- Synthesis method of agricultural herbicide
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The invention discloses a synthesis method of an agricultural herbicide. The method comprises the following steps of: adding a solvent X, a substrate and ammonium formate into a reaction kettle, carrying out reaction for 4h under 90DEG C, adding MOH, carrying out heat preservation reaction for 2 hours, carrying out reduced pressure distillation to remove the solvent X, performing cooling 25 DEG Cand adding hydrochloric acid to adjust the pH value to 7, adding ethyl acetate, performing stirring and liquid separation; adding ethyl acetate, performing stirring and extracting, merging organic phases, performing pressurized distillation, performing concentration to obtain 2-amino-1-cyclopentenecarboxylic acid; adding a solvent Y into another reaction kettle, then adding the 2-amino-1-cyclopentenecarboxylic acid and a carbonylation reagent, heating to react for 6h, absorbing tail gas, combining wastewater, concentrating the solvent Y until no liquid flows out, adding the solvent Y and cyclohexylamine, heating and refluxing for 6h, performing cooling and centrifugal filtering, adding a filter cake into the solvent Y, heating and stirring for 1h, performing cooling and centrifugal filtering, and performing drying in vacuum to obtain a product; and heating wastewater, performing reduced pressure distillation, adding methyl alcohol and performing stirring and filtering after solid precipitation, leaching a filter cake with methyl alcohol, and conducting vacuum drying so as to obtain white sandy solid of which the reaction general formula is described in the descriptions of the invention.
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Paragraph 0015; 0017-0019; 0021-0023; 0025-0027; 0029-0031
(2020/12/10)
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- Halopyridyl triazolinone herbicides and herbicidal use thereof
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Disclosed are herbicidal halopyridyl triazolinones, herbicidal compositions comprising the halopyridyl triazolinones, and herbicidal use of the compounds and compositions. Such compounds and compositions are useful as both preemergence and postemergence herbicides in a variety of crops.
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- 5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides
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5,6-Dihydro-1,2,4,6-thiatriazin-5-one-1,1-dioxides of the formula STR1 where R1 is hydrogen, a metal atom or an unsubstituted or substituted ammonium radical, R2 is a saturated or unsaturated straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical or 3 to 7 carbon atoms, a branched saturated or unsaturated aliphatic radical of 3 to 10 carbon atoms, a halogen-, alkoxy- or alkylmercapto-substituted aliphatic radical of 2 to 10 carbon atoms tetrahydrofuryl substituted methyl, a cycloalkoxy-substituted aliphatic radical of 4 to 10 carbon atoms, unsubstituted or halogen-substituted benzyl or phenyl, halophenyl, or alkylphenyl of a total of up to 10 carbon atoms, R3 is hydrogen, a straight-chain aliphatic radical of up to 10 carbon atoms, a cycloaliphatic radical of 3 to 7 carbon atoms, a branched aliphatic radical of 3 to 10 carbon atoms, haloalkyl, or alkoxyalkyl of 2 to 10 carbon atoms and X is oxygen and may also be sulfur if R2 is unsubstituted or halogen-substituted benzyl, processes for their preparation, and herbicides containing the above compounds.
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- 4,5-Dichloroimidazole-2-carboxylic acid derivatives
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4,5-Dichloroimidazole-2-carboxylic acid derivatives of the formula STR1 in which the group STR2 represents a carbon atom which has three bonds to hetero-atoms, and their salts with bases, possess insecticidal, acaricidal, fungicidal, nematicidal and herbicidal properties.
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