• 1. Assembly of three-dimensional networks based upon silver–ethynide complexes bearing pyridyl and carboxylate groups
  Zifei Zhang,Bao Li,Xianggao Meng,Xiangbing Yin,Tianle Zhang Dalton Trans. 2013 42 4306

• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Pyridines and derivatives Pyridinecarboxylic acids
• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Pyridines and derivatives Pyridinecarboxylic acids and derivatives Pyridinecarboxylic acids

5-Ethynylpyridine-2-carboxylic acid: A Comprehensive Overview

5-Ethynylpyridine-2-carboxylic acid, also known by its CAS registry number 17880-57-8, is a unique compound that has garnered significant attention in the field of organic chemistry and pharmaceutical research. This article delves into the structural properties, synthesis methods, biological activities, and potential applications of this intriguing molecule.

Structure and Properties

5-Ethynylpyridine-2-carboxylic acid features a pyridine ring with an ethynyl group at the 5-position and a carboxylic acid group at the 2-position. The molecule's structure allows for versatile chemical reactivity, making it a valuable building block in organic synthesis. Its properties include:

• A rigid aromatic framework due to the pyridine ring.
• An ethynyl group that enables strong electron delocalization and potential for metal-catalyzed reactions.
• A carboxylic acid group that can participate in hydrogen bonding and act as a versatile functional moiety for further chemical modifications.

Synthesis and Preparation

The synthesis of 5-Ethynylpyridine-2-carboxylic acid can be achieved through various routes, with the most efficient methods involving:

1. Nucleophilic substitution reactions starting from a suitable precursor.
2. Cyclization reactions that utilize the ethynyl group to form the pyridine ring.
3. Multi-step procedures that ensure high yields and purity, which are critical for its application in pharmaceutical research.

Biological Activities

Research has demonstrated that 5-Ethynylpyridine-2-carboxylic acid exhibits a range of biological activities, including:

• Antimicrobial activity: Studies have shown its ability to inhibit bacterial growth, making it a potential candidate for antimicrobial drug development.
• Cytotoxic effects: The compound has demonstrated cytotoxicity against certain cancer cell lines, highlighting its potential as an anticancer agent.
• Enzyme inhibition: It exhibits inhibitory effects on specific enzymes, which could be leveraged in the development of enzyme-targeted therapies.

Applications in Drug Discovery

The unique combination of structural features and biological activities positions 5-Ethynylpyridine-2-carboxylic acid as a valuable tool in drug discovery. Its applications include:

• Serving as a lead compound for the development of new drugs.
• Being used as a building block to create more complex molecules with enhanced therapeutic properties.
• Potentially being incorporated into combinatorial chemistry libraries for high-throughput screening.

Toxicological and Safety Considerations

While 5-Ethynylpyridine-2-carboxylic acid has shown promising biological activities, its safety profile must be thoroughly evaluated. This includes:

• Toxicity studies: Assessing the acute and chronic toxic effects on various biological systems.
• Carcinogenic potential: Investigating whether the compound has any mutagenic or carcinogenic properties.
• Disposition in the body: Understanding its absorption, distribution, metabolism, and excretion (ADME) characteristics to ensure it does not pose long-term health risks.

Future Directions and Research Opportunities

The study of 5-Ethynylpyridine-2-carboxylic acid offers several avenues for future research:

• Exploring its potential as a template for the development of novel drugs targeting specific diseases.
• Investigating its role in medicinal chemistry, particularly in the design of bioisosteres and analogs with improved pharmacokinetic properties.
• Examining its interactions with biological systems at the molecular level to gain deeper insights into its mode of action.

Conclusion

5-Ethynylpyridine-2-carboxylic acid, CAS No 17880-57-8, is a multifaceted compound with significant potential in the field of organic chemistry and pharmaceutical research. Its unique structural features, versatile biological activities, and promising applications make it a valuable subject for further investigation. As scientific advancements continue to unlock new possibilities, this compound is poised to play an increasingly important role in drug discovery and development.

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• 53574-58-6(5-formylpyridine-2-carboxylic acid)
• 83282-49-9(5,6-dimethylpyridine-2-carboxylic acid)
• 39977-41-8(5-(Hydroxymethyl)picolinic acid)
• 177359-60-3(5-methylpyridine-2-carboxylic acid hydrochloride)
• 83282-46-6(3,6-dimethylpyridine-2-carboxylic acid)
• 219623-05-9(3-Ethynylpicolinic acid)
• 69151-83-3(1H-Pyrrole-2-carboxylic acid, 4-ethynyl- (9CI))
• 802256-42-4(4,5-DIMETHYLPYRIDINE-2-CARBOXYLIC ACID)