Compound of alpha, beta and beta, gamma unsaturation carboxylate class of possessing weeding activity

An ester compound, unsaturated technology, applied in organic chemistry, animal repellent, plant growth regulator, etc., can solve the problems that have not been disclosed, and achieve the effect of broad-spectrum herbicidal activity

Active Publication Date: 2005-06-15
SHANGHAI ZHONGHUA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But as shown in the present invention, the α-substituted acid group α, β and β, γ unsaturated carboxylate compounds have not been disclosed

Method used

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  • Compound of alpha, beta and beta, gamma unsaturation carboxylate class of possessing weeding activity
  • Compound of alpha, beta and beta, gamma unsaturation carboxylate class of possessing weeding activity
  • Compound of alpha, beta and beta, gamma unsaturation carboxylate class of possessing weeding activity

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0051] Synthesis of Compound 2:

[0052]

[0053] Add A (R type, 30.0 grams, 0.0804 moles, available from the market) and 80 milliliters of tetrahydrofuran (THF) in a 500 milliliter reaction flask, stir until fully dissolved, add a solution of 3.2 grams of sodium hydroxide and 80 milliliters of water, and stir at room temperature for 5 After 1 hour, the reaction was stopped, and 100 ml of ethyl acetate was added for extraction. The aqueous phase was acidified with concentrated hydrochloric acid to obtain the intermediate acid as a white solid (B1), which weighed 25 g after drying.

[0054]

[0055] Add B1 (20.0 g, 0.058 mol) and 150 ml of dichloromethane into a 250 ml reaction flask, stir, add oxalyl chloride (11.0 g, 0.087 mol), 3 drops of DMF, stir at room temperature for 4 hours, concentrate to obtain 23 g of acid chloride , the appearance is a yellow liquid (C1).

[0056]

[0057] Add A1 (0.68 gram, 3.3 mmol) in the reaction bottle of 50 milliliters, triethylamin...

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Abstract

An unsaturated alpha, beta-and beta, gamma-carboxylate with high herbiciding activity is disclosed.

Description

technical field [0001] The present invention belongs to the field of herbicides. Background technique [0002] Because weeds develop resistance to herbicides or compositions thereof over time, there is a continuing need to invent new and improved herbicidal compounds and compositions. In addition, considering economical and environmental factors, it is also necessary to invent herbicides with different mechanisms of action from existing herbicides. [0003] Certain α, β and β, γ unsaturated carboxylic acid ester compounds have been reported as herbicides (USP6251829). However, the α-substituted acid group α, β and β, γ unsaturated carboxylate compounds shown in the present invention have not been disclosed. Contents of the invention [0004] The present invention provides a novel α-substituted acid group α, β and β, γ unsaturated carboxylic acid ester compound, as shown in general formula (I, II): [0005] [0006] in: [0007] R is selected from H, C 1 -C 6 Alkyl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/12A01N43/54A01N43/78C07D241/44C07D277/68C07D319/14
Inventor 李斌相东崔东亮马宏娟张宗俭白丽萍徐龙鹤
Owner SHANGHAI ZHONGHUA TECH CO LTD
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