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Comprehensive Overview of 4-Chloro-5-Ethyl-2,6-Dimethylpyrimidine (CAS No. 1178504-57-8): Properties, Applications, and Industry Insights

4-Chloro-5-ethyl-2,6-dimethylpyrimidine (CAS No. 1178504-57-8) is a specialized heterocyclic compound gaining traction in pharmaceutical and agrochemical research due to its unique structural features. As a chlorinated pyrimidine derivative, it serves as a versatile building block for synthesizing bioactive molecules. The compound's molecular formula C₈H₁₁ClN₂ and precise substitution pattern at positions 4, 5, 2, and 6 make it particularly valuable for medicinal chemistry applications.

Recent studies highlight the growing demand for pyrimidine-based intermediates in drug discovery, especially for kinase inhibitors and antiviral agents. The ethyl and chloro functional groups in this compound enable selective modifications, addressing current challenges in structure-activity relationship (SAR) optimization. Industry reports indicate increased patent filings incorporating similar structures for crop protection chemicals, aligning with the global push for sustainable agriculture solutions.

From a synthetic chemistry perspective, 1178504-57-8 demonstrates excellent stability under standard storage conditions (typically 2-8°C in inert atmosphere). Its crystalline form and moderate solubility in organic solvents like dichloromethane and THF facilitate various cross-coupling reactions. Analytical characterization typically involves HPLC purity analysis (>98%) and confirmation via 1H/13C NMR spectroscopy, with the chloro substituent producing distinctive signals in the aromatic region.

The compound's relevance extends to high-throughput screening libraries, where researchers value its hydrogen-bond acceptor/donor capacity for target interaction studies. Computational chemistry models suggest potential applications in fragment-based drug design, particularly for ATP-binding sites. These attributes explain its inclusion in major chemical catalogues from suppliers like Sigma-Aldrich and TCI America.

Environmental and safety assessments of 4-chloro-5-ethyl-2,6-dimethylpyrimidine follow standard REACH compliance protocols. Proper handling requires PPE including nitrile gloves and fume hood usage, though it doesn't appear on any restricted substances lists. The compound's low ecotoxicity profile makes it preferable to heavier halogenated alternatives in green chemistry initiatives.

Market analysts note rising interest in custom pyrimidine synthesis services incorporating this scaffold, particularly for orphan drug development. The chloro group's reactivity allows efficient conversion to hydroxyl or amino derivatives, supporting diversity-oriented synthesis. Recent publications in ACS Medicinal Chemistry Letters highlight its utility in creating allosteric modulators for neurological targets.

Quality control specifications for CAS 1178504-57-8 typically require residual solvent analysis by GC-MS and heavy metal screening below 10 ppm. Advanced purification techniques like preparative HPLC or recrystallization from ethanol/water mixtures yield material suitable for GMP applications. Storage stability studies indicate >24-month shelf life when protected from light and moisture.

Emerging applications include its use as a ligand precursor in catalytic systems and as a fluorescent probe scaffold. The compound's UV absorption maxima around 265 nm makes it detectable in LC-MS methods with excellent sensitivity. These characteristics support its adoption in high-content screening platforms and chemical biology research programs worldwide.

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