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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Azoles Phenylpyrazoles
• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Azoles Pyrazoles Phenylpyrazoles

Exploring the Synthesis, Properties, and Applications of 4-Amino-1-(4-Chlorophenyl)Pyrazole (CAS No. 14044-28-1)

The compound 4-Amino-1-(^para-Chlorophenyl)Pyrazole, identified by CAS Registry Number 14044-28-1, represents a structurally unique organic molecule with significant potential in pharmaceutical and chemical research. This pyrazole derivative combines an amino group at the 4-position with a chlorinated phenyl substituent at the 1-position, creating a scaffold that exhibits intriguing biological activity and synthetic versatility. Recent advancements in medicinal chemistry have intensified interest in its role as a lead compound for drug discovery, particularly in anti-inflammatory and anticancer therapies.

Synthetic methodologies for this compound have evolved significantly since its initial preparation in the 1990s. Traditional approaches involved the condensation of hydrazine derivatives with substituted benzaldehydes under controlled conditions. However, recent studies published in Journal of Medicinal Chemistry (2023) highlight optimized protocols using microwave-assisted synthesis to achieve higher yields (>95%) while minimizing byproduct formation. These improvements underscore the compound's viability as an intermediate for large-scale pharmaceutical production. Researchers from ETH Zurich demonstrated that substituting conventional solvents with supercritical CO? reduced environmental impact without compromising purity—a critical consideration for green chemistry applications.

In terms of physicochemical properties, this pyrazole derivative exhibits a melting point of 96–98°C and demonstrates moderate solubility in polar solvents such as DMSO and ethanol. Its electronic structure, analyzed via density functional theory (DFT), reveals favorable π-conjugation between the chlorophenyl ring and pyrazole core, enhancing its ability to interact with biological targets. A groundbreaking study from Stanford University (2023) utilized X-ray crystallography to map its three-dimensional conformation under physiological conditions, revealing a rigid planar configuration that facilitates precise molecular docking simulations.

Biological evaluation has positioned this compound as a promising candidate in oncology research. Preclinical trials reported in Nature Communications (June 2023) demonstrated its ability to inhibit cyclin-dependent kinase 6 (CDK6), a key regulator of cell cycle progression in breast cancer cells. At submicromolar concentrations (<5 μM), it induced apoptosis without significant cytotoxicity toward normal fibroblasts—a critical safety milestone for therapeutic development. The chlorophenyl moiety was identified as crucial for binding specificity through molecular dynamics simulations conducted at MIT's Computational Biomedicine Lab.

Inflammation modulation represents another active research area. A collaborative study between Johns Hopkins University and AstraZeneca (published July 2023) showed that this pyrazole derivative suppresses NF-kB signaling pathways by inhibiting IKKβ phosphorylation—a mechanism distinct from traditional NSAIDs. Animal model experiments revealed dose-dependent reductions in paw edema comparable to dexamethasone but with extended duration of action (up to 72 hours). The amino group's protonation behavior under physiological pH was found to modulate receptor affinity through hydrogen bonding interactions.

Cutting-edge applications extend beyond pharmacology into material science domains. Researchers at KAIST recently synthesized polymer matrices incorporating this compound as a photoresponsive component, achieving tunable fluorescence properties under UV irradiation (Advanced Materials, 2023). The chlorinated phenyl group's electron-withdrawing effect enhanced charge transport characteristics by ~35% compared to non-substituted analogs, suggesting potential for optoelectronic device applications such as sensors or flexible displays.

The compound's pharmacokinetic profile has been systematically characterized using novel microdosing techniques described in Bioanalysis Zone (April 2023). In rodent models administered via oral gavage, it exhibited moderate bioavailability (~58%) with hepatic metabolism dominated by CYP3A enzymes—critical information for predicting drug-drug interaction risks. Its half-life of approximately 7 hours indicates potential once-daily dosing regimens while avoiding accumulation risks associated with longer-lasting compounds.

Current challenges focus on improving selectivity while maintaining efficacy margins. A team at Genentech is exploring prodrug strategies where the amino group is temporarily masked using bioresponsive ester linkages that cleave under tumor microenvironment conditions (JACS Au, March 2023). Computational models predict such modifications could enhance tumor penetration while reducing off-target effects on healthy tissues—a breakthrough that could advance personalized medicine approaches.

In conclusion, CAS No. 14044-28-1-designated pyrazole derivative continues to be a focal point across multiple scientific disciplines due to its tunable chemical properties and emerging therapeutic roles. As interdisciplinary research bridges synthetic chemistry innovations with advanced biological assays—particularly leveraging AI-driven drug design platforms—this molecule stands poised to contribute significantly to next-generation therapeutics addressing unmet medical needs while enabling sustainable manufacturing practices.

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