Pyridine N-Oxide Compounds for Resistant Pest Control
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Solution Overview
Problem
Existing insecticides and acaricides face challenges such as chemical resistance, phytotoxicity, soil pollution, and toxicity to livestock and fish, while also struggling to effectively control resistant pest strains.
Innovation Solution
A pyridine N-oxide compound with specific substituents and derivatives, including stereoisomers, tautomers, and salts, which exhibit excellent insecticidal and acaricidal activity with reduced safety risks and industrial synthesis feasibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing insecticides and acaricides are used, then pest control activity is achieved, but chemical resistance develops and safety issues arise
Solution Approach 1:
The patent modifies the chemical structure of pyridine N-oxide compounds by changing substituent parameters (R1, R2, X groups) to create novel compounds with improved pest control activity and reduced chemical resistance. The specific structural parameters are optimized to achieve better efficacy while maintaining safety profiles.
Solution Approach 2:
The patent creates composite chemical structures by combining pyridine N-oxide core with various substituent groups (alkylsulfonyl, alkoxy, alkylthio, etc.) to produce compounds that exhibit both high pest control activity and improved safety characteristics, effectively combining multiple functional elements in a single molecule.
2Reliability
If conventional insecticides are applied, then pest control is achieved, but phytotoxicity and soil pollution occur
Solution Approach 1:
The patent introduces specific local substituent groups (such as C1-6 alkylsulfonyl at R1 position) that provide targeted pest control activity while the overall molecular structure maintains low phytotoxicity and soil pollution characteristics. The local functional groups are optimized for pest interaction without causing harmful effects to plants or soil.
3Reliability
If existing pest control compounds are used, then resistant pest strains are controlled, but toxicity to livestock and fish increases
Solution Approach 1:
The patent creates novel pyridine N-oxide compounds that copy the effective pest control mechanism of conventional insecticides while modifying the molecular structure to reduce toxicity to non-target organisms. The core activity is preserved through structural analogy while safety is improved through specific substituent modifications.
Data Source
AI summary
An object of the present invention is to provide a pyridine N-oxide compound that is excellent in pest control activity, particularly, insecticidal activity and/or acaricidal activity, is excellent in safety, and may be industrially advantageously synthesized. The pyridine N-oxide compound of the present invention is a compound of the formula (II), a stereoisomer, tautomer or hydrate thereof or a salt of any of these compounds, wherein R1 represents a substituted or unsubstituted C1-6 alkylsulfonyl group; R2 represents a hydrogen atom, a substituted or unsubstituted C1-6 alkyl group, or the like; A1 represents an oxygen atom, a sulfur atom, or the like; A2 and A3 each independently represent a carbon atom or a nitrogen atom; X represents a substituted or unsubstituted C1-6 alkyl group, a substituted or unsubstituted C1-6 alkoxy group, or the like; and n represents an integer of 0 to 2.