Chemical Structure and Key Properties

2-(4-Methyl-1H-pyrazol-1-yl)propanoic acid features a five-membered pyrazole ring—a nitrogen-rich heteroaromatic scaffold—N-linked at the 1-position to a propanoic acid moiety. A methyl group at the 4-position of the pyrazole ring modulates the electron density of the aromatic system and influences the compound's steric and physicochemical profile.

The presence of both a heterocyclic nitrogen-donor system and a free carboxylic acid confers bifunctional reactivity: the carboxylate can participate in amide coupling, esterification, and coordination chemistry, while the pyrazole ring can engage in hydrogen bonding and π-stacking interactions relevant to target binding in biological contexts.

The chiral center at the α-carbon of the propanoic acid unit may be of significance in asymmetric synthesis applications, and researchers should confirm enantiomeric composition requirements before use.

Applications in Medicinal Chemistry and Drug Discovery

Pyrazole carboxylic acids occupy a prominent position in pharmaceutical research owing to the prevalence of the pyrazole motif in approved drugs and clinical candidates. 2-(4-Methyl-1H-pyrazol-1-yl)propanoic acid can serve as an N-alkylated pyrazole fragment for fragment-based drug discovery (FBDD), providing a compact, drug-like scaffold with favourable calculated physicochemical parameters.

The carboxylic acid handle enables straightforward conjugation to amine-bearing pharmacophores via standard peptide-coupling reagents (e.g., HATU, EDC/HOBt), facilitating rapid generation of amide libraries. This makes the compound particularly useful for parallel synthesis campaigns targeting kinase inhibitors, GPCR modulators, and antimicrobial agents where pyrazole-containing motifs are frequently explored.

Researchers in agrochemical discovery may also find this building block relevant, as pyrazole derivatives constitute a significant class of herbicide and fungicide candidates.

Handling, Storage, and Safety Considerations

As with most heterocyclic carboxylic acid reagents, 2-(4-Methyl-1H-pyrazol-1-yl)propanoic acid should be handled under standard laboratory conditions with appropriate personal protective equipment including gloves, safety glasses, and a lab coat. Work in a well-ventilated area or fume hood is recommended when handling bulk quantities or preparing solutions.

The compound should be stored in a tightly sealed container in a cool, dry environment, protected from light and moisture to prevent degradation or hygroscopic uptake. Refer to the Safety Data Sheet (SDS) provided by Aladdin Scientific for complete hazard classification, first-aid measures, and disposal guidance before use.

Researchers should conduct their own risk assessment in accordance with local institutional safety regulations prior to working with this material.

Purity, Specification, and Quality Assurance

Aladdin Scientific supplies 2-(4-Methyl-1H-pyrazol-1-yl)propanoic acid (SKU: P728896) as a research-grade reagent. Purity is typically confirmed by high-performance liquid chromatography (HPLC) and/or nuclear magnetic resonance (NMR) spectroscopy. Researchers requiring a specific purity threshold—for instance, ≥97% or ≥98% for sensitive biological assays—should consult the current Certificate of Analysis (CoA) available from Aladdin Scientific prior to placing an order.

Lot-specific analytical data including melting point, NMR spectra, and mass spectrometry confirmation are available upon request. Procurement teams should note that specifications may vary between lots; referencing the CoA for the specific lot number is strongly recommended for reproducibility-critical applications.