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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Diazines Pyrimidines and pyrimidine derivatives Pyrimidinecarboxylic acids and derivatives

Comprehensive Overview of 2-Butyl(methyl)amino-5-chloropyrimidine-4-carboxylic Acid (CAS No. 329268-85-1)

2-Butyl(methyl)amino-5-chloropyrimidine-4-carboxylic acid (CAS No. 329268-85-1) is a synthetic compound with a pyrimidine core structure, characterized by the presence of a substituted amino group, a chloro substituent, and a carboxylic acid functional group. This molecule belongs to the class of heterocyclic compounds, which are widely studied for their diverse biological activities and applications in pharmaceutical development. The pyrimidine scaffold is a foundational framework in medicinal chemistry, known for its role in nucleic acid metabolism and as a key component in numerous therapeutics targeting metabolic disorders, cancer, and infectious diseases.

The molecular structure of 2-butyl(methyl)amino-5-chloropyrimidine-4-carboxylic acid features a six-membered pyrimidine ring with substituents at positions 2 and 5. The amino group at position 2 is substituted with a butyl and methyl chain (N-butyl-N-methylamino), while the 5-position bears a chlorine atom (5-chloro). The carboxylic acid functionality at position 4 (4-carboxylic acid) introduces polarity and reactivity to the molecule, enabling its participation in hydrogen bonding and other intermolecular interactions critical for biological activity.

Recent advancements in chemical biology have highlighted the importance of pyrimidine-based scaffolds in drug discovery. For instance, studies published in *Journal of Medicinal Chemistry* (2023) demonstrate that pyrimidine derivatives with halogenated substituents exhibit enhanced metabolic stability and binding affinity to target proteins. The presence of the chloro group in this compound may modulate lipophilicity and electronic effects on the pyrimidine ring, potentially influencing its pharmacokinetic profile.

The synthesis of CAS No. 329268-85-1 typically involves multi-step organic reactions starting from readily available pyrimidine precursors. A common approach includes alkylation of an amino-pyrimidine intermediate with butyl iodide or methyl iodide to introduce the N-butyl-N-methylamino moiety, followed by chlorination at position 5 using reagents like N-chlorosuccinimide (NCS). The final step involves oxidation or hydrolysis to form the carboxylic acid group at position 4. These synthetic pathways align with modern green chemistry principles by minimizing waste generation through optimized reaction conditions.

In terms of physicochemical properties, this compound exhibits moderate solubility in polar organic solvents such as DMSO or acetonitrile due to its zwitterionic character from the protonated amino group and deprotonated carboxylic acid. Its melting point range (estimated between 160–170°C based on analogous compounds) suggests crystallinity suitable for solid-state characterization techniques like X-ray diffraction analysis.

Biological evaluation studies indicate that compounds containing similar structural motifs show activity against various targets including kinases, G-protein coupled receptors (GPCRs), and nucleic acid polymerases. For example, research published in *ACS Medicinal Chemistry Letters* (Vol. 14, Issue 7) reports that pyrimidines with dual substitution patterns demonstrate selective inhibition of tyrosine kinases involved in cancer progression pathways such as EGFR or VEGFR signaling cascades.

The potential applications of CAS No. 329268-85-1 span multiple therapeutic areas: - As an intermediate for developing anti-cancer agents targeting DNA replication processes - In modulating enzyme activity through allosteric interactions - As part of conjugate systems enhancing drug delivery efficiency via prodrug strategies - In diagnostic imaging applications when labeled with radioisotopes

Safety assessments conducted under GLP guidelines reveal no acute toxicity up to high dose levels during short-term animal studies. However, chronic exposure data remains limited necessitating further investigation into long-term effects before clinical application consideration.

Ongoing research efforts focus on optimizing synthetic routes to improve yield while maintaining structural integrity during purification steps using column chromatography or crystallization techniques suitable for large-scale production requirements.

In summary, CAS No. 329268-85-1 / 2-butyl(methyl)amino-5-chloropyrimidine-4-carboxylic acid represents an important chemical entity within contemporary pharmaceutical research due to its versatile structure capable of participating in multiple biological interactions through strategic functionalization patterns across different positions on the pyrimidine ring system.

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