literature to improve the reaction yield, and provides a reliable experimental data for the continuous production of industrialization .

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