- Synthetic process of herbicide tembotrione
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The invention discloses a synthetic process of herbicide tembotrione. The synthetic process comprises the following steps: step 1) adding methyl 2-chloro-3-methyl-4-methylsulfonylbenzoate, a solvent,a catalyst and hydrobromic acid at the first, then dropwise adding hydrogen peroxide, washing with water, concentrating and recrystallizing after reaction to obtain bromine methyl 2-chloro-3-bromomethyl-4-methylsulfonylbenzoate; step 2) enabling the bromide, an alkali 1, the catalyst, the solvent and 2,2,2-trifluoroethanol to react, filtering, washing with water and concentrating after reaction; adding an alkali 2 and water to react, acidifying, filtering, washing and drying to obtain an etherate 2-chloro-3-(2,2,2-trifluoroethoxy)methyl-4-methanesulfonylbenzoic acid; and step 3) removing the solvent after reacting the etherate, the catalyst, thionyl chloride and the solvent; adding 1,3-cyclohexanedione and the solvent, dropwise adding triethylamine; adding acetone cyanohydrin after reaction, washing with water, layering, removing the solvent from an oil layer, adding the solvent for recrystallization, filtering and drying to obtain a beige solid, namely tembotrione. The synthetic process provided by the invention increases the yield of an intermediate, is more environmentally-friendly and safer, and reduces production costs.
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Paragraph 0036; 0038; 0039; 0040; 0047; 0049; 0050; 0051
(2019/05/08)
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- Weeding corrosion inhibition granule and preparation method thereof
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The invention provides a weeding corrosion inhibition granule and a preparation method thereof, and belongs to the technical field of a herbicide. The raw materials of the weeding corrosion inhibitiongranule comprise a phase A and a phase B, wherein the p
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Paragraph 0023; 0048-0049; 0051
(2019/04/10)
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- Tefuryltrione intermediate and preparation method thereof
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The invention provides a tefuryltrione intermediate and a preparation method thereof. Firstly, 2-chloro-3-methyl-4-methylsulfonylbenzoic acid as a raw material is subjected to an esterification reaction with methanol, and 2-chloro-3-methyl-4-methylsulfony
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Paragraph 0033; 0035; 0037; 0039; 0041; 0043
(2019/03/08)
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- Preparation method for tefuryltrione
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The invention provides a preparation method for tefuryltrione, and belongs to the technical field of compound preparation. The preparation method comprises the following steps that esterification reaction is carried out on 2-chloro-3-methyl-4-methylsulfon
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Paragraph 0034; 0036; 0039; 0041; 0044; 0046
(2019/04/10)
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- 3-bromomethyl-2-halo-4-alkylsulfonylbenzoate preparation method
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The invention relates to the field of pesticides, and discloses a 3-bromomethyl-2-halo-4-alkylsulfonylbenzoate preparation method, which comprises: in the presence of an acid and an initiator, carrying out a contact reaction on a substrate compound, a bro
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Paragraph 0050-0051; 0058; 0059; 0061-0062; 0065; 0068
(2018/09/11)
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- Preparation method of 3-bromomethyl-2-halogeno-4-alkylsulfonylbenzoate
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The invention relates to the field of compound preparation and discloses a preparation method of 3-bromomethyl-2-halogeno-4-alkylsulfonylbenzoate. The preparation method comprises that a substrate compound and a bromate undergo a contact reaction in the p
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Paragraph 0047; 0048; 0049
(2017/02/02)
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- Benzoyl compound, composition containing benzoyl compound and application of benzoyl compound
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The invention discloses a benzoyl compound, a composition containing the benzoyl compound and application of the benzoyl compound. The formula of the benzoyl compound is as shown in the specification, wherein A, B, X and R are as defined in the specification. The benzoyl compound has high growth inhibition activity on various broad-leaf weeds and gramineae weeds, has no evident phytotoxicity on wheat, has good crop safety, and is few in synthesizing steps, simple in preparation method, low in preparation cost and suitable for large-scale industrial production.
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Paragraph 0089; 0090
(2016/11/14)
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- Process for synthesis of Triketone-based herbicide link sulphur grass alkone
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The invention relates to a process for synthesizing triketone herbicide cyclic sulcotrione. The method comprises the following steps: (1) synthesizing 2-chloro-6-methylsulfonyl methylbenzene; (2) synthesizing 2-chloro-3-acetyl-6-methylsulfonyl methylbenzene; (3) synthesizing 2-chloro-3-methyl-4-methylsulfonyl benzoic acid; (4) synthesizing methyl 2-chloro-3-methyl-4-methylsulfonyl benzoate; (5) synthesizing methyl 2-chloro-3-bromomethyl-4-methylsulfonyl benzoate; (6) synthesizing 2-chloro-3-(2,2,2-trifluoroethyoxy)methyl-4-methylsulfonyl benzoic acid; (7) synthesizing 2-chloro-3-(2,2,2-trifluoroethyoxy)methyl-4-methylsulfonyl benzoic acid 3-oxo-1-cyclohexene ester; and (8) synthesizing cyclic sulcotrione. The process disclosed by the invention has the beneficial effects that the reaction steps are reduced, the reaction time is shortened, and the yield of intermediates is improved; the reaction conditions are mild and safe; and the cost is reduced.
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Paragraph 0048-0050
(2016/11/24)
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- Substituted 2-benzoyl-cyclohexan-1,3-diones with herbicidal effect
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The invention relates to 2-benzoylcyclohexane-1,3-diones of the formula I where R1, R2are each hydrogen, nitro, halogen, cyano, thiocyanato, alkyl, haloalkyl, alkoxyalkyl, alkenyl, alkynyl, —OR5, —OCOR6, —OSOsu
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- Benzoylcyclohexanediones, process for their preparation and their use as herbicides and plant growth regulators
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Benzoylcyclohexanediones of the formula (I), process for their preparation and their use as herbicides and plant growth regulators are described. In this formula (I), R11, R2, R3, R4, R5, R6and R7are various radicals, L is an alkylene chain, and Y and Z are a monoatomic bridge element.
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- Isoxazolyl- and isoxazolinyl-substituted benzoylcyclohexanediones, process for their preparation and their use as herbicides and plant growth regulators
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Isoxazolyl- and isoxazolinyl-substituted benzoylcyclohexanediones, process for their preparation and their use as herbicides and plant growth regulators. Benzoylcyclohexanediones of the formula (I), process for their preparation and their use as herbicides and plant growth regulators are described. In formula (I) R1, R2, R3, R4, R5, R6, R7, Ra, Rb, and Rcare various radicals and Y and Z are a monoatomic bridge element.
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- Substituted 4-benzoylpyrazoles
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PCT No. PCT/EP97/07210 Sec. 371 Date Jun. 23, 1999 Sec. 102(e) Date Jun. 23, 1999 PCT Filed Dec. 19, 1997 PCT Pub. No. WO98/29392 PCT Pub. Date Jul. 9, 1998The invention relates to 4-benzoylpyrazoles of the formula I and their agriculturally useful salts
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- 2-Anylocyclohexanediones having improved herbicidal properties
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Benzoyl derivatives of the formula I STR1 where Z is a 5-membered or 6-membered heterocyclic, saturated or unsaturated radical containing one to three hetero atoms selected from the group consisting of oxygen, sulfur and nitrogen, Q is a cyclohexane-1, 3-
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- Isoxazolylbenzoyl derivatives
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Isoxazol-4-ylbenzoyl derivatives of the formula I STR1 where the substituents have the meanings described in the specification; and agriculturally customary salts thereof.
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- Herbicidally active pyrazol-4-ylbenzoyl compounds
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Pyrazol-4-ylbenzoyl compounds of the formula I STR1 where Z is a 5- or 6-membered heterocyclic saturated or unsaturated radical, Q is a pyrazole ring and L and M are as defined in the specification, their use as herbicidal compounds and to processes for p
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- Herbicidally active phenyldiketone compounds
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Herbicidally active phenyldiketone compounds of the formula I STR1 in which the substituents have the following meanings: L and M are hydrogen, C1 -C6 -alkyl, C2 -C6 -alkenyl, C2 -C6 -alkyn
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