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Pyrazopyrimidinone compounds and use thereof

A kind of technology of pyrazolopyrimidinone and compound, applied in pyrazolopyrimidinone compound and its application field as herbicide, can solve the problem that pyrazolopyrimidinone compound is not disclosed etc.

Inactive Publication Date: 2007-10-24
中国中化股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the (2-F-4,5-trisubstituted phenyl) pyrazolopyrimidinone compounds shown in the present invention have not been disclosed

Method used

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  • Pyrazopyrimidinone compounds and use thereof
  • Pyrazopyrimidinone compounds and use thereof
  • Pyrazopyrimidinone compounds and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Synthetic example

[0052] Synthesis of compound 1:

[0053] step 1

[0054]

[0055] Add pyrazolamide (19.0 grams, 0.15 moles) and 100 milliliters of toluene into a 250-ml reaction flask, add oxalyl chloride (5 grams, 0.03 moles) and stir at room temperature until no gas is released, slowly heat up to reflux, and react until no gas is released , the solvent was evaporated under reduced pressure, 20 milliliters of o-dichlorobenzene was added to the residue, the temperature was slowly raised until no gas was released, and cooled to room temperature to obtain pyrazolyl isocyanate (5.8 grams, 0.03 mole, yield by 100%) A total of 32 grams of o-dichlorobenzene solution.

[0056] step 2

[0057]

[0058] Add 2-fluoro-4-chloro-5-propargyloxyaniline (1.0 g, 0.005 mol) and 10 ml of toluene into a 50 ml reaction flask, and add pyrazolyl isocyanate (containing o-dichlorobenzene) dropwise under stirring. About 10 grams of the solution, about 0.01 mole, excess), reacted at room temperature for 5 hour...

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Abstract

The invention discloses a pyrazole and pyrimidinone compound having weeding activity represented by formula (I) wherein R1 is selected from C1-C4 alkyl, R2 is selected from C1-C4 alkyl, X is selected from halogen, C1-C6 alkyl, halogenated C1-C6 alkyl or CN, Y is selected from halogen, C1-C6 alkyl, halogenated C1-C6 alkyl, C1-C6 cycloalkyl, C1-C6 alkoxy, C3-C6 alkynoxy, C1-C4 alkoxycarbonyl, C2-C6 enoxycarbonyl, C1-C4 alkoxycarbonyl, C1-C2 alkoxy, X and Y can also form benzo six-member heterocycles. The invention also include the weed control composition containing compounds (I) and method for controlling weeds by using the composition.

Description

technical field [0001] The present invention belongs to the field of herbicides. Specifically, it relates to a pyrazolopyrimidinone compound and its application as a herbicide. 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 pyrazolopyrimidinones have been reported as herbicides (JP57167902). However, the (2-F-4,5-trisubstituted phenyl)pyrazolopyrimidinone compounds shown in the present invention have not been disclosed. Contents of the invention [0004] The object of the present invention is to provide a novel pyrazolopyrimidinone compound, which can be used in agriculture to control various weeds. [0005] Technical scheme of the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D471/04A01N43/90A01P13/00C07D473/04
Inventor 李斌王世辉崔东亮相东徐基东杨华铮
Owner 中国中化股份有限公司