• 1. Embedding cyclic nitrone in mesoporous silica particles for EPR spin trapping of superoxide and other radicals?
  Eric Besson,Stéphane Gastaldi,Emily Bloch,Selma Aslan,Hakim Karoui,Olivier Ouari,Micael Hardy Analyst, 2019,144, 4194-4203
• 2. Distinctive size effects of Pt nanoparticles immobilized on Fe3O4@PPy used as an efficient recyclable catalyst for benzylic alcohol aerobic oxidation and hydrogenation reduction of nitroaromatics
  Yu Long,Bing Yuan,Jianrui Niu,Xin Tong,Jiantai Ma New J. Chem., 2015,39, 1179-1185
• 3. Exceptional activity of sub-nm Pt clusters on CdS for photocatalytic hydrogen production: a combined experimental and first-principles study?
  Qiyuan Wu,Shangmin Xiong,Peichuan Shen,Shen Zhao,Alexander Orlov Catal. Sci. Technol., 2015,5, 2059-2064
• 4. Excimer formation effects and trap-assisted charge recombination loss channels in organic solar cells of perylene diimide dimer acceptors?
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• 5. Dissociative electron attachment to HGaF4 Lewis–Br?nsted superacid
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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Benzenesulfonamides

3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole (CAS No. 887338-48-9): A Versatile Building Block in Organic Synthesis

3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole (CAS No. 887338-48-9) is a highly specialized indole derivative that has gained significant attention in pharmaceutical research and organic synthesis. This compound, characterized by its unique bromo-fluoro substitution pattern and tosyl protecting group, serves as a crucial intermediate in the development of various biologically active molecules.

The molecular structure of 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole features an indole core with strategic substitutions at the 3- and 5-positions, making it particularly valuable for cross-coupling reactions in medicinal chemistry. The presence of both bromine and fluorine atoms offers distinct reactivity profiles, enabling chemists to perform selective transformations under controlled conditions.

Recent trends in pharmaceutical research highlight the growing demand for fluorinated indole derivatives, as evidenced by increased search queries for "fluoro indole synthesis" and "brominated heterocycles in drug discovery". The 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole structure aligns perfectly with current interests in halogenated pharmaceutical intermediates, particularly for the development of kinase inhibitors and CNS-active compounds.

From a synthetic perspective, the p-toluenesulfonyl (tosyl) group in 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole serves multiple purposes: it protects the indole nitrogen during subsequent reactions, enhances the compound's stability, and facilitates purification processes. This feature makes it particularly valuable in multi-step syntheses where nitrogen protection is required.

The compound's applications extend beyond pharmaceutical development. Researchers exploring "indole-based materials chemistry" have shown interest in similar structures for creating organic electronic materials. While 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole itself hasn't been extensively studied in this context, its structural features suggest potential utility in designing functional organic materials with tailored electronic properties.

Quality control of 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole typically involves advanced analytical techniques. HPLC purity analysis, mass spectrometry, and NMR spectroscopy are commonly employed to verify the compound's identity and assess its suitability for sensitive synthetic applications. The growing emphasis on "high-purity chemical intermediates" in research publications reflects the importance of rigorous quality standards for such specialized compounds.

Storage and handling of 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole require standard laboratory precautions. The compound should be kept in a cool, dry environment, protected from light and moisture to maintain its stability. These handling considerations align with general best practices for nitrogen-containing heterocycles and halogenated organic compounds.

The synthetic accessibility of 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole from commercially available starting materials contributes to its popularity in research settings. Common synthetic routes often begin with appropriately substituted fluoro-indole precursors, followed by sequential bromination and tosylation steps. Optimization of these procedures remains an active area of investigation, as seen in recent publications focusing on "regioselective indole functionalization".

In the context of intellectual property, 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole has been referenced in several patent applications related to small molecule therapeutics. Its structural features make it a valuable scaffold for generating novel compounds with potential biological activity, particularly in areas addressing unmet medical needs.

Market availability of 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole has expanded in recent years, with multiple specialty chemical suppliers now offering this compound. The pricing and packaging options vary depending on quantity and purity requirements, reflecting its status as a research-grade chemical intermediate rather than a bulk commodity chemical.

Future research directions involving 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole may explore its utility in emerging areas such as proteolysis targeting chimeras (PROTACs) or covalent inhibitor design. The compound's well-defined reactivity profile and the growing interest in "halogen bonding in drug design" suggest it will remain relevant in medicinal chemistry innovation.

For researchers considering 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole for their projects, it's advisable to review recent literature on "indole derivative reactivity" and "fluorine in medicinal chemistry" to fully appreciate the compound's potential applications. The unique combination of bromine and fluorine substituents on the indole scaffold offers distinct opportunities for structural diversification and property modulation.

In summary, 3-Bromo-5-fluoro-1-(p-toluenesulfonyl)indole (CAS No. 887338-48-9) represents a valuable tool for synthetic chemists, particularly those working in pharmaceutical research and development. Its structural features, synthetic utility, and relevance to current trends in drug discovery ensure its continued importance in the field of specialty chemical intermediates.

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