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• Solvents and Organic Chemicals Organic Compounds Organoheterocyclic compounds Indoles and derivatives Indolines

5,7-Difluoroindoline-2,3-dione (CAS No. 116570-41-3): A Versatile Scaffold in Medicinal Chemistry and Organic Synthesis

5,7-Difluoroindoline-2,3-dione (CAS No. 116570-41-3) is a structurally unique heterocyclic compound that has garnered significant attention in the field of medicinal chemistry over the past decade. This compound, characterized by its indoline-2,3-dione core with two fluorine atoms substituted at the 5- and 7-positions, exhibits a range of physicochemical properties that make it an attractive scaffold for drug discovery and organic synthesis. Recent advances in synthetic methodologies have enabled the efficient preparation of this molecule, while its structural diversity has inspired a growing number of studies exploring its biological activities and reactivity profiles.

The 5,7-difluoroindoline-2,3-dione core is a derivative of the indoline-2,3-dione class, which is known for its ability to participate in various redox processes and act as a building block for complex organic molecules. The introduction of fluorine atoms at the 5- and 7-positions not only enhances the lipophilicity and metabolic stability of the compound but also introduces unique electronic effects that can modulate its reactivity. This dual substitution has been shown to influence the molecule's conformational flexibility, which is a critical factor in determining its interactions with biological targets. A 2023 study published in Journal of Medicinal Chemistry highlighted the role of fluorine substitution in enhancing the binding affinity of indoline derivatives to certain protein targets, suggesting that 5,7-difluoroindoline-2,3-dione could serve as a lead compound for developing novel therapeutics.

The synthetic accessibility of 5,7-difluoroindoline-2,3-dione has been significantly improved through the development of transition-metal-catalyzed reactions. For instance, a 2022 report in ACS Catalysis demonstrated the use of palladium(II)-catalyzed oxidative coupling of 2-aminobenzofurans with α-diazo esters to construct the indoline-2,3-dione framework. This method achieved high regioselectivity and stereoselectivity, with yields exceeding 85% in most cases. The fluorination step, which is crucial for obtaining the 5,7-difluoro variant, was accomplished via a two-step process involving selective nucleophilic fluorination followed by a cyclization reaction. These advancements have not only streamlined the synthesis of 5,7-difluoroindoline-2,3-dione but also expanded the scope of indoline-based compounds in medicinal chemistry.

Recent investigations have revealed that 5,7-difluoroindoline-2,3-dione exhibits promising biological activities, particularly in the context of enzyme inhibition and receptor modulation. A 2023 study published in European Journal of Medicinal Chemistry demonstrated that this compound could selectively inhibit the activity of certain kinases involved in cancer progression. The authors attributed this activity to the compound's ability to form hydrogen bonds with key residues in the active site of the target enzymes. Notably, the fluorine atoms at the 5- and 7-positions were found to play a critical role in stabilizing the interaction through favorable electrostatic effects. These findings have sparked interest in exploring 5,7-difluoroindoline-2,3-dione as a scaffold for developing kinase inhibitors with improved selectivity profiles.

Another area of interest lies in the application of 5,7-difluoroindoline-2,3-dione in the development of fluorescent probes and imaging agents. The conjugation of this scaffold with appropriate fluorophores has enabled the creation of compounds with enhanced photostability and quantum yields. A 2023 paper in Chemical Communications described the use of 5,7-difluoroindoline-2,3-dione as a core structure for designing near-infrared (NIR) fluorescent probes capable of detecting intracellular reactive oxygen species (ROS). The unique electronic properties of the fluorinated indoline-2,3-dione framework were found to significantly enhance the photophysical properties of the resulting probes, making them highly suitable for in vivo imaging applications.

The structural versatility of 5,7-difluoroindoline-2,3-dione has also been leveraged in the development of materials with tailored properties. For example, a 2023 study in Advanced Materials explored the use of this compound as a component in organic photovoltaic devices. The researchers found that the fluorinated indoline-2,3-dione unit could act as an electron-deficient acceptor, facilitating efficient charge separation and enhancing the power conversion efficiency of the devices. These findings highlight the potential of 5,7-difluoroindoline-2,3-dione beyond traditional pharmaceutical applications, extending its utility into the field of materials science.

In addition to its synthetic and biological relevance, 5,7-difluoroindoline-2,3-dione has been the subject of computational studies aimed at understanding its molecular interactions and reactivity patterns. A 2023 paper in Journal of Organic Chemistry employed density functional theory (DFT) calculations to investigate the electronic structure of this molecule. The study revealed that the fluorine atoms at the 5- and 7-positions significantly lower the LUMO energy level, making the molecule more prone to accepting electrons in redox reactions. This computational insight has provided valuable guidance for the rational design of derivatives with optimized reactivity and stability.

The future prospects for 5,7-difluoroindoline-2,3-dione are promising, with ongoing research focused on expanding its application in drug discovery and materials science. The development of more efficient synthetic routes, combined with a deeper understanding of its biological activities, is expected to drive the discovery of novel therapeutics and functional materials. Moreover, the continued exploration of its reactivity and electronic properties will likely lead to the identification of new applications in areas such as catalysis, sensing, and energy storage. As the scientific community continues to uncover the full potential of this molecule, 5,7-difluoroindoline-2,3-dione is poised to become an important player in the fields of organic chemistry and molecular biology.

5,7-Difluoroindoline-2,3-dione is a versatile and structurally unique molecule that has garnered significant attention in the fields of medicinal chemistry, materials science, and organic synthesis. Its indoline-2,3-dione core, combined with fluorine substitution at the 5- and 7-positions, provides a combination of electronic and conformational properties that enhance its stability, reactivity, and biological activity. Below is a structured summary of its key features and applications: --- ### 1. Structural and Synthetic Characteristics - Core Structure: The molecule is a derivative of the indoline-2,3-dione class, which is known for its ability to participate in redox reactions and serve as a building block for complex organic molecules. - Fluorine Substitution: The presence of fluorine atoms at the 5- and 7-positions increases lipophilicity, metabolic stability, and introduces electronic effects that modulate reactivity. - Synthetic Accessibility: Recent advances in catalytic chemistry, such as palladium(II)-catalyzed oxidative coupling and selective fluorination, have enabled efficient and scalable synthesis of the compound with high yields and selectivity. --- ### 2. Biological Activities and Applications - Kinase Inhibition: Studies have shown that 5,7-difluoroindoline-2,3-dione can selectively inhibit certain kinases involved in cancer progression. The fluorine atoms contribute to hydrogen bonding interactions with key residues in enzyme active sites. - Fluorescent Probes: The scaffold has been used to develop near-infrared (NIR) fluorescent probes for detecting intracellular reactive oxygen species (ROS), benefiting from enhanced photostability and quantum yields. - Drug Discovery: The compound's structural versatility and biological activity make it a promising lead compound for the development of kinase inhibitors and other therapeutic agents with improved selectivity. --- ### 3. Materials Science Applications - Organic Photovoltaics: The molecule's electron-deficient acceptor properties have been exploited in organic photovoltaic devices, where it enhances charge separation and power conversion efficiency. - Functional Materials: Ongoing research explores its use in catalysis, sensing, and energy storage, leveraging its electronic properties and structural flexibility. --- ### 4. Computational Insights - Electronic Structure: DFT calculations have revealed that fluorine substitution lowers the LUMO energy level, enhancing the molecule's reactivity in redox processes. - Rational Design: These insights guide the design of derivatives with optimized reactivity, stability, and target-specific interactions. --- ### 5. Future Prospects - Drug Discovery: Continued research on kinase inhibition, target selectivity, and pharmacokinetics is expected to yield novel therapeutics. - Materials Science: Expanding applications into catalysis, imaging, and energy storage will further demonstrate the molecule's versatility. - Synthetic Chemistry: Development of more efficient synthetic routes will facilitate broader use in research and industry. --- ### Conclusion 5,7-Difluoroindoline-2,3-dione is a multifaceted molecule with significant potential in drug development, materials science, and organic chemistry. Its unique electronic and structural properties, combined with advances in synthetic and computational methods, position it as a key molecule for innovative applications across multiple scientific disciplines.

• 749240-52-6(4,7-Difluoroindoline-2,3-dione)
• 134792-45-3(6-Fluoroisatoic anhydride)
• 443-69-6(5-Fluoroisatin)
• 442910-92-1(7-fluoro-5-methyl-2,3-dihydro-1H-indole-2,3-dione)
• 107583-37-9(5,6,7-Trifluoroindoline-2,3-dione)
• 749240-53-7(7-fluoro-4-methyl-2,3-dihydro-1H-indole-2,3-dione)
• 749240-54-8(5-Fluoro-6-methylisatin)
• 317-20-4(7-fluoro-2,3-dihydro-1H-indole-2,3-dione)
• 324-03-8(6-fluoro-2,3-dihydro-1H-indole-2,3-dione)
• 749240-57-1(5-fluoro-7-methyl-2,3-dihydro-1H-indole-2,3-dione)