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3-Methylthiophene-2-Boronic Acid

    • Product Name 3-Methylthiophene-2-Boronic Acid
    • Alias 3-Methyl-2-thienylboronic acid
    • Einecs 416-960-7
    • Mininmum Order 1 g
    • Factory Site Tengfei Creation Center,55 Jiangjun Avenue, Jiangning District,Nanjing
    • Price Inquiry admin@sinochem-nanjing.com
    • Manufacturer Sinochem Nanjing Corporation
    • CONTACT NOW
    VTB
    Specifications

    HS Code

    607286

    Product Name 3-Methylthiophene-2-Boronic Acid
    Chemical Formula C5H7BO2S
    Molecular Weight 141.99 g/mol
    Cas Number 135861-73-1
    Appearance White to off-white solid
    Melting Point 110-115°C
    Purity Typically ≥ 97%
    Solubility Soluble in organic solvents (e.g., DMSO, methanol), sparingly soluble in water
    Storage Conditions Store at 2-8°C, protect from moisture
    Synonyms 3-Methyl-2-thiopheneboronic acid
    Smiles CC1=CSC(=C1)B(O)O
    Inchi Key LFTWTSKUZTXKAZ-UHFFFAOYSA-N

    As an accredited 3-Methylthiophene-2-Boronic Acid factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.

    Packing & Storage
    Packing Amber glass bottle labeled "3-Methylthiophene-2-Boronic Acid, 5 grams." Includes hazard symbols, lot number, CAS, and storage instructions.
    Shipping 3-Methylthiophene-2-Boronic Acid is shipped in tightly sealed, chemical-resistant containers to ensure stability and prevent moisture exposure. Packages comply with relevant hazardous materials regulations, including appropriate labeling and documentation. Typically, it is shipped at ambient temperature unless otherwise specified, with secondary containment for added safety during transit.
    Storage 3-Methylthiophene-2-Boronic Acid should be stored in a tightly sealed container, in a cool, dry, well-ventilated area, away from direct sunlight, heat, and incompatible substances such as oxidizers. Avoid moisture and prolonged exposure to air to prevent degradation. Store at room temperature or as specified by the manufacturer. Proper chemical storage labeling and compliant safety practices are essential.
    Application of 3-Methylthiophene-2-Boronic Acid

    Applications of 3-Methylthiophene-2-Boronic Acid in Industrial Manufacturing

    As a direct manufacturer of 3-Methylthiophene-2-Boronic Acid, we have deep expertise supporting advanced industrial production for the electronics, pharmaceutical, and specialty chemical sectors. Below, we detail focused application scenarios based on established industrial practices and customer use cases, emphasizing compliance, practical formulation, real-world process integration, and the specific finished products made in each sector.

    1. Organic Semiconductor Material Synthesis

    This boronic acid derivative is widely used in the synthesis of π-conjugated polymers for organic electronics and optoelectronic devices. Semiconductor manufacturers require stable, pure intermediates for constructing high-performance components such as organic field-effect transistors (OFETs) and organic photovoltaics (OPVs). The material's boronic acid group readily enters Suzuki–Miyaura cross-coupling, enabling the precise construction of thiophene-based conductive polymers.

    Industry compliance standards

    • Relevant IEC standards for organic electronic materials (e.g., IEC 62899-201)
    • RoHS Directive (2011/65/EU) for restriction of hazardous substances
    • REACH Regulation (EC) No 1907/2006 for chemical registration and safety
    • Internal analytical QC to JIS C61300-3 for device-compatible purity

    Typical usage ratio

    • Employed at 5–15 mol% within monomer feed for Suzuki coupling polymerizations, adjusted according to targeted polymer structure and molecular weight requirements

    Downstream process integration

    • Introduced during monomer mixture preparation, then undergoes Pd-catalyzed cross-coupling under inert atmosphere; subsequent polymer workup and purification performed before device fabrication

    Final product types

    • Semiconducting polymer films (used in OFETs)
    • Printable active layers for flexible solar cells (OPVs)
    • Organic light-emitting diode (OLED) device components

    2. Pharmaceutical Intermediate for API Synthesis

    Advanced pharmaceutical manufacturing leverages 3-Methylthiophene-2-Boronic Acid as a critical building block during the multi-step synthesis of small-molecule APIs, especially where precise thiophene incorporation is needed. This approach supports the creation of novel heterocyclic compounds found in kinase inhibitors and CNS drugs. The boronic acid functionality ensures compatibility with robust cross-coupling techniques while meeting trace metal and residual solvent limits in regulated pharmaceutical environments.

    Industry compliance standards

    • Good Manufacturing Practice (GMP) — ICH Q7 and EU GMP Part II
    • USP <823> and Ph. Eur. monographs for intermediates (when applicable)
    • ICH Q3D for elemental impurities in APIs
    • REACH compliance for raw material registration

    Typical usage ratio

    • Typically used at 1.2–1.6 equivalents relative to the target halide substrate during coupling steps; proportion adjusted based on yield optimization and cost management

    Downstream process integration

    • Charged during the cross-coupling stage (Suzuki–Miyaura or similar); followed by aqueous workup, chromatography purification, and crystallization to isolate the pure pharmaceutical intermediate

    Final product types

    • Thiophene-containing pharmaceutical intermediates
    • Kinase inhibitor core fragments
    • CNS-active heterocyclic compounds for further derivatization

    3. Agrochemical R&D and Active Ingredient Synthesis

    Chemical process engineers in the agrochemical sector incorporate this boronic acid derivative for synthesizing advanced herbicide and fungicide actives, particularly those requiring sulfur-containing heterocyclic moieties for selective biological activity. Its controlled reactivity supports iterative structure-activity studies while maintaining compliance with crop protection regulatory frameworks and minimizing process waste.

    Industry compliance standards

    • OECD Principles of Good Laboratory Practice (GLP) for R&D
    • EPA (US) and European Registration, Evaluation, Authorization, and Restriction of Chemicals (REACH) pesticide registration
    • ISO 9001:2015-certified process management
    • Compliance with FAO/WHO specifications for pesticide technical materials

    Typical usage ratio

    • Integrated at 0.8–2 equivalents based on active ingredient synthesis pathway, stoichiometry determined by structure optimization cycle or targeted analog screening

    Downstream process integration

    • Introduced at the core formation stage during C–C coupling to build thiophene motifs, followed by downstream derivatization, isolation, and formulation of the active compound

    Final product types

    • Intermediate for triazole-based fungicides
    • Building block for selective sulfonylurea herbicides
    • Key structure in novel insecticidal leads (for compound library synthesis)

    4. Functional Dye and Pigment Intermediate Manufacturing

    Industrial dye synthesis facilities utilize this compound as a precursor for high-performance functional dyes, especially those used in electronic displays and industrial coatings. The thiophene-based structure modifies chromophore properties, leading to tailored absorption and emission profiles vital for specialty applications, including NIR-absorbing materials and photostable pigments. Stringent control of byproducts and impurity profiles is mandated throughout the dye manufacturing process.

    Industry compliance standards

    • ISO 9001:2015 Quality Management Systems for pigment production
    • ETAD (Ecological and Toxicological Association of Dyes and Organic Pigments Manufacturers) guidelines
    • GHS (Globally Harmonized System) substance labelling protocols
    • REACH registration and safety dossier requirements for dye intermediates

    Typical usage ratio

    • Normally added at 2–12 mol% of the total chromophore precursor mixture, adjusted based on absorption wavelength targeting and color fastness demands

    Downstream process integration

    • Combined with diazonium salts or other chromophore agents at the condensation or coupling stage before post-synthesis refinement, filtration, and standardized blending

    Final product types

    • Near-infrared (NIR) absorptive dyes for barcode and laser marking
    • Visible and UV region specialty pigments for industrial polymer coatings
    • Electronic display colorants for OLED/LED applications
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    Certification & Compliance
    More Introduction

    Introducing 3-Methylthiophene-2-Boronic Acid: From Our Plant to Your Research Bench

    An Inside Look at the Craftsmanship Behind Our Boronic Acid

    Working at the plant, people often ask what sets one building block apart from another. Boronic acids cover a lot of ground in synthetic chemistry, but our 3-Methylthiophene-2-Boronic Acid stands out among the latest in thiophene-based organoboron compounds. This material supports advanced research, especially where regioselectivity and functional group versatility matter most. You see trends in the labs toward more sulfur-heterocycle-containing targets for pharmaceuticals, OLEDs, and agrochemicals. Our team saw a demand for a boronic acid with a clean methyl group at the three-position combined with oxidative stability and consistent reactivity in Suzuki-Miyaura cross-coupling.

    Building Reliable 3-Methylthiophene-2-Boronic Acid

    Consistency takes effort from raw material selection through to purification. In our line, precision means choosing high-grade 3-methylthiophene as a starting backbone and controlling each step for maximum batch consistency. Even minor impurities in the thiophene influence the downstream reaction yields during the borylation step. We’ve learned, through trial and error, that controlling water content at every stage makes or breaks boronate purity. Product stability relies on keeping hydrolysis in check, requiring not just dry glassware, but dry everything—solvents, gases, even the packaging at the end before it leaves the warehouse.

    A good boronic acid for synthetic work doesn’t clog glassware, doesn’t leave sticky residues, and won’t turn brown the second it’s exposed to air. Stabilizing the boron-carbon bond while retaining rapid reactivity means our barrels go through a double-purification sequence. Some producers take shortcuts at this point, crystallizing once and calling it a day. Our crystallization and wash routines remove those hard-to-see process impurities that later knock out yields for medicinal chemists. It’s the fine surface of the crystalline powder form—not too coarse, not floaty—that makes dispensing simple, accurate, and scalable from millimoles to multi-kilogram lots.

    In the Reactor and in Real-World Conditions

    Synthetic chemists, especially those working in scale-up or lead optimization, know that not all boronic acids behave the same. One key feature of 3-Methylthiophene-2-Boronic Acid lies in its unique combination: the electron-donating methyl group supports faster coupling with a range of aryl halides. Even in the presence of sterically crowded partners, the reactions perform predictably. Its chemical structure supports reactions that would otherwise call for higher catalyst loadings or longer reaction times.

    Unlike phenyl boronic acids, our thiophene boronic acid offers enhanced solubility under Suzuki conditions. In practice, that means users report fewer filter clogging incidents, cleaner extractions, and more freedom to experiment with combined polar or non-polar organic solvents. Among several batches produced last year, we kept a watchful eye on its shelf stability; tightly sealed, dry-stored, the boronic acid remained free-flowing, pale, and reactive well beyond twelve months, a direct reflection of our moisture- and oxygen-conscious packaging practices.

    A Matter of Purity, Reactivity, and Trust

    Every manufacturer claims purity, but only a handful put their product to the test under full reaction mimic conditions. Each of our lots undergoes coupling trials before approval, not only simple NMR analysis. We basis-test with representative aryl bromides and palladium catalysts under both high and low catalyst loadings. This focus helps us watch for trace contaminants or minor structural isomers that can hide in a batch and then surface as color changes or sluggish yields later.

    Comparing across thiophene boronic acids from outside sources, we don't see the same level of assurance. Some competitors ship with flash-off odor or with moisture almost immediately detectable by weight. We prioritize both pre-shipment drying and supplying material in re-sealable, airtight vessels. We’ve noticed from customer feedback that materials handled this way minimize user downtime, especially in climate-variable regions. Less worry about clumping and unwanted decomposition means uninterrupted chemistry, whether in early-stage research or late-stage process optimization.

    Learning from Every Batch

    The most valuable lessons came from scale-up runs with 3-Methylthiophene-2-Boronic Acid produced for specialized pharma partners. The difference between handy research-scale grams and robust multi-kilogram supply often comes down to micro-level control—a principle we’ve baked into our daily protocols. Track-and-trace on supply chains, pre-delivery stress-testing against simulated transport environments, and on-site stability monitoring all contribute.

    On several occasions, customers shared their project results, pointing to finished actives and intermediates that simply wouldn’t come together without pure, fast-reacting thiophene boronic acid. One example included the integration of this compound into a synthetic route for a prospective kinase inhibitor, relying on the methyl group’s electronic influence to steer selectivity and speed in palladium-catalyzed couplings. Our involvement didn’t end at the shipment; we worked as technical support partners, troubleshooting solvent and temperature tweaks to maximize the reaction’s throughput.

    Distinguishing Features Over Conventional Boronic Acids

    Much of the synthetic world relies on phenyl boronic acids and their derivatives. Adding a methyl group to the thiophene ring, as we do in this product, shifts both reactivity and selectivity, allowing pathways not possible with unsubstituted or simply aryl boronic acids. Routine use of phenyl boronic acid hits a wall in certain cross-coupling sequences. Direct analogs often suffer from lower reactivity or from side products generated via unwanted homocouplings or protodeboronation. In contrast, we’ve repeatedly seen our thiophene boronic acid support yields above 90 percent in many applications, thanks to its enhanced resistance to atmospheric moisture and tendency to form fewer byproducts.

    One overlooked advantage is in the handling. The crystalline consistency we maintain means neither static nor cake formation disrupts weighing operations. Labs moving to automation and parallel workups can dose the compound rapidly, with repeatable accuracy, unlike some competitors’ waxy or oily boronic acids, which tend to gum up dispensing heads and lead to cleanup downtime.

    Impact on Research, Development, and Industry

    Our direct relationships with chemical innovators, both in small start-ups and established industrial labs, have shown the practical impact of a stable, high-purity thiophene boronic acid. In pharmaceutical development, kinetics and selectivity drive resource allocation on every program. Delays caused by inconsistent inputs reverberate through whole teams. One development chemist relayed that switching to our 3-Methylthiophene-2-Boronic Acid shortened their optimization by two months, after failed attempts with less pure competitors’ material.

    Beyond pharmaceuticals, our product also finds use in the synthesis of advanced organic materials, especially those aiming for novel electronic or photoluminescent properties. The sulfur atom and methyl substituent support conjugated frameworks while shifting electronic properties in predictable ways, critical for organic electronics applications. Dyson sphere OLED researchers, for example, use our thiophene boronic acid for tuning emission wavelengths and charge mobility in prototype devices. The benefit comes from repeatable reactivity on multi-kilo campaigns, not just isolated research examples.

    Direct Access and Flexible Supply: Working With the Manufacturer

    Choosing to work with a factory team, instead of through a network of third parties, gives a straightforward experience that researchers appreciate. Every inquiry, whether for milligram trial packs or full-container load shipments, reaches technical managers who know the exact process history and laboratory results for each lot. This transparency heads off many common headaches, from ambiguity about batch specifications to uncertainty over storage or regulatory nuances.

    We operate a batch reservation system that matches customer timelines. If a project requires future-readiness, our made-to-stock approach supports call-off scheduling. Customers with unpredictable R&D programs avoid overbuying; we encourage early dialogue, since our production line can scale up or down based on lead time rather than minimum order pressure. Some nervous purchasers, burned by resellers’ unpredictable switching between suppliers, have moved to a sole source arrangement with us, enjoying not only supply chain security but also direct technical input to troubleshoot any unanticipated downstream issues.

    Environmental and Safety Considerations at Our Core

    Manufacturing boronic acids on a multi-ton scale has direct environmental stakes. Evaporative losses from solvents, energy usage during purification, and safe handling protocols come into routine discussion at our plant meetings. Our team invests in closed-loop solvent recovery and rigorous monitoring that reduces both emissions and consumption rates. Worker safety gets just as much attention. We run regular safety drills, invest in local extraction at potential dusting stations, and maintain strict moisture control systems to keep workspaces clean and safe.

    Dealing with a crew that understands both the chemistry and the practical risks changes the tone of daily operations. Instead of seeing returns from customer labs caused by clumped or off-color boronic acids, we track nearly flawless post-delivery satisfaction, which comes down to a careful blend of chemistry and attention to individual needs on the production line.

    How Feedback Shapes Every Product Run

    Direct conversations with end users have shifted the way we formulate our batches. Instead of standardized, one-size-fits-all material, we receive candid feedback about particle size, packaging stiffness, and even labeling legibility. It’s not uncommon for a pharma or electronics customer to call with a precise question about a previous lot, asking for process notes or detailed impurity profiles. We see each of these as opportunities, using the combined experience of the team to make minor adjustments in the next run.

    Rather than chasing lower costs by cutting purification corners, we commit resources to maintaining analytical capabilities that catch off-spec material before it ever leaves our site. Our QA team includes both chemists and process engineers, ensuring our boronic acids go through real-world suitability trials, not just standard analytic confirmation. Trust grows from these routines. Customers know their projects don’t get derailed by unreliable raw materials.

    Looking Ahead: Adapting to Tomorrow’s Chemistry Demands

    Future chemistry demands flexibility and performance from starting materials. In recent months, global supply chain disruptions reminded everyone of the pitfalls of depending on unvetted intermediaries. By keeping production, quality, and technical support under one roof, we eliminate much of the risk associated with low-visibility sourcing.

    Looking at recent research into next-generation pharmaceuticals and organic materials, the need for robust boronic acids like our 3-Methylthiophene-2-Boronic Acid will only grow. Changing environmental legislation on volatile organic compounds and waste borylation byproducts challenges every chemical maker. We keep an eye on these regulatory trends, regularly updating our operations to both comply and stay ahead. Our R&D team constantly investigates new purification methods that minimize solvent use while maximizing purity.

    Customers who have relied on us for years know we don’t chase short-term profits or outsource difficult steps. Instead, our focus on meticulous process control and continuous improvement lets us ship boronic acids with the repeatability and reliability that high-stakes research demands. Every flask, drum, and package we send out represents what can be accomplished when manufacturers and users work directly together, learning from every batch and every reaction.