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Compound and weeding composition, and application of

A herbicidal composition and compound technology, applied in the directions of herbicides and algicides, applications, biocides, etc., can solve problems such as insufficient herbicidal activity, and achieve broad-spectrum control, good compatibility, and good control of harmful plants. Effect

Active Publication Date: 2021-06-29
周银平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the herbicidal activity of these known compounds is insufficient especially at low application rates, and / or their compatibility with crop plants still deserves improvement

Method used

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  • Compound and weeding composition, and application of
  • Compound and weeding composition, and application of
  • Compound and weeding composition, and application of

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0142] This embodiment relates to the preparation of compound 21 in Table 1:

[0143]

[0144] 3.7 grams of 2,4,6-trichloro-1,3,5-triazine (0.02mol), 2.3 grams of 1-methylhydantoin (0.02mol), 3 grams of triethylamine (0.029mol), 80 milliliters of acetonitrile was added into a 250 milliliter four-neck flask, the temperature was raised to 60° C., and the reaction was stirred for 1 hour. After the reaction was completed, the solvent was removed, and 100 milliliters of water was added. Extract with 100 ml ethyl acetate. Column chromatography yielded 5.2 g of the product. Goo. δppm 4.21 (2H, s), 3.22 (3H, s).

Embodiment 2

[0146] This embodiment relates to the preparation of compound 2 in Table 1:

[0147]

[0148] Add 2.6 grams of compound 21 (0.01mol), 3 grams of potassium carbonate (0.021mol), 80 milliliters of acetonitrile, and 20 grams of water into a 250 milliliter four-neck flask, heat up to 60°C, and stir for 3 hours. After the reaction is complete, the Solvent, add 50 milliliters of water, adjust pH=5 or so with hydrochloric acid. Extract with 100 ml ethyl acetate. Column chromatography yielded 1.8 g of product with a melting point of 120-122°C. δppm 4.09 (2H, s), 3.09 (3H, s).

Embodiment 3

[0150] This embodiment relates to the preparation of compound 9 in Table 1:

[0151]

[0152] At room temperature, 2.25 g of compound 2 (0.01 mol), 0.8 g of sodium hydroxide (0.02 mol), and 60 g of methanol were added into a 250 ml four-neck flask, stirred at room temperature for 1 hour, and the solvent was removed under reduced pressure to obtain 2.9 g of the product. The melting point is 280-282°C. δppm 3.92 (2H, s), 2.97 (3H, s).

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PUM

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Abstract

The invention provides a compound and a weeding composition, and application thereof. The compound comprises a compound as shown in a general formula (I), N-oxide of the compound as shown in the general formula (I) and salt of the compound as shown in the general formula (I). The compound or the weeding composition disclosed by the invention has broad-spectrum weeding activity, has a good control effect on barnyard grass, green bristlegrass, digitaria sanguinalis, amaranthus retroflexus and the like, and can be used for wheat, soybeans, rice, corn, orchards, uncultivated areas and the like to control various malignant weeds.

Description

Technical field [0001] The present invention relates to the technical field of agricultural herbicides, and specifically to a compound, a herbicidal composition and its use. Background technique [0002] Substituted hydantoins having herbicidal properties are described in numerous documents. Such as: WO2016071364A2, CN109790150A, CN105636439A, CN105658637A, WO2016 / 071361, WO2016 / 071362, WO2016 / 071363 and WO2016 / 071364, etc. However, the herbicidal activity of these known compounds is insufficient, especially at low application rates, and / or their compatibility with crop plants still deserves improvement. [0003] The primary object of the present invention is to provide compounds with herbicidal activity (herbicides) which are very effective against economically important harmful plants even at relatively low application rates and which can be selectively used on crop plants, and further, these The compound has good activity in controlling harmful plants and has good compa...

Claims

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Application Information

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IPC IPC(8): C07D403/04A01N43/66A01P13/00
CPCC07D403/04A01N43/66
Inventor 周银平
Owner 周银平
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