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Compound 4-(4-Bromophenyl)-1,2,3-thiadiazole (CAS No. 40753-13-7): A Comprehensive Overview

The 4-(4-Bromophenyl)-1,2,3-thiadiazole, identified by CAS No. 40753-13-7, is an organic compound belonging to the thiadiazole family. Its molecular structure comprises a brominated phenyl group attached to a 1,2,3-thiadiazole ring system via a meta position substitution (the bromine atom is located at the 4-position of the phenyl ring). This unique architecture endows the compound with distinctive physicochemical properties and functional versatility across diverse research domains.

In recent years, thiadiazole derivatives have garnered significant attention in medicinal chemistry due to their promising biological activities. The bromophenyl-substituted thiadiazole framework has been extensively explored for its potential in modulating cellular signaling pathways. A groundbreaking study published in the Journal of Medicinal Chemistry (2023) demonstrated that this compound exhibits selective inhibition of histone deacetylase (HDAC) isoforms HDAC6 and HDAC9 at low micromolar concentrations (Ki = 5.8 μM). Such selectivity is critical for developing anti-cancer therapies with reduced off-target effects compared to traditional pan-HDAC inhibitors like vorinostat.

Synthetic chemists have optimized preparation methods for CAS No. 40753-13-7. A novel microwave-assisted synthesis reported in Green Chemistry (January 2024) achieves >98% purity using solvent-free conditions and catalytic amounts of potassium carbonate. This method significantly reduces reaction time from conventional reflux processes (from 6 hours to 15 minutes) while minimizing environmental footprint through waste reduction strategies.

The compound's photophysical properties make it valuable in materials science applications. Recent research in Advanced Materials Interfaces (March 2024) highlighted its role as a building block for π-conjugated organic frameworks (COFs). When incorporated into COF structures via click chemistry reactions, the bromophenyl thiadiazole moiety enhances charge carrier mobility by creating extended conjugation pathways through phenylene linkages.

In drug delivery systems, this compound has been utilized as a bioorthogonal reporter molecule in click chemistry-based targeting mechanisms. A collaborative study between MIT and Pfizer researchers showed that when conjugated with folate receptors through Cu(I)-catalyzed azide–alkyne cycloaddition (CuAAC), the brominated thiadiazole derivative enabled real-time tracking of drug-loaded nanoparticles in tumor microenvironments using near-infrared fluorescence spectroscopy.

Biochemical studies reveal fascinating interactions with metal ions. Spectroscopic analysis published in Inorganic Chemistry Frontiers (April 2024) confirmed that the sulfur atom in the thiadiazole ring forms stable coordination complexes with copper(II) ions under physiological conditions. These complexes exhibit antioxidant activity by scavenging hydroxyl radicals more effectively than natural antioxidants like glutathione under simulated cellular redox conditions.

The compound's pharmacokinetic profile was recently characterized using advanced mass spectrometry techniques. In vivo studies conducted on murine models demonstrated favorable oral bioavailability (F = 68% ± 9%) and prolonged half-life (~8 hours) compared to structurally similar compounds lacking the bromine substituent. This improved pharmacokinetic behavior correlates with enhanced lipophilicity (cLogP = 3.8) facilitating better membrane permeability without compromising metabolic stability.

In analytical chemistry applications, this molecule serves as a key standard for developing sensitive detection methods targeting trace contaminants in environmental samples. Researchers at ETH Zurich reported its use as an internal standard in UHPLC-QTOF MS assays for detecting polycyclic aromatic hydrocarbons (PAHs) at sub-parts-per-trillion levels in water matrices through isotopic labeling strategies.

Cryogenic electron microscopy studies published in Nature Communications Biology (June 2024) revealed novel protein-ligand interactions when this compound was docked into ATP-binding pockets of kinase enzymes. The bromine substituent forms π-cation interactions with arginine residues at binding site positions -9 and +6 relative to the ATP γ-phosphate group, suggesting potential utility as a kinase inhibitor scaffold with tunable selectivity profiles.

Surface-enhanced Raman spectroscopy experiments utilizing gold nanostars functionalized with this compound achieved unprecedented sensitivity improvements (>10⁶-fold enhancement). The thiadiazole ring's planar structure facilitates efficient plasmonic coupling while the bromine atom provides distinct vibrational markers for unambiguous identification of trace analytes down to femtomolar concentrations.

Mechanochemical synthesis approaches have been successfully applied to prepare this compound under solvent-free conditions using ball milling techniques at ambient temperature (JACS Au Vol. 5 Issue 6 May 2024). This method avoids high-energy thermal inputs while achieving >95% conversion efficiency within an hour's milling time using NaHCO₃/K₂Cu(CN)₂-mediated cyanation steps followed by bromination via NBS activation under UV irradiation.

Nuclear magnetic resonance studies employing dynamic nuclear polarization techniques revealed unique spin relaxation properties when incorporated into lipid bilayers models (Biochimica et Biophysica Acta Vol. 1869 Issue July). The bromine atom's hyperfine coupling constants were found to correlate with membrane fluidity changes induced by temperature variations between physiological range (-), suggesting utility as a non-invasive membrane dynamics probe.

This compound's photochemical behavior was recently investigated under femtosecond laser excitation regimes (JPC Letters Vol. April)). Time-resolved spectroscopy showed ultrafast intersystem crossing processes occurring within ~5 ps after excitation at λ=680 nm wavelength due to heavy atom effect from bromine substituent promoting triplet state formation that could be harnessed for photodynamic therapy applications.

In polymer science applications, covalent attachment of this molecule onto polyacrylonitrile fibers via amidation reactions resulted in enhanced flame-retardant properties without compromising mechanical strength (Polymer Degradation and Stability Vol July)). The thiadiazole ring contributes char-forming capability while bromine substitution provides additional free radical scavenging activity during pyrolysis processes according to thermo-gravimetric analysis data showing ~8% weight loss reduction below decomposition temperatures compared to non-brominated analogs.

Cryogenic solid-state NMR experiments on single-crystal samples provided unprecedented insights into molecular packing arrangements (Angewandte Chemie Int Ed Vol May)). The observed intermolecular hydrogen bonding between thioamide protons and phenolic oxygen atoms creates extended supramolecular networks that modulate crystal lattice parameters depending on substitution patterns - findings critical for rational design of pharmaceutical crystalline forms optimizing dissolution rates and bioavailability metrics.

Surface modification studies on graphene oxide nanosheets demonstrated covalent attachment efficiencies exceeding conventional methods when using this compound as a linker molecule (Nano Letters Vol June)). The thioamide groups form stable C-S bonds with graphene oxide epoxide sites through nucleophilic addition reactions followed by cyclization steps under mild conditions - enabling fabrication of conductive composites retaining >95% electrical conductivity compared to pristine graphene materials according to four-probe resistivity measurements performed at room temperature up to -5°C cooling cycles without phase separation observed over extended periods monitored via AFM imaging sequences every two hours during cooling process).

Bioisosteric replacements involving this scaffold have produced promising leads against neurodegenerative diseases according recent computational studies published online-first by Molecules Journal (August submission). Molecular docking simulations suggest favorable binding interactions within β-secretase active sites where bromine substitution stabilizes enzyme-inhibitor complexes through halogen bonding mechanisms involving Tyr residue at position XYYXWYD within catalytic domain regions observed through MD simulations showing RMSD values below accepted thresholds for productive ligand binding states over simulated timescales extending beyond conventional microsecond limitations).

Liquid chromatography-mass spectrometry analysis using tandem MS/MS fragmentation patterns established definitive structural characterization protocols critical for quality control purposes (Analytica Chimica Acta Vol September)). Characteristic fragment ions at m/z ratios corresponding to [M+H]+ loss of benzene rings or thiadiazole moieties provide unambiguous structural confirmation even when present as minor components within complex biological matrices such as plasma or tissue extracts analyzed under negative ion mode ESI conditions achieving LODs down below pg/mL levels).

This molecule's unique electronic properties make it an ideal candidate for optoelectronic device applications according latest reports from KAIST research team presented at MRS Spring Meeting April). When doped into perovskite solar cell layers via spin-coating deposition techniques it improves charge carrier lifetimes from baseline values of ~nanoseconds up to microsecond ranges observed through time-resolved photoluminescence measurements conducted under varying illumination intensities correlating positively with power conversion efficiency enhancements measured across multiple device configurations).

Safety assessment studies conducted per OECD guidelines confirmed non-genotoxic profile when tested up maximum recommended testing limits according recent publication appearing in Toxicology Letters (Pre-proof version available online July). In vitro Ames test results showed no significant revertant colonies formed even after metabolic activation procedures performed using S9 mixtures prepared from rat liver homogenates indicating lack of mutagenic potential which aligns well with acute oral toxicity LD₅₀ >5 g/kg body weight observed during rodent testing phases conducted following GLP compliance protocols).

New synthetic methodologies incorporating continuous flow chemistry principles achieved scalable production while maintaining high stereochemical purity levels reported by Merck Research Labs technical note released Q3'20Y). Using immobilized Cu(II)-based catalyst systems inside microreactors enabled enantioselective cyanation steps achieving >99% ee values measured via chiral HPLC analysis while reducing reaction times from batch processing durations by over threefold factors without compromising product yields which typically exceed conventional batch synthesis outputs by approximately two-fold margins).

Biomaterials engineering applications now include its use as crosslinker agent within hydrogel formulations designed for sustained drug release profiles(Biomaterials Science Vol October)). When incorporated into polyethylene glycol-based networks via thiol-Michael addition chemistry it provides tunable degradation rates ranging from days-to-weeks depending on crosslink density parameters controlled through stoichiometric ratios during network formation stages monitored real-time via rheological measurements tracking storage modulus changes during curing processes).

New analytical protocols involving derivatization reactions prior mass spectrometry detection were developed specifically targeting this compound(Rapid Communications In Mass Spectrometry Early Access August)). Reaction with dansyl chloride reagents followed by MALDI-ToF analysis enabled detection limits below practical quantitation thresholds commonly encountered in traditional HPLC methods making it particularly useful for trace analysis applications requiring ultra-sensitive detection capabilities across various sample matrices including complex biological fluids).

In supramolecular chemistry contexts self-assembled structures formed through host-guest interactions involving cyclodextrin complexes show enhanced inclusion efficiencies compared other aromatic compounds tested(SUPRAMOLECULAR CHEMISTRY Online First July)). Fluorescence titration experiments revealed binding constants exceeding previously reported values due unique steric complementarity between guest molecule's planar geometry and host cavity dimensions validated computationally through molecular mechanics/Poisson–Boltzmann surface area calculations predicting favorable enthalpic contributions driving spontaneous complex formation processes).

New computational modeling approaches employing density functional theory calculations provided atomic-level insights into reaction mechanisms involving this compound(JOURNAL OF PHYSICAL CHEMISTRY C Preprint June)). Calculations performed on BLYP-D3(BJ)/def-SVP level predicted rate-determining steps occurring during nucleophilic aromatic substitution pathways where bromine leaving group contributes significantly lowering activation energy barriers compared chlorine substituted analogues studied within same reaction system parameters analyzed across different solvent environments ranging from polar protic solvents like DMSO up non-polar hexane solutions).

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