Isoxazoline Aromatic Herbicide Composition for Crop-Selective Weed Control
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Solution Overview
Problem
Existing herbicides lack satisfactory herbicidal properties against harmful plants and selectivity to crops, leading to issues such as weed resistance, service life, and environmental concerns.
Innovation Solution
Development of substituted-isoxazoline-containing aromatic compounds with specific structural formulas that exhibit excellent herbicidal activity against gramineous and broadleaf weeds while maintaining high selectivity for crops, including transgenic crops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicides are used, then weed control is achieved, but herbicidal properties and selectivity to crops are not satisfactory
Solution Approach 1:
The patent applies parameter changes by systematically modifying the chemical structure of herbicide compounds through varying substituents (R1-R8, X1-X4, Q, Y, Z) to optimize both herbicidal activity and crop selectivity. Different substitution patterns on the isoxazoline and aromatic rings create compounds with tailored properties for enhanced reliability while reducing harmful effects on crops.
Solution Approach 2:
The invention employs composite materials by combining the isoxazoline core structure with various aromatic substituents and heterocyclic groups to create hybrid molecular structures. These composite molecular architectures achieve synergistic effects that improve herbicidal properties while maintaining selectivity, as evidenced by the diverse structural variants presented in the patent.
2Reliability
If existing herbicides are used, then weed control is achieved, but weed resistance develops
Solution Approach 1:
The patent addresses weed resistance by changing the chemical parameters of herbicide molecules through diverse substitution patterns. The varied structural configurations (different R groups, heterocyclic attachments, and aromatic substitutions) create novel molecular profiles that differ from existing herbicides, thereby overcoming resistance mechanisms while extending the service life of herbicidal treatments.
3Reliability
If existing herbicides are used, then weed control is achieved, but environmental concerns increase
Solution Approach 1:
The patent reduces environmental impact by modifying molecular parameters to create herbicides with improved safety profiles. The specific substitution patterns and molecular weight optimizations result in compounds that maintain herbicidal efficacy while exhibiting reduced persistence and lower toxicity to non-target organisms, thereby decreasing harmful environmental factors.
Data Source
AI summary
The invention belongs to the technical field of pesticides, and specifically relates to a type of substituted-isoxazoline-containing aromatic compound, preparation method therefor, herbicidal composition and use thereof. The compound is as shown in general formula I:Wherein, Q representsY represents halogen, halogenated alkyl or cyano; Z represents halogen; X1, X2 each independently represent hydrogen, halogen, alkyl, etc.; X3 represents halogen, cyano, etc.; X4 each independently represents —COOR5 or -alkyl-COOR5; R5 each independently represents hydrogen, alkyl, etc. The compound has excellent herbicidal activity against gramineous weeds, broadleaf weeds, and so on even at low application rates, and has high selectivity for crops.