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• 2. Excimer emission and magnetoluminescence of radical-based zinc(ii) complexes doped in host crystals?
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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Toluenes

Comprehensive Overview of 5-Methyl-3-(m-tolyl)isoxazole-4-carboxylic acid (CAS No. 876717-65-6): Properties, Applications, and Industry Insights

5-Methyl-3-(m-tolyl)isoxazole-4-carboxylic acid (CAS 876717-65-6) is a specialized isoxazole derivative with growing relevance in pharmaceutical and agrochemical research. This white to off-white crystalline compound, characterized by its carboxylic acid functional group and methyl-substituted aromatic ring, serves as a critical building block in modern drug discovery. The molecular structure combines a 5-methylisoxazole core with a meta-tolyl group, creating unique electronic properties that influence its reactivity and binding characteristics.

Recent studies highlight the compound's role as a precursor for heterocyclic drug candidates, particularly in developing anti-inflammatory agents and enzyme inhibitors. Its isoxazole-carboxylic acid moiety enables diverse chemical modifications, making it valuable for structure-activity relationship (SAR) studies. Researchers frequently inquire about "synthetic routes for 876717-65-6" and "5-Methyl-3-(m-tolyl)isoxazole-4-carboxylic acid solubility," reflecting practical concerns in laboratory applications. The compound typically demonstrates moderate solubility in polar organic solvents like DMSO or methanol but limited water solubility at neutral pH.

The pharmaceutical industry shows increasing interest in this scaffold due to its potential in targeted protein degradation (PROTACs) and covalent inhibitor design. Analytical data reveals a melting point range of 180-185°C and characteristic FTIR absorptions at 1700 cm^-1 (C=O stretch) and 1550 cm^-1 (isoxazole ring). Chromatographic purity (>98% by HPLC) is crucial for research applications, as emphasized by frequent searches for "HPLC methods for CAS 876717-65-6." Stability studies indicate the compound remains intact under nitrogen atmosphere at room temperature for extended periods.

Environmental and regulatory aspects of isoxazole derivatives have gained attention, with researchers examining "biodegradation of 5-methylisoxazole compounds." While not classified as hazardous, proper laboratory handling procedures should be followed. The compound's low acute toxicity profile (based on structural analogs) makes it suitable for various research settings. Current patent literature suggests applications in crop protection formulations, particularly as a synthetic intermediate for fungicide development.

From a commercial perspective, 876717-65-6 is available in gram to kilogram quantities with pricing influenced by purity specifications. The growing demand connects to trends in fragment-based drug discovery (FBDD), where such small heterocycles serve as starting points for lead optimization. Supply chain considerations include the need for controlled storage conditions (2-8°C in airtight containers) to maintain stability, a frequent concern reflected in search queries about "long-term storage of isoxazole carboxylic acids."

Advanced applications explore the compound's utility in metal-organic frameworks (MOFs) and catalysis, leveraging its bifunctional nature. Recent publications describe its use in constructing multicomponent reaction systems, addressing the pharmaceutical industry's need for efficient synthetic methodologies. Analytical challenges, such as distinguishing between regioisomeric isoxazole derivatives, remain an active research area, with mass spectrometry and ¹³C NMR being particularly diagnostic techniques.

The future outlook for 5-Methyl-3-(m-tolyl)isoxazole-4-carboxylic acid appears promising, with computational chemistry predicting favorable drug-like properties for derivatives. Its balanced lipophilicity profile (calculated logP ~2.1) and hydrogen bonding capacity make it attractive for medicinal chemistry programs. As green chemistry principles gain traction, researchers investigate "solvent-free synthesis of isoxazole-4-carboxylic acids," potentially reducing environmental impact while maintaining yield efficiency.

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