Related Experiment Video
Updated: Jul 19, 2026

Efficient Construction of Drug-like Bispirocyclic Scaffolds Via Organocatalytic Cycloadditions of α-Imino γ-Lactones and Alkylidene Pyrazolones
Published on: February 7, 2019
Diaryl substituted pyrazoles as potent CCR2 receptor antagonists
Anthony B Pinkerton1, Dehua Huang, Rowena V Cube
1Department of Medicinal Chemistry, Merck Research Laboratories, MRLSDB2, 3535 General Atomics Court, San Diego, CA 92121, USA. apinkerton@kalypsys.com
Researchers synthesized novel diaryl pyrazoles that act as potent antagonists for chemokine receptor subtype 2. Structure-activity studies identified compound 23 as a highly effective antagonist with an IC50 of 6 nM.
Area of Science:
- Medicinal Chemistry
- Pharmacology
- Organic Synthesis
Background:
- Chemokine receptors, particularly subtype 2 (CCR2), play crucial roles in inflammatory and immune responses.
- Targeting chemokine receptors is a promising strategy for developing therapeutics for various diseases.
Purpose of the Study:
- To identify and synthesize novel diaryl substituted pyrazoles as potential antagonists of chemokine receptor subtype 2.
- To conduct structure-activity relationship (SAR) studies to optimize antagonist potency.
Main Methods:
- Synthesis of a series of diaryl substituted pyrazole compounds.
- Evaluation of antagonist activity against chemokine receptor subtype 2.
- Structure-activity relationship analysis to guide compound optimization.
Main Results:
- Successful identification and synthesis of diaryl substituted pyrazoles.
- Demonstrated potent antagonist activity for the synthesized compounds against chemokine receptor subtype 2.
- Discovery of compound 23 with a low IC50 value of 6 nM, indicating high potency.
Conclusions:
- Diaryl substituted pyrazoles represent a promising class of compounds for targeting chemokine receptor subtype 2.
- Compound 23 is a highly potent antagonist, warranting further investigation for therapeutic potential.
Related Concept Videos
Antipsychotic Drugs: Typical and Atypical Agents
Adrenergic Antagonists: Chemistry and Classification of ɑ-Receptor Blockers
Nonselective α-blockers: Nonselective α-blockers contain haloalkylamine or imidazoline moieties. Phenoxybenzamine, with a haloalkylamine...
Adrenergic Agonists: Chemistry and Structure-Activity Relationship
Aromatic ring substitutions: Substituting the aromatic ring with –OH groups at positions 3 and 4 yields catecholamines (e.g., epinephrine), which have a high affinity for adrenoceptors. Hydrogen bonding between –OH groups and receptors enhances adrenergic activity.
Separation of the aromatic...
ortho–para-Directing Activators: –CH3, –OH, –⁠NH2, –OCH3
meta-Directing Deactivators: –NO2, –CN, –CHO, –⁠CO2R, –COR, –CO2H
Chemotherapy-Induced Nausea and Vomiting: Dopamine Receptor Antagonists
Phenothiazines, such as prochlorperazine...

