Fused-Ring 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, necessitating the development of new compounds with high efficacy, safety, and economic benefits while addressing issues such as weed resistance and environmental concerns.
Innovation Solution
A fused-ring substituted aromatic compound represented by a specific general formula, which exhibits excellent herbicidal activity against gramineous and broadleaf weeds at low application rates and high crop selectivity, formulated into a herbicidal composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicides are used, then herbicidal activity is achieved, but selectivity to crops is not satisfactory
Solution Approach 1:
The patent modifies the chemical structure of existing herbicide molecules by introducing specific substituents (halogen, haloalkyl, cyano, nitro, or amino groups at Y position; H, halogen or hydroxy at Z position) and fused ring systems to alter the herbicide's interaction with plant enzymes. These parameter changes in molecular structure enhance both herbicidal activity against weeds and selectivity toward crops by targeting specific biochemical pathways.
Solution Approach 2:
The invention creates composite molecular structures by combining isoxazoline ring systems with uracil compounds and additional fused rings. This composite approach integrates multiple functional moieties into a single molecule, achieving synergistic effects that improve both weed control efficacy and crop safety simultaneously.
2Reliability
If application rate is increased to improve weed control, then herbicidal efficacy is enhanced, but crop safety may be compromised
Solution Approach 1:
The modified chemical structure exhibits enhanced binding affinity and metabolic stability, allowing effective weed control at reduced application rates. The specific substituent patterns and fused ring configurations optimize the herbicide's pharmacokinetic properties, maintaining efficacy while reducing total chemical load on crops.
3Reliability
If new herbicide compounds are developed to address weed resistance, then herbicidal performance is improved, but development complexity increases
Solution Approach 1:
The herbicide molecule is segmented into distinct functional regions: the isoxazoline ring system provides core herbicidal activity, the uracil moiety contributes to metabolic stability, and the various substituents (Y, Z groups) fine-tune selectivity and potency. This modular segmentation allows systematic optimization of each component's contribution to overall performance.
Solution Approach 2:
The core isoxazoline-uracil scaffold serves multiple functions simultaneously: it provides the primary herbicidal mode of action, ensures metabolic stability for persistent activity, and offers multiple positions for substituent attachment to achieve crop selectivity. This multi-functionality reduces the need for entirely new molecular scaffolds when addressing resistance.
Data Source
AI summary
The disclosure relates to the field of pesticide technology, and in particular a type of fused-ring substituted aromatic compound represented by general formula I, preparation method, herbicidal composition and use thereof.