- Preparation method of mesosulfuron-methyl
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The invention relates to a preparation method of mesosulfuron-methyl. The method comprises the following steps: taking 4-cyano-2-nitrobenzoate as a starting raw material; firstly performing a nucleophilic substitution reaction with benzyl mercaptan; then, performing reduction hydrogenation by using raney nickel, performing methylsulfonyl acidylation by using methylsulfonyl chloride; then, performing chlorination by using chlorine gas and performing ammoniation by using ammonia gas to obtain a key intermediate, namely 2-methoxycarbonyl-5-methanesulfonyl ammonia toluenesulfonamide; and finally,performing condensation to obtain a target product, namely the mesosulfuron-methyl. A route of the method is mild in reaction process condition; the operation is easy; the method is suitable for industrial mass production; less environmental pollution is caused; and the method is a relatively good novel method for synthesizing the mesosulfuron-methyl.
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- A preparation method of the methyl two sulphur are prosperous
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The invention relates to a preparation method of the methyl two sulphur are prosperous, to the bromobenzene formaldehyde as the starting material, the nitration reaction occurs first, then and cuprous cyanide reaction, the bromine takes on behalf of the c
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- SYNERGISTIC HERBICIDAL COMPOSITION AND USE THEREOF
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A herbicidal composition is provided, the composition comprising: (A) the crystalline modification I of 2-(4-mesyl-2-nitrobenzoyl)cyclohexane-1,3-dione (mesotrione); and (B) the crystalline modification I of methyl 2-[(4,6-dimethoxypyrimidin-2-ylcarbamoyl
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Paragraph 0077
(2017/06/27)
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- A method for preparing the methyl two sulphur are prosperous (by machine translation)
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The invention discloses a method for synthesizing the methyl two sulphur are prosperous, belongs to the pesticide chemical field, the synthetic method is to 4 - chloro - 2 - aminobenzoic acid as the raw materials, by esterification, diazo, through sulfur dioxide, oxychloride, ammoniation ring, nitrogen methylation, carbonitriding, reduction, open-loop, a sulfonylation and condensation of the eleven step to make the methyl two sulphur are prosperous. The invention synthetic the methyl two sulphur are prosperous, the raw material is cheap, simple operation, mild condition, low equipment requirements, high yield, is suitable for industrial production, and the practicability is strong. (by machine translation)
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