Pyridone Herbicide Composition for Selective Weed Control
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Solution Overview
Problem
Existing herbicides do not effectively address the need for selective weed control in crops, particularly those that are safe for useful plants.
Innovation Solution
Development of pyridone derivatives with specific structural modifications, such as varying substituents, which exhibit enhanced herbicidal activity against weeds while being safe for crops.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicides are used for weed control, then herbicidal activity is achieved, but selectivity and safety for useful plants deteriorates
Solution Approach 1:
The patent applies local quality by introducing a fluorophenyl group at the R2 position of the pyridone ring, creating a specific structural motif that confers selective herbicidal activity. This local structural modification enables the compound to distinguish between weed and crop plants, achieving high herbicidal activity against weeds while maintaining safety for useful plants through the specific chemical properties of the fluorophenyl substituent.
Solution Approach 2:
The patent employs parameter changes by systematically varying substituents at different positions of the pyridone ring structure, particularly introducing fluorine atoms at the R2 position and combining them with specific R1 and R4 substituents. These parameter changes in molecular structure optimize the herbicidal activity while maintaining selectivity, transforming the compound's interaction with target enzymes in weed plants versus crop plants.
2Object-affected harmful factors
If pyridone derivatives with specific substituents are developed, then selectivity for crops is improved, but synthesis complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the pyridone derivative into distinct structural modules: a core pyridone ring, a fluorophenyl group at R2, and variable R1 and R4 substituents. This modular approach allows independent optimization of each segment for safety and activity, while the segmented structure enables systematic synthesis through separate preparation steps for each substituent module.
Solution Approach 2:
The patent applies universality by designing a core pyridone scaffold that can accommodate multiple different substituents at R1, R2, and R4 positions. This universal scaffold provides the basic safe structure for crop plants while allowing various substituent combinations to optimize activity against different weed types, reducing the need to develop entirely new compounds for different applications.
Data Source
AI summary
Compounds of Formula (I) wherein the substituents are as defined in claim 1. The invention further relates to herbicidal compositions which comprise a compound of Formula (I) and to the use of compounds of Formula (I) for controlling weeds, in particular in crops of useful plants.