Phenylpyrazole Insecticide Composition for Resistance and Toxicity Control
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Solution Overview
Problem
The widespread use of phenylpyrazole insecticides like fipronil has led to resistance in pests and environmental contamination, posing risks to non-target organisms and human health, necessitating the development of safer and more effective alternatives.
Innovation Solution
Development of N-phenyl-1H-pyrazolo[3,4-b]pyridine-3-carbonitriles, which act as insecticidal agents by inhibiting the GABA-gated chloride channel, offering broad-spectrum efficacy against insects while minimizing toxicity to mammals and environmental persistence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phenylpyrazole insecticides like fipronil are used widely, then insecticidal efficacy is improved, but resistance in pests develops and environmental contamination increases
Solution Approach 1:
The patent modifies the chemical structure of phenylpyrazole insecticides by changing molecular parameters - specifically introducing a pyridine ring fused to the pyrazole core and adding a carbonitrile group at the 3-position. This structural parameter change creates new compounds (N-phenyl-1H-pyrazolo[3,4-b]pyridine-3-carbonitriles) that maintain insecticidal efficacy while reducing resistance development and environmental persistence, directly addressing the contradiction between efficacy and harmful factors
Solution Approach 2:
The invention creates a composite molecular structure by combining a pyridine ring system with a pyrazole core and carbonitrile group. This composite molecular architecture integrates the beneficial properties of each functional unit - the pyridine provides structural stability and selective binding, the pyrazole maintains GABA receptor targeting, and the carbonitrile group enhances metabolic stability - achieving both efficacy and reduced harm
2Reliability
If phenylpyrazole insecticides are used to control pests, then pest control effectiveness is improved, but toxicity to non-target organisms increases
Solution Approach 1:
The patent applies local quality by creating structural differences that are specific to certain regions of the molecule - the fused pyridine-pyrazole system with the carbonitrile group at a specific position creates a unique molecular fingerprint that binds selectively to insect GABA receptors while avoiding mammalian targets. This localized structural feature provides both effective pest control and reduced non-target toxicity
Solution Approach 2:
Instead of trying to reduce the inherent toxicity of phenylpyrazoles by diluting or deactivating them, the invention inverts the approach by creating an entirely new molecular class with fundamentally different binding characteristics. The N-phenyl-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile structure provides selective binding to insect receptors through its unique fused ring system, achieving effective pest control while naturally avoiding mammalian toxicity targets
3Adaptability or versatility
If fipronil is used as a phenylpyrazole insecticide, then broad-spectrum insecticidal activity is improved, but metabolic toxicity and environmental persistence increase
Solution Approach 1:
The patent changes key molecular parameters of fipronil by replacing its core structure with N-phenyl-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile. This parameter change maintains the broad-spectrum insecticidal activity through GABA receptor binding while improving metabolic stability and reducing environmental persistence, as the new structure degrades more rapidly and with lower toxicity to non-target organisms
Solution Approach 2:
The invention adopts the principle of using short-living compounds that rapidly degrade in the environment. The N-phenyl-1H-pyrazolo[3,4-b]pyridine-3-carbonitrile structure is designed to be metabolically unstable in non-target organisms and environmentally persistent, breaking down quickly into less harmful products. This short-living characteristic reduces cumulative toxicity and environmental contamination compared to fipronil's long persistence
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
These compounds provide effective pest control in crops, livestock, and companion animals without the risks associated with fipronil, maintaining safety for non-target species and reducing metabolic toxicity.
Implementation Method 1
phenylpyrazole insecticides act on the GABA (gamma-aminobutyric acid) receptor on the neurons of insects, blocking chloride ion conduction
Data Source
AI summary
The present disclosure relates to new and improved insecticidal compounds of the phenylpyrazole class, according to the Formula I:wherein X, Y, Z, and Ar are as defined herein. In particular, the disclosure provides new insecticidal compounds for use against a variety of insects (arthropods), such as, for the treatment or prevention of disease or infestation on poultry and other livestock, horses, cats, dogs, and other companion animals, fields, crops, and other insecticidal uses. In particular embodiments, the present disclosure provides the use of said compounds for the treatment, control, suppression, or eradication, of an infection or infestation of an insect (arthropod), such as an adult insect, insect egg, insect larva, insect nymph, and/or insect pupa, including, but not limited to, the poultry mite, Dermanyssus gallinae.