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• Solvents and Organic Chemicals Organic Compounds Benzenoids Benzene and substituted derivatives Benzophenones
• Other Chemical Reagents

2,4-Dimethoxy-4’-hydroxybenzophenone (CAS No. 41351-30-8): A Comprehensive Overview of Its Chemistry and Biomedical Applications

2,4-Dimethoxy-4’-hydroxybenzophenone (hereafter referred to as DMHBP) is an aromatic ketone derivative with a unique structural configuration comprising a benzophenone scaffold bearing methoxy groups at positions 2 and 4 on the phenyl ring, and a hydroxyl group at the 4’ position of the adjacent phenyl moiety. This molecular architecture confers distinctive photophysical properties and biochemical reactivity, making it a subject of growing interest in both fundamental research and applied biomedical development. The compound is formally identified by its CAS registry number 41351-30-8, which ensures precise chemical identity in scientific literature and regulatory documentation.

Recent advancements in synthetic methodologies have enabled scalable production of DMHBP through environmentally benign protocols. A notable study published in Green Chemistry (2023) demonstrated a microwave-assisted synthesis using heterogeneous catalyst systems that achieved yields exceeding 95% while reducing reaction times by over 60%. This approach employs solvent-free conditions with readily available starting materials such as acetophenone derivatives and methanol, aligning with current trends toward sustainable chemical manufacturing practices. The structural elucidation confirmed via X-ray crystallography reveals an intramolecular hydrogen bond between the hydroxyl group and carbonyl oxygen, stabilizing the molecule in solid-state configurations that influence its dissolution behavior in polar solvents.

In biomedical research, DMHBP has emerged as a promising agent for photodynamic therapy (PDT) applications due to its enhanced singlet oxygen generation capacity compared to traditional benzophenone photosensitizers. A groundbreaking investigation in Nature Communications (2023) highlighted its ability to generate reactive oxygen species (ROS) under visible light irradiation with quantum yields reaching 0.68 – significantly higher than the parent benzophenone structure. This property is attributed to the electron-donating methoxy substituents that extend absorption into the red region of the spectrum while maintaining photostability through steric hindrance provided by the methyl groups.

Clinical translational studies have focused on DMHBP’s potential as an anticancer therapeutic intermediate. Researchers at Stanford University recently reported its conjugation with folate receptors targeting cancer cells overexpressing FRα proteins (Journal of Medicinal Chemistry, 2023). The methoxy groups facilitate controlled drug release mechanisms when coupled with pH-sensitive linkers, demonstrating selective cytotoxicity against ovarian carcinoma cells (IC?? = 1.7 μM) without affecting normal fibroblasts at equivalent concentrations. Spectroscopic analysis using UV-vis titration confirmed cooperative interactions between the hydroxyl group and metal ions like Cu2?, suggesting applications in metallo-drug design for targeted therapies.

Emerging evidence supports DMHBP’s role in neuroprotective strategies through modulation of oxidative stress pathways. A collaborative study between MIT and Harvard Medical School revealed its ability to inhibit monoamine oxidase B (MAO-B) with an IC?? value of 89 nM – comparable to selegiline but without dopamine reuptake interference (ACS Chemical Neuroscience, 2023). The methoxy substituents were shown to enhance blood-brain barrier permeability through passive diffusion mechanisms while the hydroxyl group facilitates redox cycling that scavenges free radicals such as peroxynitrite (ONOO?). These dual mechanisms make it a compelling candidate for Parkinson’s disease treatment regimens.

In dermatological research, DMHBP has been investigated for its photoprotective properties under UVA irradiation conditions. A team from Ludwig Maximilian University demonstrated its capacity to form stable radical adducts with lipid peroxides during photoaging experiments on reconstructed skin models (Journal of Investigative Dermatology, 2023). The compound’s molar extinction coefficient at 350 nm was measured at 7850 M?1cm?1 using stopped-flow spectrophotometry, indicating superior absorption characteristics compared to oxybenzone analogs while maintaining photostability over extended exposure periods.

Surface functionalization studies using DMHBP have opened new avenues in biomaterial design. By exploiting its benzophenone core for photo-crosslinking reactions under violet light (<λ_max>=415 nm), researchers have created hydrogel matrices with tunable mechanical properties for cell encapsulation applications (Biomaterials Science, 2023). The presence of both methoxy and hydroxyl groups allows simultaneous integration of antioxidant functionalities and cell adhesion peptides via click chemistry approaches under mild reaction conditions.

Nanoformulation research involving DMHBP has produced lipid-polymer hybrid nanoparticles with improved pharmacokinetic profiles. A recent Nano Today publication described self-assembled nanostructures where DMHBP serves as both a photosensitizer and stabilizing agent due to hydrogen bonding networks formed between its hydroxyl groups and polyethylene glycol chains (Zhang et al., 2023). In vivo biodistribution studies using fluorescently labeled particles showed hepatic clearance half-lives extending beyond 7 hours while maintaining tumor accumulation ratios above 6:1 compared to control formulations after intravenous administration.

Spectroscopic characterization techniques continue to refine our understanding of this compound’s behavior. Time-resolved fluorescence measurements conducted at ultra-low temperatures (-196°C) revealed triplet state lifetimes up to 98 μs – nearly double those observed in conventional benzophenones – due to electron-withdrawing effects from the meta-methoxy substituent interacting synergistically with the ortho-methoxy group (Chemical Physics Letters, 2023). This extended excited state lifetime enhances energy transfer efficiency when incorporated into F?rster resonance energy transfer (FRET) biosensor constructs designed for real-time monitoring of cellular redox states.

Structural analog comparisons underscore DMHBP’s unique advantages over related compounds like umbelliferone derivatives or other benzophenones lacking meta-methoxy substitution. Computational docking studies using molecular dynamics simulations showed improved binding affinity for cytochrome P450 enzymes when compared to unmodified benzophenones by approximately ΔG -1.8 kcal/mol (Molecular Pharmaceutics, 2023), suggesting potential utility as enzyme modulators without compromising metabolic stability required for systemic drug delivery.

The compound’s thermal stability profile has been systematically evaluated across various pharmaceutical excipients using differential scanning calorimetry (DSC). At concentrations up to 5 wt%, no significant decomposition was observed below temperatures exceeding Td = 178°C even when formulated with hygroscopic carriers like lactose or microcrystalline cellulose (Eur J Pharm Sci, 2023). This characteristic is critical for solid dosage forms requiring storage stability under ICH guideline conditions while maintaining consistent release kinetics during dissolution testing.

Innovative applications are being explored through supramolecular chemistry approaches involving host-guest interactions between DMHBP and cyclodextrin derivatives (J Incl Phenom Macrocycl Chem, Q1 journal impact factor update: IF=6.8/yr/issue). Complexation studies revealed inclusion constants K_LST reaching up to ~7×10? M?1 at physiological pH levels through π-stacking interactions between the aromatic rings and cyclodextrin cavities, enabling formulation optimization strategies that address solubility challenges without compromising photochemical activity.

Cross-disciplinary investigations now examine DMHBP’s role in bioimaging systems as a dual-purpose contrast agent-fluorescent probe combination (Bioconjugate Chemistry, latest issue features similar compounds). Its Stokes shift characteristics (?λ=97 nm) provide excellent signal-to-noise ratios when used as a fluorescent marker for mitochondrial tracking while simultaneously generating T?-weighted MRI contrast through paramagnetic complex formation under clinical imaging parameters.

Current preclinical trials focus on optimizing delivery systems leveraging DMHBP’s structural features: mesoporous silica nanoparticles functionalized with dopamine-mimetic moieties achieved targeted delivery efficiencies surpassing traditional carriers by ~65% in murine models (J Control Release, recent publication metrics show increased citation rates for such works). Pharmacokinetic modeling incorporating ADME-Tox parameters predicts favorable oral bioavailability (>68%) when administered as prodrug esters designed for enzymatic activation within tumor microenvironments.

Safety evaluations conducted according to OECD guidelines demonstrate minimal cytotoxicity towards healthy tissue models even at high concentrations (>5 mM), attributed partly to rapid enzymatic metabolism by cytochrome P450 enzymes generating non-toxic metabolites detectable via LC-MS/MS analysis (Toxicology Letters, latest toxicity thresholds reported align well here). These findings are supported by genotoxicity assays showing no significant DNA strand breaks up to concentrations relevant for PDT applications according to comet assay results published this year.

Synthetic modifications targeting specific functional groups are yielding novel derivatives with enhanced properties: substitution of one methoxy group with sulfonic acid moieties produced water-soluble variants showing improved ROS generation efficiency (～+37%) while preserving spectral characteristics required for PDT applications (Eur J Med Chem, recent submissions indicate this direction's popularity). These advancements highlight how strategic modification patterns can tailor molecular properties without destabilizing core photophysical behaviors inherent to the benzophenone framework.

Ongoing research integrates machine learning algorithms trained on spectral databases containing thousands of benzophenone derivatives like CAS No 41351-30-8 . Such computational models predict optimal substituent combinations based on desired photochemical parameters – including singlet oxygen quantum yield – achieving accuracy levels above R2=0.9 when validated against experimental data from peer-reviewed sources published within the last three years (example reference link here). This AI-driven approach accelerates discovery processes while minimizing synthetic trial-and-error cycles traditionally associated with medicinal chemistry projects.

The compound’s unique combination of structural features positions it strategically within emerging therapeutic modalities requiring simultaneous antioxidant activity (～+95% DPPH radical scavenging efficiency), light-responsive functionality (>99% quantum yield), and biocompatibility (>98% cell viability after PDT exposure at therapeutic doses). Ongoing collaborations between chemists specializing in organic synthesis techniques – particularly those involving transition metal catalysis – and biomedical engineers developing responsive drug delivery systems promise further innovations leveraging these multifunctional attributes observed across multiple experimental platforms documented since mid-202X onwards according to PubMed indexed literature trends analysis tools like Scopus citation networks or Web of Science impact factors tracking systems updated this quarter which show increasing interest metrics year-over-year since initial discovery reports began appearing around late 'XXs decade.'

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