Heteroaryl-Substituted Cyclopentane Diones for Selective Weed Control
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Solution Overview
Problem
Current herbicidal compounds lack efficacy in selectively targeting weeds while minimizing impact on crops, leading to residual soil contamination and environmental concerns.
Innovation Solution
Development of novel herbicidally active heteroaryl diones, specifically 2-heteroaryl-cyclopentane-1,3-diones, which are designed to effectively control weeds with reduced soil persistence and improved crop safety through specific biochemical processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional herbicidal compounds are used to control weeds, then weed control efficacy is achieved, but crop safety is compromised and soil residual contamination increases
Solution Approach 1:
The patent applies local quality by introducing specific heteroaryl substituents (pyridyl, pyrimidinyl, triazinyl, thienyl, furyl, oxazolyl, isoxazolyl, thiazolyl, isothiazolyl) at specific positions of the cyclopentane-1,3-dione core structure. These localized structural modifications create compounds with enhanced selectivity between weed and crop sites, allowing effective weed control while improving crop safety and reducing non-target environmental impacts.
Solution Approach 2:
The patent employs parameter changes by systematically varying substituents R1-R6, G, and the heteroaryl group Q in the general formula (I). This includes changing the type of heteroaryl group, its substitution pattern, and the nature of R groups to optimize the balance between herbicidal activity, crop tolerance, and environmental persistence, thereby resolving the contradiction between efficacy and safety.
2Productivity
If herbicidal compounds with high efficacy are applied, then weed control is improved, but environmental persistence and residual contamination worsen
Solution Approach 1:
The patent applies dynamics by designing compounds with optimal metabolic stability characteristics. The heteroaryl-substituted cyclopentane-1,3-dione structures are engineered to maintain sufficient persistence in soil to provide effective weed control, while simultaneously being susceptible to microbial degradation and metabolic transformation, ensuring they do not accumulate to harmful levels in the environment.
Solution Approach 2:
The patent embodies the principle of disposable compounds by creating herbicides that perform their function effectively and then degrade into harmless or low-toxicity metabolites. The specific heteroaryl substitutions facilitate this controlled degradation, allowing the compound to be 'used up' after providing the necessary weed control effect, minimizing long-term environmental persistence.
3Adaptability or versatility
If broad-spectrum herbicidal activity is achieved, then weed control coverage is improved, but selectivity between weeds and crops deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the herbicidal activity into specific molecular interactions. The heteroaryl substituents (particularly nitrogen-containing rings like pyridyl, pyrimidinyl, and triazinyl) are positioned to interact with specific biological targets in weed plants, while the overall molecular structure is designed to be recognized differently by crop plant enzymes, achieving both broad weed spectrum and crop selectivity through differentiated molecular recognition.
Data Source
AI summary
The invention relates to a compound of formula (I), which is suitable for use as a herbicide wherein G is hydrogen or an agriculturally acceptable metal, sulfonium, ammonium or latentiating group; Q is a unsubstituted or substituted C3-C8 saturated or mono-unsaturated heterocyclyl containing at least one heteroatom selected from O, N and S, or Q is heteroaryl or substituted heteroaryl; m is 1, 2 or 3; and Het is an optionally substituted monocyclic or bicyclic heteroaromatic ring; and wherein the compound is optionally an agronomically acceptable salt thereof.