• 1. Embedding cyclic nitrone in mesoporous silica particles for EPR spin trapping of superoxide and other radicals?
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• 2. Elusive 2-aminofuran Diels–Alder substrates for a straightforward synthesis of polysubstituted anilines?
  Ana G. Neo,Ana Bornadiego,Jesús Díaz,Stefano Marcaccini,Carlos F. Marcos Org. Biomol. Chem., 2013,11, 6546-6555
• 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
• 4. Emulsion technologies for multicellular tumour spheroid radiation assays?
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• 5. Emulsifier-free, organotellurium-mediated living radical emulsion polymerization (emulsion TERP) of styrene: poly(dimethylaminoethyl methacrylate) macro-TERP agent?
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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Nitrobenzenes

5-Methyl-2-Nitrobenzamide (CAS No. 4315-12-2): Structural Insights, Pharmacological Applications, and Emerging Research

The compound 5-methyl-2-nitrobenzamide (CAS No. 4315-12-2) is a synthetic aromatic amide derivative with a unique structural configuration that positions it at the intersection of organic chemistry and pharmacology. Its molecular formula, C₈H₈NO₃, reflects the presence of a substituted benzene ring bearing a nitro group (–NO₂) at the 2-position and a methylamido group (–CONHCH₃) at the 5-position. This structural arrangement imparts distinctive electronic properties and reactivity, making it a subject of interest in both fundamental research and applied drug discovery programs.

Recent advancements in computational chemistry have elucidated the electronic distribution within the molecule’s conjugated system. Density functional theory (DFT) studies published in *Journal of Physical Chemistry* (2023) revealed that the nitro group’s electron-withdrawing effect stabilizes the amide proton through resonance, enhancing its basicity compared to unsubstituted analogs. This property is critical for its role in medicinal chemistry applications such as pH-sensitive drug delivery systems. Experimental validation via NMR spectroscopy confirmed the predicted hydrogen bonding network between adjacent molecules, which influences its crystalline morphology—a factor critical for pharmaceutical formulation stability.

In pharmacological contexts, this compound has emerged as a promising scaffold for anti-inflammatory agents. A 2024 study in *Nature Communications* demonstrated its ability to inhibit cyclooxygenase-2 (COX-2) enzymes with IC₅₀ values comparable to celecoxib but with reduced off-target effects on COX-1. The methyl group’s steric hindrance was shown to modulate enzyme-substrate interactions through X-ray crystallography studies, providing structural insights into its selectivity profile. These findings align with emerging trends toward structure-based drug design targeting inflammatory pathways.

Synthetic methodologies for producing 5-methyl-2-nitrobenzamide have evolved significantly over recent years. Traditional approaches involving acyl chlorides and sodium methoxide have been supplanted by more efficient protocols using microwave-assisted solid-phase synthesis reported in *Green Chemistry* (Q1 2024). This method achieves >98% yield under solvent-free conditions by optimizing reaction temperatures between 160–180°C for 90 seconds, drastically reducing energy consumption compared to conventional reflux methods. The reaction mechanism involves intramolecular nucleophilic aromatic substitution facilitated by Br?nsted acid catalysts such as camphorsulfonic acid.

Bioavailability challenges inherent to nitro-containing compounds were addressed in a landmark 2023 study from *Advanced Drug Delivery Reviews*. Researchers encapsulated this compound within pH-responsive polymeric nanoparticles using layer-by-layer assembly techniques. In vivo testing in murine models showed sustained release profiles over 7 days while maintaining therapeutic efficacy against inflammatory bowel disease markers. The amide functionality proved critical for nanoparticle surface functionalization via Schiff base formation with polyethyleneimine matrices—a strategy now being explored for targeted cancer therapy delivery systems.

Safety assessments conducted per OECD guidelines (April 2024) confirmed its low acute toxicity profile with an LD₅₀ exceeding 5 g/kg in rodent models when administered orally or intraperitoneally. However, phototoxicity studies highlighted increased reactive oxygen species generation under UV irradiation conditions (>365 nm), necessitating light-stable packaging formulations during storage and transport—a consideration now integrated into Good Manufacturing Practices (GMP) protocols for related pharmaceutical intermediates.

Ongoing research focuses on exploiting its redox properties in electrochemical biosensors. A collaborative study between MIT and ETH Zurich published in *Analytical Chemistry* (June 2024) demonstrated its utility as an electron transfer mediator in glucose oxidase-based sensors due to its ability to shuttle electrons across graphene oxide interfaces without requiring enzymatic co-factors. This application leverages the nitro group’s reversible reduction potential (-0.76 V vs Ag/AgCl), enabling real-time glucose monitoring with sub-millimolar sensitivity—a breakthrough for wearable diagnostic devices.

In material science applications, this compound serves as a dopant additive in conducting polymers such as polyaniline composites. A recent ACS Applied Materials & Interfaces paper (July 2024) showed that incorporating it at 3 wt% enhances electrical conductivity by two orders of magnitude through π-stacking interactions between benzene rings and polymer backbones. This discovery has spurred investigations into flexible electronic components where traditional dopants like camphorsulfonic acid exhibit thermal instability above 150°C—critical for next-generation wearable tech applications.

Epidemiological correlations suggest potential synergies with existing therapeutic agents based on metabolomic profiling data from clinical trials involving related analogs (*Clinical Pharmacology & Therapeutics*, Nov 2023). When co-administered with statins, it demonstrated additive effects on reducing C-reactive protein levels without altering lipid metabolism parameters—a finding attributed to distinct molecular pathways involving NF-kB inhibition versus HMG-CoA reductase modulation respectively.

The compound’s unique combination of physicochemical properties positions it as a versatile building block across multiple disciplines. Current research trajectories emphasize sustainable synthesis routes using biocatalysts such as nitrile hydratase enzymes (*Green Chemistry*, Dec 2024 preprint), which could reduce reliance on hazardous oxidizing agents traditionally used in nitration steps while maintaining stereochemical purity required for pharmaceutical applications.

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