Pyrazole Herbicide Derivatives for Selective Weed Control
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Solution Overview
Problem
Current herbicides lack effective solutions for controlling broadleaved weeds and weed grasses in crops, with existing compounds often showing limited selectivity and efficacy.
Innovation Solution
Development of novel (1,4,5-trisubstituted 1H-pyrazol-3-yl)oxy-2-alkylthioalkyl acids and their derivatives, which exhibit strong herbicidal activity and good selectivity against harmful plants while being compatible with crop plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing herbicides are used, then some weed control is achieved, but selectivity and efficacy against broadleaved weeds and weed grasses in crops is limited
Solution Approach 1:
The patent modifies the chemical structure of pyrazole derivatives by introducing specific substituents at positions 1, 4, and 5 of the pyrazole ring, and by varying the R1, R2, R3, and Q groups to optimize herbicidal activity and selectivity. This structural parameter optimization enables the compounds to achieve both high efficacy against broadleaved weeds and weed grasses and good selectivity in crop plants
Solution Approach 2:
The invention creates a series of composite pyrazole derivatives with different substituent combinations (including aryl, heteroaryl, alkyl, halogen, cyano, and nitro groups) to achieve diverse herbicidal profiles. The compounds of formula (I) represent a composite chemical family that combines multiple functional groups to simultaneously achieve broad-spectrum weed control and crop safety
2Reliability
If broad-spectrum herbicidal activity is achieved, then efficacy against various weeds improves, but compatibility with crop plants may deteriorate
Solution Approach 1:
The patent introduces different substituent patterns at specific positions of the pyrazole ring (positions 1, 4, and 5) to create localized functional regions with distinct properties. The R1, R2, R3, and Q groups are carefully selected to provide local chemical characteristics that enhance weed kill activity while maintaining crop safety through differential uptake or metabolism
Data Source
AI summary
The present invention relates to novel, herbicidally active (1,4,5-trisubstituted 1H-pyrazol-3-yl)oxy-2-alkoxyalkyl acids and their derivatives of the general formula (I) and their agrochemically compatible/acceptable salts, N-oxides, hydrates, and hydrates of the salts and N-oxides, to processes for preparation thereof and to the use thereof for control of broadleaved weeds and weed grasses in crops of useful plants, and for general control of broadleaved weeds and weed grasses in areas of the environment where plant growth is troublesome.The derivatives of the (1,4,5-trisubstituted 1H-pyrazol-3-yl)oxy-2-alkoxyalkyl acids include in particular their esters and/or amides.