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  Yaling Zhang,Chunhui Dai,Shiwei Zhou,Bin Liu Chem. Commun., 2018,54, 10092-10095
• 2. Dissociation of large gaseous serine clusters produces abundant protonated serine octamer
  Jacob S. Jordan,Evan R. Williams Analyst, 2021,146, 2617-2625
• 3. Excitation energies from ground-state density-functionals by means of generator coordinates
  A. B. F. da Silva,K. Capelle Phys. Chem. Chem. Phys., 2009,11, 4564-4569
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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Nitrobenzenes Nitrophenyl ethers

5-Fluoro-2-methoxy-4-nitrobenzaldehyde (CAS No. 678969-88-5): A Versatile Compound in Modern Pharmaceutical and Material Science Research

5-Fluoro-2-methoxy-4-nitrobenzaldehyde, with the chemical formula C₈H₆FO₄N, is a multifunctional aromatic compound that has garnered significant attention in the fields of medicinal chemistry, materials science, and synthetic organic chemistry. Its unique combination of functional groups—including the fluoro substituent, methoxy group, and nitro moiety—provides a versatile scaffold for the development of novel bioactive molecules and functional materials. The compound’s structural simplicity and reactivity make it a critical intermediate in the synthesis of various pharmaceuticals, agrochemicals, and advanced functional materials. Recent studies have highlighted its potential in the design of selective modulators for G-protein-coupled receptors (GPCRs) and its role in the development of stimuli-responsive polymers.

The 5-Fluoro-2-methoxy-4-nitrobenzaldehyde molecule features a benzene ring substituted with three functional groups: a fluoro atom at the 5-position, a methoxy group at the 2-position, and a nitro group at the 4-position. The aldehyde group (–CHO) at the 1-position further enhances its reactivity, enabling participation in a wide range of chemical transformations such as nucleophilic addition, condensation, and oxidation reactions. This structural diversity makes it an ideal building block for the synthesis of complex molecules with tailored biological activities. The fluoro substitution, in particular, has been shown to significantly influence the electronic properties of the molecule, which can modulate its interaction with biological targets such, as enzymes or receptors.

Recent advances in medicinal chemistry have demonstrated the utility of 5-Fluoro-2-methoxy-4-nitrobenzaldehyde in the development of small molecule therapeutics. A 2023 study published in *Journal of Medicinal Chemistry* reported the synthesis of a series of 5-Fluoro-2-methoxy-4-nitrobenzaldehyde derivatives with potent anti-inflammatory and anti-cancer activities. The researchers utilized the nitro group as a directing group to facilitate the selective introduction of functional groups at specific positions, enabling the design of molecules with enhanced selectivity and reduced off-target effects. This approach has significant implications for the treatment of chronic inflammatory diseases and malignancies, where traditional therapies often face challenges related to toxicity and resistance.

Another area of active research involves the application of 5-Fluoro-2-methoxy-4-nitrobenzaldehyde in the development of functional materials. In a 2024 study published in *Advanced Materials*, scientists explored the use of this compound as a key component in the synthesis of stimuli-responsive hydrogels. The methoxy group was found to enhance the hydrophilicity of the material, while the nitro group provided a means of fine-tuning the mechanical properties of the hydrogel through controlled cross-linking. These materials have potential applications in drug delivery systems, tissue engineering, and smart coatings, where responsive behavior to environmental stimuli is critical.

From a synthetic perspective, the 5-Fluoro-2-methoxy-4-nitrobenzaldehyde molecule is a valuable intermediate in the preparation of various heterocyclic compounds. A 2022 study in *Organic Letters* described a novel synthetic route to access 5-Fluoro-2-methoxy-4-nitrobenzaldehyde derivatives through a cascade reaction involving electrophilic substitution and nucleophilic attack. This method not only improves the efficiency of the synthesis but also reduces the number of steps required to produce complex molecules, which is particularly important in the context of drug discovery where rapid and scalable synthesis methods are essential.

Furthermore, the fluoro substitution in 5-Fluoro-2-methoxy-4-nitrobenzaldehyde has been shown to influence its metabolic stability and pharmacokinetic properties. A 2021 review in *Drug Metabolism and Disposition* highlighted the role of fluorine atoms in enhancing the lipophilicity of molecules, which can improve their ability to cross biological membranes and reach target tissues. This property is particularly advantageous in the development of drugs for central nervous system (CNS) disorders, where the blood-brain barrier poses a significant challenge. The nitro group, on the other hand, may contribute to the molecule’s redox activity, which could be harnessed for the design of antioxidants or anti-oxidative stress agents.

While the 5-Fluoro-2-methoxy-4-nitrobenzaldehyde compound offers numerous opportunities for scientific exploration, its synthesis and handling require careful consideration of safety and environmental impact. The nitro group is inherently reactive and can participate in explosive reactions under certain conditions, necessitating strict adherence to laboratory protocols. Additionally, the fluoro substitution may lead to the formation of perfluorinated compounds during degradation, which have raised concerns regarding their environmental persistence and potential toxicity. Ongoing research is focused on developing greener synthetic methods and biodegradable derivatives to mitigate these risks.

In conclusion, 5-Fluoro-2-methoxy-4-nitrobenzaldehyde (CAS No. 678969-88-5) stands as a remarkable example of how functional group diversity can drive innovation in multiple scientific disciplines. Its role in pharmaceutical development, materials science, and synthetic chemistry underscores the importance of continued research into its properties and applications. As new technologies and methodologies emerge, the potential of this compound is likely to expand further, opening new avenues for the design of advanced therapeutics and functional materials.

• 136507-15-8(2-Methoxy-4-nitrobenzaldehyde)
• 219539-49-8(Benzaldehyde, 2-[(3-fluorophenyl)methoxy]-5-nitro-)
• 122455-84-9(4-Fluoro-2-methyl-5-nitrophenol)
• 536977-16-9(BENZENE, 4-(2,4-DIMETHYLPHENOXY)-2-FLUORO-1-NITRO-)
• 60972-13-6(Methanone, (5-fluoro-2-methoxyphenyl)(4-nitrophenyl)-)
• 151793-17-8(Methyl 4-Fluoro-2-methoxy-5-nitrobenzoate)
• 134882-63-6(4-Fluoro-2-methyl-5-nitroanisole)
• 1134-43-6(Benzaldehyde, 2-ethoxy-4-nitro-)
• 60972-12-5(Methanone, (5-fluoro-2-methoxyphenyl)(3-nitrophenyl)-)
• 57388-43-9(2-(4-Fluorophenoxy)-5-nitrobenzaldehyde)