Substituted Pyrimidyloxy Pyridine Derivatives for Selective Herbicide Control
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Solution Overview
Problem
Current herbicides for controlling undesirable vegetation in crops and noncrop areas are often ineffective, costly, toxic, and environmentally harmful, lacking compounds with new sites of action for selective weed control.
Innovation Solution
Development of substituted pyrimidyloxy pyridine derivatives, their N-oxides, and salts, which form agricultural compositions used as herbicides, offering a herbicidally effective solution for controlling unwanted vegetation by targeting specific sites of action in crops such as rice, soybean, and sugar beet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicides are used to control undesirable vegetation, then weed control is achieved, but they are ineffective, costly, and environmentally harmful
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of herbicide molecules through specific substitutions at defined positions in the pyrimidine and pyridine rings. By systematically varying substituents (R1, R2, R3, Q groups) and their configurations, the invention creates compounds with optimized herbicidal activity and reduced environmental toxicity, resolving the contradiction between effectiveness and environmental safety
Solution Approach 2:
The patent employs composite material principles by combining multiple heterocyclic ring systems (pyrimidine and pyridine) with various functional groups to create complex molecular structures. These composite molecular architectures achieve superior herbicidal performance while maintaining environmental compatibility, addressing both effectiveness and environmental concerns simultaneously
2Adaptability or versatility
If existing herbicides are used for weed control, then vegetation control is achieved, but they lack new sites of action for selective control
Solution Approach 1:
The patent applies local quality principles by introducing specific functional groups and substituents at particular positions (R1, R2, R3, Q) of the molecular structure. These localized modifications create compounds with specific binding affinities to target sites in weed enzymes, enabling selective control while maintaining effectiveness against undesirable vegetation
3Productivity
If conventional herbicides are applied to control weeds, then weed growth is suppressed, but crop productivity is reduced due to cost and environmental factors
Solution Approach 1:
The patent applies the principle of cost-effective solutions by developing herbicide compounds that can be synthesized from readily available starting materials through efficient chemical reactions. The compounds are designed to be used at optimal concentrations to achieve weed control without requiring excessive application rates, thereby reducing production costs while maintaining crop productivity
Data Source
AI summary
Disclosed are compounds of Formula 1, including all stereoisomers, N-oxides, and salts thereof, wherein Q, Z, R2, R3 and m are as defined in the disclosure. Also disclosed are compositions containing the compounds of Formula 1 and methods for controlling undesired vegetation comprising contacting the undesired vegetation or its environment with an effective amount of a compound or a composition of the invention.