- Preparation method 1 - phenyl -3 - (1, 2, 3 - thiadiazol -5 -yl) urea (by machine translation)
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The 1 -phenyl -3 - (1, 2, 3 -thiadiazol -5 -yl) urea is prepared by reacting 5 amino -1.2.3 - thiadiazole as a raw material, adding a compound solvent, carrying out suction filtration, washing and drying to obtain a pale yellow solid, and obtaining 1 - phenyl -3 - (1, 2 and 3 - thiadiazol -5 -yl) urea. The preparation method has the beneficial effects that the reaction conditions are mild and controllable, the yield is high, the obtained product is high in quality, the solvent boiling point is high, the recovery is convenient, the loss is less, the production cycle is shortened, the solvent recovery utilization rate is all 95% or more, and the product yield is high. (by machine translation)
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Paragraph 0024-0033
(2020/10/21)
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- Selenium-catalyzed oxidative carbonylation of 1,2,3-thiadiazol-5-amine with amines to 1,2,3-thiadiazol-5-ylureas
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A facile one-pot, economical approach to 1,2,3-thiadiazol-5-ylureas was developed via selenium-catalyzed oxidative carbonylation of 1,2,3-thiadiazol-5-amine with a series of amines in one-pot manner in the presence of CO and O2. This approach is featured with cheap and easily available raw materials, cheap and reusable catalyst selenium, one-pot procedure, high atomic economy, simple operations and no emission of corrosive wastes.
- Zhang, Xiaopeng,Dong, Shuxiang,Ding, Qianqian,Fan, Xuesen,Zhang, Guisheng
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supporting information
p. 375 - 378
(2018/08/07)
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- Plant-protective pesticidal composition
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The invention relates to a plant-protective solution containing 2.5 to 40 % by weight of one or more water-insoluble plant-protective ingredient(s) 20 to 71.5 % by weight of dimethylformamide and/or dimethylsulfoxide and/or acetone as water-miscible solvent, 10 to 71.5 % by weight of furfurol and/or furfuryl alcohol as partially water-miscible solvent, 1 to 15 % by weight of commonly used additives such as anionic and/or nonionic surface active agents and macromolecules. The invention also relates to the ready-for-use plant-protective suspension containing 0.2 to 10 % by weight of one or more water-insoluble plant-protective ingredient(s) with a particle size of 0.1 to 50 μm, 0 to 60 % by weight of a fertilizer, 0.2 to 10 % by weight of dimethylformamide and/or dimethylsulfoxide and/or acetone as water-miscible solvent, 0.2 to 10 % by weight of furfurol and/or furfuryl alcohol as partially water-miscible solvent, 0.05 to 2.5 by weight of a commonly used additive such as anionic and/or nonionic surface active agents macromolecules and water in an amount supplementing up to 100 % by weight.
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- Composition for defoliating plants
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New compositions for defoliating plants possessed of synergistic activity comprising (A) a compound of formula I STR1 in which R1 is hydrogen or C1 -C4 -alkyl, R2 is hydrogen, C1 -C4 -alkyl, C1 -C4 -alkoxy or C1 -C4 -alkylthio, R3 is hydrogen, C1 -C4 -alkyl, C1 -C4 -alkoxy, C1 -C4 -alkylthio or C3 -C8 -cycloalkyl, wherein R2 and R3 taken together with the nitrogen atom to which they are attached is a morpholino- piperidino- or pyrrolidino-group, X is oxygen or sulfur, Y can be the same or different and is hydrogen, halogen, C1 -C4 -alkyl, C1 -C4 -alkoxy, C1 -C4 -alkoxy-C1 -C2 -alkyl, C1 -C4 -alkylthio, trifluoromethyl or nitro, and n is the number 1, 2, 3, 4 or 5, in combination with (B) a defoliant for plants in a proportion of 1 to 99 parts by weight of component (A) to 99 to 1 parts by weight of component (B). As the defoliant there can be employed 1,2,3-thiadiazole-5-yl-urea derivatives, 1,2,3-thiadiazole-5-carboxylic acid derivatives, benzylaminopurine derivatives, 2,3-dihydro-5,6-dimethyl-1,4-dithiine-1,1,4,4-tetroxide, 1,1'-dimethyl-4,4'-bipyridilium-dichloride, sodium chlorate and S,S,S-tributylphosphortrithioate. The compositions of the invention are especially suitable for use in the defoliation of cotton plants.
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- Process for the preparation of 1,2,3-thiadiazol-5-yl ureas
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A process for the preparation of 1,2,3-thiadiazol-5-yl ureas of the general formula STR1 in which a 1,2,3-thiadiazol-5-carbohydroxam acid derivative of the formula STR2 is dissolved in an inert organic solvent with an acid halide of the formula to form an acylated derivative which then reacts with an amine of the formula STR3 to form the desired product.
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