Sulfonamide Composition for Improved Harmful-Arthropod Control
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Solution Overview
Problem
Existing compounds are inadequate in providing effective control over harmful arthropods.
Innovation Solution
A compound represented by formula (I) or its N-oxide, characterized by specific structural components and substituents, exhibits excellent control efficacy against harmful arthropods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing compounds are used for arthropod control, then some level of pest control is achieved, but the control effect is insufficient
Solution Approach 1:
The patent applies parameter changes by modifying the chemical structure of sulfonamide compounds through systematic variation of substituents at specific positions (R1-R6) to optimize biological activity. The invention identifies specific structural parameters (such as introducing electron-withdrawing groups, adjusting molecular weight, modifying steric hindrance) that enhance the control effect on harmful arthropods, transforming ordinary sulfonamides into high-efficacy compounds with improved reliability and productivity in pest control.
2Productivity
If a compound with excellent control effect is developed, then pest control efficacy is improved, but the complexity of compound structure increases
Solution Approach 1:
The patent applies local quality by introducing specific functional groups and substituents at particular positions within the sulfonamide molecular framework. Rather than uniformly complicating the entire molecule, the invention strategically places electron-withdrawing groups (such as fluorine, chlorine, trifluoromethyl) at specific R positions to locally enhance biological activity. This localized modification approach achieves high control efficacy while maintaining reasonable structural complexity and synthetic feasibility.
Data Source
AI summary
The present invention provides a compound represented by formula (I) or an N oxide thereof that exhibits an excellent control effect on harmful arthropod , in which, in the formula, Q represented by the following formula, in which, in the formula, # represents a binding site to the sulfur atom, and • represents a binding site to Het and represents a group represented by formula Q1 or the like; R2a and R2b are identical to or different from each other, and each represents a C1-C6 alkyl group optionally substituted with one or more halogen atoms or the like; R3a, R3b, and R3d are identical to or different from each other, and each represents a hydrogen atom or the like; Het represents a group represented by formula Het 5 or the like; A2 represents NR5a or CR4aR4d; A3 represents CR4bR4e; W1 represents an oxygen atom or a sulfur atom; when Het is a group represented by formula Het 5, B1, B2, and B3 represent, as a combination, a combination in which B1 is CR6e, B2 is a nitrogen atom or CR6b, and B3 is a nitrogen atom or CR6d or the like; R4a, R4b, R6a, R6b, and R6c are identical to or different from each other, and each represents a hydrogen atom or the like; R4d and R4e are identical to or different from each other, and each represents a hydrogen atom or the like; R6e represents a C1-C6 chain hydrocarbon group substituted with one or more substituents selected from a group consisting of a cyano group and a halogen atom or the like; and R5a represents a hydrogen atom or the like.