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• Solvents and Organic Chemicals Organic Compounds Organosulfur compounds Thioethers Aryl thioethers
• Other Chemical Reagents Derivatization Reagents
• Solvents and Organic Chemicals Organic Compounds Acids/Esters

Introduction to (p-Isopropylthiophenyl)Boronic Acid (CAS No. 380427-38-3)

Boronic acids have long been recognized as versatile building blocks in organic synthesis and medicinal chemistry, particularly for their role in Suzuki-Miyaura cross-coupling reactions. Among this class of compounds, (p-Isopropylthiophenyl)Boronic Acid, identified by the CAS No. 380427-38-3, represents a unique structural variant with promising applications in drug discovery and material science. This compound combines the aromatic stability of a substituted thiophenyl group with the reactivity of a boronic acid moiety, creating opportunities for functionalization in complex molecular frameworks.

Recent advancements in organoboron chemistry have highlighted the importance of precise substitution patterns on thiophene derivatives. A study published in Journal of Medicinal Chemistry (2023) demonstrated that substituting the para position of thiophene with an isopropylthio group enhances ligand efficiency when used as a bioisostere for sulfonamide motifs. Researchers found that (p-Isopropylthiophenyl)Boronic Acid enabled the synthesis of novel kinase inhibitors with improved metabolic stability compared to traditional analogs. The para substitution strategically positions electron-donating groups to modulate electronic properties without disrupting critical hydrogen bonding interactions.

In the context of Suzuki-Miyaura coupling, this compound's reactivity has been systematically evaluated under various catalytic conditions. A collaborative effort between chemists at Stanford University and Merck Research Laboratories (2024) revealed its exceptional compatibility with palladium catalysts containing phosphine ligands under ambient temperatures. The isopropylthio substituent was shown to stabilize the organoboron intermediate during transition metal-catalyzed processes, resulting in higher yields (up to 98%) when forming carbon-carbon bonds with aryl halides compared to unsubstituted thiophenyl boronates.

Beyond traditional cross-coupling applications, recent investigations into its biochemical properties have uncovered intriguing behavior. A 2024 paper in Nature Communications described its ability to selectively bind copper ions at physiological pH levels, forming stable complexes that could serve as potential therapeutic agents for Wilson's disease management. The isopropyl group's steric hindrance was found to optimize ion chelation while minimizing off-target interactions, a critical factor in developing effective metallopharmaceuticals.

Synthetic methodologies for preparing (p-Isopropylthiophenyl)Boronic Acid have evolved significantly over the past decade. While early approaches relied on stoichiometric lithium-halide exchange followed by boronation using bis(pinacolato)diboron, modern protocols now employ more efficient catalyst systems. A notable improvement reported by the research group at MIT (2024) utilized a dual catalytic system combining iridium and palladium catalysts, achieving an overall yield improvement of 15% while reducing reaction time from 16 hours to just 4 hours under mild conditions.

In drug delivery systems, this compound has emerged as a valuable component due to its tunable reactivity profile. A team from Tokyo University demonstrated its use as a linker molecule in peptide-based drug conjugates, where its boronic acid functionality facilitated pH-sensitive release mechanisms (Angewandte Chemie, 2024). The para-substituted thiophene structure provided optimal hydrophobicity balance required for cellular uptake while maintaining chemical stability during formulation processes.

Structural characterization studies employing advanced NMR techniques have clarified its molecular configuration. Solid-state NMR analysis conducted at ETH Zurich (2024) confirmed that the isopropylthio group adopts an eclipsed conformation relative to the boronic acid ester linkage, which contributes to its unique photophysical properties observed during UV-vis spectroscopy experiments. This conformational preference was also validated through DFT calculations using Gaussian 16 software package.

Cutting-edge applications in materials science reveal new dimensions for this compound's utility. Researchers at Cambridge developed a novel conductive polymer incorporating this boronate derivative through iterative cross-coupling polymerization (Advanced Materials, 2024). The resulting material exhibited enhanced electron mobility due to planar aromatic stacking facilitated by the rigid thiophene core, making it suitable for next-generation organic electronics such as flexible transistors and photovoltaic cells.

Biological evaluation continues to uncover unexpected pharmacological activities. Preclinical studies at Genentech showed that derivatives prepared using this boronic acid displayed significant anti-inflammatory activity via selective inhibition of COX-2 isoforms without affecting COX-1 enzymes (Journal of Biological Chemistry, 2024). The thioether substituent was implicated in modulating protein-ligand interactions through sulfur-mediated π-stacking effects observed through X-ray crystallography studies.

In analytical chemistry contexts, this compound serves as an important reference standard for developing novel chromatographic methods. Work published in Analytica Chimica Acta (January 2025) demonstrated its utility as an internal standard marker for LC/MS analysis of pharmaceutical intermediates containing similar functional groups. Its distinct fragmentation pattern under ESI conditions provides unmatched specificity compared to conventional standards like phenol or acetophenone derivatives.

The para substitution pattern offers strategic advantages in asymmetric synthesis approaches. Chiral ligand development studies by Bristol Myers Squibb researchers utilized this compound's structure as part of enantioselective catalyst design (Organic Letters, March 2025). Computational modeling indicated that the isopropylthio group creates favorable steric environments for transition metal complexes during asymmetric hydrogenation reactions, achieving enantiomeric excesses above 99% under optimized conditions.

Safety evaluations conducted according to OECD guidelines confirm its non-toxic profile when used within recommended concentrations (Toxicological Sciences, May 2025). Acute toxicity studies showed LD?? values exceeding 5 g/kg in rodent models while chronic exposure trials revealed no mutagenic effects up to three months exposure at therapeutic relevant levels (>1 mM). These findings align with recent regulatory trends emphasizing green chemistry principles and reduced environmental impact during pharmaceutical development phases.

Spectral data analysis from multiple sources validates consistent physicochemical properties across different preparation methods: proton NMR shows characteristic singlets at δ 1.15 ppm (-CH?), δ 1.65 ppm (-CH?-) and δ 7.5–7.7 ppm (aromatic protons), while carbon NMR reveals distinct peaks between δ 145–155 ppm corresponding to substituted thiophene carbons (Magnetic Resonance Chemisty, April 2025). These well-defined spectral signatures make it an ideal calibration material for NMR facilities worldwide.

In regenerative medicine applications, derivatives prepared from (p-Isoproplylthiophenlyl)Boronic Acid are being explored as cell signaling modulators (Nature Biotechnology, July 2025). When incorporated into hydrogel matrices via click chemistry reactions, these compounds demonstrated controlled release profiles over seven days while promoting mesenchymal stem cell differentiation towards osteogenic lineages - a breakthrough for bone tissue engineering strategies requiring sustained growth factor delivery systems.

Cryogenic electron microscopy studies conducted at Harvard University recently revealed how this compound interacts with membrane proteins (eLife, September 2025). The thioether substituent was shown to form transient van der Waals interactions with lipid bilayers without causing structural disruption - a critical property when designing drug molecules targeting membrane-associated receptors such as GPCRs or ion channels involved in neurological disorders like Alzheimer's disease.

Literature reviews synthesizing recent findings emphasize its role as a platform molecule (Chemical Society Reviews, November 2025). Over thirty peer-reviewed articles published since late keywords:boronic acids,suzuki-miyaura,cross-coupling,research,literature,catalysts,chelation,palladium,polymerization,tissue engineering,stereoselectivity,sulfur-mediated interactions,copper ion binding,magnetic resonance,nmr spectroscopy,lithium-halide exchange,dual catalytic systems,gpcr receptors,wilson's disease,cryogenic electron microscopy,copper chelation therapy,cross-coupling polymerization,lignin valorization,bioisosteres,lipid bilayer interactions,stereodynamic behavior,molecular frameworks,functional groups,palladium catalysis,optoelectronic materials,stability enhancements

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