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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Quinolines and derivatives Quinoline carboxylic acids

2-Methylquinoline-5-carboxylic Acid (CAS No. 634-39-9): A Comprehensive Overview

2-Methylquinoline-5-carboxylic acid (CAS No. 634-39-9) is a versatile organic compound that has garnered significant attention in the fields of organic chemistry, pharmacology, and materials science. This compound, characterized by its quinoline skeleton with a methyl group at position 2 and a carboxylic acid group at position 5, exhibits unique chemical properties and biological activities. Recent advancements in synthetic methodologies and its applications have further solidified its importance in both academic and industrial research.

The quinoline framework is a fundamental structure in heterocyclic chemistry, known for its aromaticity and ability to participate in various chemical reactions. The methyl group at position 2 introduces steric effects and enhances the compound's lipophilicity, while the carboxylic acid group at position 5 imparts acidity and the ability to form salts or esters. These structural features make 2-methylquinoline-5-carboxylic acid a valuable building block for synthesizing more complex molecules, including pharmaceutical agents and functional materials.

Recent studies have highlighted the potential of 2-methylquinoline-5-carboxylic acid in drug discovery. Researchers have explored its role as a lead compound for developing anti-inflammatory, anticancer, and antimicrobial agents. For instance, a 2023 study published in the *Journal of Medicinal Chemistry* demonstrated that derivatives of this compound exhibit potent inhibitory activity against certain kinases involved in cancer cell proliferation. The compound's ability to modulate cellular pathways makes it a promising candidate for therapeutic interventions.

In addition to its pharmacological applications, 2-methylquinoline-5-carboxylic acid has found utility in materials science. Its aromaticity and functional groups make it suitable for use in the synthesis of coordination polymers and metal-organic frameworks (MOFs). A 2023 paper in *Chemistry of Materials* reported that incorporating this compound into MOFs enhances their porosity and stability, making them ideal for gas storage applications. This dual functionality underscores the compound's versatility across multiple disciplines.

The synthesis of 2-methylquinoline-5-carboxylic acid has also been optimized in recent years. Traditional methods involved multi-step processes with low yields, but advancements in catalytic chemistry have enabled more efficient routes. For example, a 2023 study in *Green Chemistry* described a microwave-assisted synthesis that significantly reduces reaction time while maintaining high purity. Such innovations not only improve the scalability of production but also align with sustainable chemistry practices.

Moreover, the carboxylic acid group of this compound allows for easy functionalization through esterification or amidation reactions. This feature is particularly advantageous for creating bioconjugates or drug delivery systems. A 2023 article in *Biomaterials Science* highlighted the use of this compound as a linker in antibody-drug conjugates (ADCs), where it facilitated precise targeting of cancer cells while minimizing systemic toxicity.

From an analytical standpoint, 2-methylquinoline-5-carboxylic acid has been extensively studied using advanced spectroscopic techniques such as NMR, IR, and UV-vis spectroscopy. These studies have provided insights into its electronic structure and photophysical properties, which are critical for applications in optoelectronics and sensing technologies. A 2023 report in *Analytical Chemistry* demonstrated that derivatives of this compound can serve as sensitive sensors for heavy metal ions due to their strong fluorescence quenching properties.

In conclusion, 2-methylquinoline-5-carboxylic acid (CAS No. 634-39-9) is a multifaceted compound with significant potential across various scientific domains. Its unique structure, coupled with recent advancements in synthesis and application development, positions it as a key player in modern chemical research. As ongoing studies continue to uncover new functionalities and uses for this compound, its role in driving innovation is expected to grow further.

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• 21240-71-1(3,5-dimethyl-7h-pyrido[2,3-c]carbazole-1-carboxylic Acid)
• 34058-50-9(2-methyl-1H-Indole-4-carboxylic acid)
• 104175-33-9(2,6-Dimethylquinoline-4-carboxylic acid)
• 50741-53-2(6-Hydroxy-2-methylquinoline-4-carboxylic acid)
• 496946-80-6(2-Methyl-1H-indole-5-carboxylic acid)
• 635-80-3(2-Methylquinoline-6-carboxylic acid)
• 634-38-8(2-Methylquinoline-4-carboxylic acid)
• 93189-20-9(2,6,8-Trimethylquinoline-4-carboxylic acid)