Cis-Substituted Four-Membered Ring Carboxamides for Nematicidal Control
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Solution Overview
Problem
Current nematicides lack effectiveness in controlling plant parasitic nematodes, particularly resistant species, and often have adverse effects on non-target species and the environment.
Innovation Solution
Development of novel four-membered ring carboxamide compounds with a cis-substituted structure, specifically designed to exhibit nematicidal activity, which are synthesized through specific acylation reactions and purification methods to achieve high enantiomeric purity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional nematicides are used, then nematode control is achieved, but effectiveness against resistant species is insufficient and adverse effects on non-target species occur
Solution Approach 1:
The patent modifies the chemical structure of nematicides by changing molecular parameters - specifically using cis-substituted four-membered ring carboxamides with particular heteroaromatic substituents (pyridyl, pyrimidyl, pyrazinyl, pyrazolyl, thienyl, furyl) and controlling stereochemistry, thereby improving effectiveness against resistant nematode species while reducing harm to non-target organisms
Solution Approach 2:
The invention creates composite molecular structures combining four-membered ring carboxamide cores with various heteroaromatic substituents, achieving a synergistic effect that enhances nematicidal activity against resistant species while maintaining selectivity for target organisms
2Productivity
If existing nematicides are applied, then plant parasitic nematodes are controlled, but resistant species remain unaffected
Solution Approach 1:
The patent changes the chemical parameters of the nematicide molecules by introducing specific heteroaromatic rings (pyridyl, pyrimidyl, pyrazinyl, pyrazolyl, thienyl, furyl) at defined positions on the four-membered ring, creating molecules with altered binding characteristics that effectively target resistant nematode species
3Manufacturing precision
If novel cis-substituted four-membered ring carboxamides are synthesized, then high enantiomeric purity is achieved, but synthesis complexity increases
Solution Approach 1:
The patent employs preliminary action by using chiral pool starting materials or chiral catalysts in the synthesis of four-membered ring carboxamides, establishing the correct stereochemistry early in the synthesis process to achieve high enantiomeric purity in the final product
Solution Approach 2:
The invention replaces complex multi-step synthetic sequences with more efficient one-pot or few-step reactions that directly form the cis-substituted four-membered ring structure with the desired stereochemistry, reducing overall synthesis complexity while maintaining high enantiomeric purity
Data Source
AI summary
Compounds of the formula in which the substituents are as defined in claim 1, are suitable for use as nematicides.