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  Hanie Hashtroudi,Ian D. R. Mackinnon J. Mater. Chem. C, 2020,8, 13108-13126
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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Indoles and derivatives Indolecarboxylic acids and derivatives

7-Bromo-5-chloro-1H-indole-2-carboxylic acid (CAS No. 952959-39-6): A Versatile Intermediate in Modern Pharmaceutical Research

The compound 7-Bromo-5-chloro-1H-indole-2-carboxylic acid (CAS No. 952959-39-6) represents a significant intermediate in the realm of pharmaceutical chemistry, offering a unique structural framework that has garnered considerable attention in recent years. Its molecular structure, characterized by the presence of both bromo and chloro substituents on an indole core, makes it a valuable scaffold for the synthesis of various biologically active molecules. This introduction delves into the compound's properties, synthetic pathways, and its emerging applications in medicinal chemistry, particularly in the development of novel therapeutic agents.

The indole moiety is a well-documented pharmacophore in drug discovery, with numerous indole derivatives exhibiting a wide range of biological activities. The introduction of halogen atoms, such as bromine and chlorine, into the indole ring system enhances its reactivity and diversity, making it an attractive candidate for further functionalization. The specific positioning of these halogens at the 7- and 5-positions (respectively) in 7-Bromo-5-chloro-1H-indole-2-carboxylic acid provides a rich platform for chemical manipulation, enabling the construction of complex molecules through various coupling and substitution reactions.

In recent years, there has been a surge in research focused on indole derivatives as potential therapeutic agents. These compounds have shown promise in treating various diseases, including cancer, inflammation, and neurological disorders. The structural features of 7-Bromo-5-chloro-1H-indole-2-carboxylic acid make it particularly interesting for designing molecules that can interact with biological targets such as kinases, transcription factors, and receptors. For instance, studies have demonstrated that indole derivatives can inhibit the activity of certain kinases involved in cancer progression by binding to their active sites.

The synthesis of 7-Bromo-5-chloro-1H-indole-2-carboxylic acid typically involves multi-step organic transformations starting from commercially available precursors. One common synthetic route involves the bromination and chlorination of an appropriately substituted indole derivative followed by carboxylation at the 2-position. Advances in synthetic methodologies have enabled more efficient and scalable production processes for this compound, making it more accessible for research applications.

The versatility of 7-Bromo-5-chloro-1H-indole-2-carboxylic acid extends beyond its use as a building block for drug discovery. It has also found utility in materials science and catalysis. For example, its ability to participate in cross-coupling reactions makes it a valuable reagent in the synthesis of organic electronic materials. Additionally, researchers have explored its role as a ligand in transition metal catalysis, where it can facilitate various transformations under mild conditions.

Recent studies have highlighted the potential of 7-Bromo-5-chloro-1H-indole-2-carboxylic acid in developing novel antimicrobial agents. The indole core is known to exhibit antibacterial and antifungal properties, and the introduction of halogen atoms can further enhance these effects by improving bioavailability and target specificity. Preliminary investigations have shown that certain derivatives of this compound exhibit promising activity against multidrug-resistant pathogens, suggesting their potential as future therapeutic options.

The growing interest in halogenated indoles has also spurred innovation in synthetic chemistry. Researchers are continually exploring new methods to introduce halogens into indole frameworks with high selectivity and yield. Techniques such as transition metal-catalyzed halogenation and electrochemical methods are being developed to achieve this goal. These advancements not only improve the accessibility of compounds like 7-Bromo-5-chloro-1H-indole-2-carboxylic acid but also open up new avenues for structural diversification.

In conclusion, 7-Bromo-5-chloro-1H-indole-2-carboxylic acid (CAS No. 952959-39-6) is a multifaceted compound with significant implications in pharmaceutical research and beyond. Its unique structural features make it an excellent scaffold for designing biologically active molecules, particularly those targeting cancer and inflammatory diseases. As synthetic methodologies continue to evolve, the accessibility and utility of this compound are expected to expand further, driving innovation across multiple scientific disciplines.

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