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Herbicidal composition

A technology of herbicidal composition and compound, applied in the direction of herbicide, algicide, biocide, animal repellent, etc., which can solve the problem of long-term growth of weeds

Inactive Publication Date: 2012-04-18
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are many kinds of weeds to be controlled and weeds grow for a long time

Method used

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Examples

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Embodiment

[0514] The present invention will be specifically illustrated by the following Preparation Examples, Formulation Examples and Test Examples, but the present invention is not limited to these Examples.

[0515] Herein, the term "parts" means parts by weight.

preparation Embodiment 1

[0517] 3.193 g of 4-(2-ethylphenyl)-5-methoxy-2-methyl-3 (2H)-pyridazinone [compound II-1], 50 mL of water, 4.657 g of hydrogen Potassium oxide (purity: 85%) and 5 mL of 1,4-bis The mixture of alkanes was heated at reflux for 36 hours. The reaction mixture was cooled. To the reaction mixture were added concentrated hydrochloric acid, 10 mL of water and 100 mL of ethyl acetate. Insoluble materials in the mixture were removed by filtration, and the filtrate phases were separated. The organic layer was washed successively with water and a saturated aqueous sodium chloride solution, dried over anhydrous magnesium sulfate, and then concentrated. The residue was washed with ethyl acetate-hexane mixed solvent (1:2) to obtain 2.050 g of 4-(2-ethylphenyl)-5-hydroxyl-2-methyl-3(2H) as colorless crystals - Pyridazinone [Compound I-a-1].

[0518] Compound I-a-1 and other compounds prepared in the same manner as in Preparation Example 1 are shown in Table 1.

[0519] Compound repres...

preparation Embodiment 2

[0524]Under nitrogen atmosphere, at room temperature, after about 1 hour, 1.9 g of 2-[2-(2,6-diethyl-4-methylphenylacetyl)-2-methylhydrazinylidene] A solution of ethyl propionate [compound VI-2] in 55 mL of toluene was added dropwise to a solution (1 mol / L) of potassium tert-butoxide in tetrahydrofuran (13 mL). The mixture was stirred at room temperature for 30 minutes. The reaction mixture was concentrated under reduced pressure. To the obtained residue was added 30 mL of ice water, followed by washing with tert-butyl methyl ether (20 mL×2). 1.6 g of 35% hydrochloric acid was added to the aqueous layer, followed by extraction with ethyl acetate (20 mL×3). The organic layer was washed with saturated aqueous sodium chloride solution (20 mL×2), dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The obtained residue was subjected to silica gel column chromatography (ethyl acetate:hexane=1:3) to obtain 0.76 g of a solid. The solid was washed with ...

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Abstract

There is provided a herbicidal composition containing compound represented by the formula (I) : a compound represented by the formula (I) : wherein R1 represents a C1 - 6 alkyl group etc., R2 represents hydrogen etc., G represents hydrogen etc., Z1 represents a C1 - 6 alkyl group, Z2 represents a C1- 6 alkyl group, and n represents 0, 1, 2, 3 or 4; at least one compound selected from Group A consisting of metsulfuron- methyl, thif ensulf uron-methyl, etc.; and at least one compound selected from Group B consisting of f enchlorazole- ethyl, cloquintocet-mexyl, and mef enpyr-diethyl.

Description

Technical field [0001] The present invention relates to a herbicidal composition. Background technique [0002] In today's society, a lot of herbicides are used. However, there are many types of weeds to be controlled and weeds grow for a long time. Therefore, there is a need for herbicides with high herbicidal activity, broad spectrum herbicidal activity and excellent crop selectivity. [0003] WO 2007 / 119434 discloses specific pyridazinone compounds with herbicidal activity. [0004] The present invention provides novel herbicidal compositions. Contents of the invention [0005] The invention provides: [0006] [1] A herbicidal composition (hereinafter referred to as the herbicidal composition of the present invention), which contains a pyridazinone compound represented by formula (I) (hereinafter referred to as the compound of the present invention), at least one compound selected from Group A and at least one compound selected from Group B. [0007] Formula (I): ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N25/32A01N37/34A01N37/40A01N39/04A01N43/40A01N43/42A01N43/56A01N43/58A01N43/653A01N43/90A01N47/36A01P13/02
CPCA01N43/56A01N47/36A01N43/58A01N43/90A01N43/40A01N37/40A01N39/04A01N25/32A01N43/42A01N43/653A01N2300/00
Inventor 大和诚司神义伸
Owner SUMITOMO CHEM CO LTD
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