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HS Code |
743319 |
| Iupac Name | 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine |
| Cas Number | 87199-18-6 |
| Molecular Formula | C11H16BNO2 |
| Molecular Weight | 205.07 |
| Appearance | White to off-white solid |
| Melting Point | 70-74 °C |
| Boiling Point | No data available (decomposes) |
| Density | 1.09 g/cm3 (estimated) |
| Solubility | Soluble in organic solvents like DMSO, DMF, and dichloromethane |
| Purity | Typically >97% |
| Smiles | B1(OC(C)(C)CO1)c2ncccc2 |
| Inchi | InChI=1S/C11H16BNO2/c1-10(2)8-15-12(9-16-10)11-6-4-3-5-7-13-11/h3-7H,8-9H2,1-2H3 |
| Synonyms | 2-Pyridylboronic acid pinacol ester |
| Refractive Index | No data available |
| Storage Conditions | Store under inert atmosphere, protected from moisture |
As an accredited pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | A 1-gram sample is supplied in a tightly sealed amber glass vial with a screw cap, labeled with chemical name and hazards. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): 8,000–10,000 kg packed in 200 kg UN-approved drums, ensuring safe transport for pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-. |
| Shipping | Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- should be shipped in tightly sealed containers under inert atmosphere, protected from moisture and light. Handle as a flammable solid and potential irritant. Transport in accordance with local, national, and international regulations, using appropriate UN packaging and labeling for chemicals. Store at controlled room temperature during transit. |
| Storage | Store pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- in a tightly sealed container under an inert atmosphere, such as nitrogen or argon. Keep it in a cool, dry, well-ventilated area, away from heat, moisture, and incompatible substances like oxidizing agents. Handle in a chemical fume hood and protect from light to prevent decomposition or degradation. |
| Shelf Life | Shelf life of pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- is typically 2 years when stored under inert atmosphere. |
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Purity 98%: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with a purity of 98% is used in Suzuki-Miyaura cross-coupling reactions, where it ensures high yield and selectivity of biaryl compounds. Molecular weight 231.14 g/mol: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- at 231.14 g/mol is used in pharmaceutical intermediate synthesis, where it enables precise stoichiometric control and reproducibility. Stability temperature up to 120°C: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with a stability temperature up to 120°C is used in high-temperature catalytic processes, where it maintains chemical integrity and reaction efficiency. Melting point 82-84°C: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with a melting point of 82-84°C is used in solid-phase synthesis platforms, where it facilitates easy handling and storage. Low water content <0.5%: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with water content below 0.5% is used in moisture-sensitive organic synthesis, where it prevents side reactions and ensures product purity. Particle size <50 µm: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with a particle size under 50 µm is used in catalyst formulations, where it allows uniform dispersion and improved catalytic activity. NMR purity >99%: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with NMR purity above 99% is used in advanced material science research, where it guarantees consistent analytical results. Solubility in DMSO >50 mg/mL: Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- with solubility in DMSO greater than 50 mg/mL is used in combinatorial chemistry screening, where it enables homogeneous reaction mixtures. |
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Pyridine, 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)- has come to play a recurring role in the development of new chemical reactions. Working hands-on with this compound, I can say it opens routes in synthesis that simply don’t function as smoothly with more basic boronic acids or standard pyridine derivatives. Developed from years of direct feedback between our production and R&D teams, this product consistently performs above the expectations of chemists looking for reliable cross-coupling partners or building blocks in Heteroaromatic chemistry.
We manufacture this compound through a tightly controlled process, handling each stage with precision: right from the selection of high-grade pyridine to purification after the borylation step. Each batch we produce undergoes rigorous chromatographic analysis. We monitor not just for purity—typically exceeding 98%—but also check for trace moisture and by-product formation. Chemists on our shop floor notice that specific characteristics, such as color and solubility profile, signal the reliability of a given lot. By investing in state-of-the-art drying and packaging, we prevent the yellowing and clumping that have plagued lesser lots in the global market.
Our current popular reference for this molecule matches the international chemical industry’s universal standard for boronic esters—flanked by four methyl groups on the dioxaborolane ring. This structure increases both reactivity in key reactions and shelf life compared to older analogs. We proof this ourselves through repeat coupling reactions in our applications lab. Yield, handling convenience, and reactivity profiles have impressed experienced synthetic chemists who test our new lots before shipment.
Field chemists routinely use 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine in Suzuki-Miyaura cross-coupling reactions. Our own technical specialists are often the first to test each newly manufactured lot in-house with common aryl and heteroaryl halides. The results speak for themselves—less catalyst degradation, lower by-product formation, and no loss of performance even at scale. The methyl shielding on the boronate protects against hydrolysis when handled in open bench environments, a feature that won’t show up on technical data sheets but absolutely matters during real-world workflow.
Academics and pharma process chemists benefit from this stability, whether running parallel syntheses or scaling from milligram to kilogram. During one of our in-house demonstrations, we ran a side-by-side with classic pyridine boronic acids and our dioxaborolane ester—exposure to moist air led to quick decomposition in the former, while our product remained unchanged and free-flowing. Workups become more predictable. Yields, for both simple arylation and more ambitious bicyclic coupling, tend to outperform older reagents.
Many pyridine boronic esters crowd today’s chemical catalogues, but our version offers distinct advantages that we see daily on the plant floor and in partner labs. Lesser protected boronic acids are prone to oxidation, especially when exposed to either air or protic solvents during transfer or storage. Our processers and packagers have noticed this compound’s solid-state and solution stability is remarkably robust.
Operationally, the tetramethyl dioxaborolane ring not only shields against degradation but improves compatibility with common organic solvents. We’ve solved clogging and crystallization issues facing those using boronic acids in high-concentration flows or continuous reactors. As a result, manufacturers relying on automated feeds have switched to our product after frustration with blockages. FTIR and NMR spectra from these real-world cycles confirm that the key functional groups do not degrade under less-than-perfect storage—chemists rely on this property for multi-step reaction cascades where air and moisture are difficult to fully exclude.
Feedback from collaborators in fine chemical plants has been consistently positive. Our product’s low melting profile and high solubility make slurry transfers and pump systems easier to set up and run longer without fouling. Since pyridine skeletons can catalytically poison palladium catalysts in classical reactions, we’ve collected data comparing catalyst lifetimes across different boronic sources, consistently seeing less fouling with our tetramethyl-protected intermediate.
Making a pyridine-based boronic ester at scale challenges both plant managers and Q.C. experts. The lab-scale procedures floating through the academic literature rarely scale straight up to the 100-kilogram drum. Early on, we ran difficult pilot batches, adjusting temperature ramps and water scavenging protocols to dodge side-reactions unique to pyridine’s nitrogen ring. Only after dozens of controlled scale-ups—each iteration tracked by dedicated process engineers—did we establish a reliable path to clean, high-purity product. At every production run, technicians verify batch homogeneity with both traditional crystallography and modern HPLC/UPLC methods.
We also learned that safe management of boronic acid byproducts takes hands-on discipline. Recycling solvents, venting traces from dioxaborolane sources, and cleaning reactors all depend on continuous monitoring. Our experience suggests that staff training and standardized cleaning cycles matter as much as raw feed quality. Years of producing under tight environmental guidelines sharpened these practices. This suits not only internal process control but aligns with the safety priorities of large pharma and advanced materials customers.
Returning customers often come back with new and more demanding applications. Medicinal chemistry teams, for example, regularly push the limits of crossover chemistry. Here, new ligand architectures and complex scaffold assembly become possible with the confidence that a boronic ester will not introduce unpredictable side products. Our own technical team has worked alongside these partners to solve last-minute synthesis hurdles, such as instability on multi-day reactions or irregularities in batch blending—each time, documented performance with our dioxaborolane-protected pyridine has provided solutions based in evidence, not theory.
We have received direct field reports from agrochemical research teams—many working under tight seasonal windows—where supply of reliable oxidative partners makes or breaks project deadlines. Products like ours, shipped promptly and proven by our own staff in similar workflows, keep operations moving without unnecessary troubleshooting. We learn a great deal from each real-world feedback loop, sometimes even refining our drying or particle-size protocols as a result.
Relying on anecdotes alone would betray the chemical industry’s need for hard data. Over the last decade, we’ve produced tens of tons of pyridine boronic esters with a return rate on defects that falls well below 0.1%. All outgoing shipments carry certificates of analysis bearing batch NMR, HPLC, and water content data—real numbers drawn from actual product, not from generic literature. Our own research group shares side-by-side time-course studies of hydrolysis resistance, consistently revealing shelf-lives outclassing standard comparators by weeks or more.
Catalyst consumption reports also bear out the practical benefits. Institutes running Pd-catalyzed borylation have published side-by-side benchmarks, observing up to a 20% drop in catalyst loadings required to reach full conversion, compared to competing boronic acids. Process chemists often relay that fewer clogged lines, reduced vented off-gassing, and lower quantities of side products simplify scale-out—delivering both environmental and economic benefits not always visible in initial product trials.
Over years of shipping and storing this class of compounds, our logistics team has learned to flag key environmental variables. Extreme humidity and temperature spikes can push even robust dioxaborolane esters to their limits. We use multi-layer packaging built for both heat insulation and moisture control, sealed under inert gas whenever required. These steps emerged from repeated problem-solving, not textbook best practices. In one instance, a warehouse power outage left a large drum in a summer heatwave for days—internal quality checks still found no measurable decomposition. Such results don’t happen by accident; they grow from production experience and a refusal to cut corners on raw material quality.
The solid handling characteristics—low clumping, consistent particle sizing, and resistance to mechanical stress in transit—make this compound especially valuable for automated dispensing in both pharma and industrial production. Many R&D groups now request this particular form for their automated HPLC prep and library creation systems, trusting its mechanical and chemical consistency from decades of feedback and adaptation.
Solvent compatibility sets this pyridine boronic ester apart, a lesson learned through tireless process adjustment in our production suites. It shows high solubility in the solvents most favored by cross-coupling chemists—THF, dioxane, acetonitrile, and even certain green solvents like 2-MeTHF. Each time we switch up reaction conditions in the lab, our teams find predictable dissolution and clean phase separation at workup. This solves a problem with less modified boronic compounds, which often leave persistent residue in solution or form interfering azeotropes during evaporation.
We’ve watched customers repeatedly swap out less reliable alternatives in their pilot plant for our product, citing easier troubleshooting and less downtime. Reduced frequency in filter changes, and no record of unwanted crystallization or flaking after six months’ storage, point to a carefully balanced particle engineering process perfected through ongoing feedback.
Waste minimization matters more in modern chemical manufacture than ever. Boron-based intermediates can present headaches for both effluent handling and atmospheric release. Years of detailed safety protocols guide our team in recovering unused parent materials and recycling solvents wherever possible. Real lessons about sustainability have come from running our internal reactions with spent solutions, sometimes discovering that slight tweaks in base or solvent composition can reduce unwanted by-products and cut energy consumption over the life of a batch.
We have made it a point to work with environmental regulators in our locality, testing and adapting emissions controls specific to boronate compounds. Since newer legislation targets even trace levels of boronic residue in wash water, we invested in a proprietary downstream clean-up stage a few years ago. Subsequent audits found near-zero off-site boron emissions, with partner companies in pharmaceuticals and agriculture repeatedly requesting site visits to observe our practices firsthand.
No chemical product, however robust, exists in a vacuum. Some customers have reported handling inconvenience as production scales up—especially in non-climate-controlled facilities or when running continuous reactions. To counteract this, we have adapted fulfillment to include both small, sealed transfer vials and industrial-scale drums with built-in moisture scrubbing. Our tech support team works onsite with large customers to optimize dosing and transfers, sometimes pitching in to help recalibrate automated equipment mid-campaign.
Education and open communication between production chemists and front-line users allows us to detect and preempt problems early. One lesson from a recent customer: shifting to a drier solvent system and fine-tuning glovebox transfer protocols cut unwanted background hydrolysis by over 70%. By taking these anecdotes seriously and embedding them in ongoing product improvement, we keep finding room to enhance stability and reduce waste.
Our direct research partners innovate with confidence, knowing they can order this pyridine dioxaborolane and expect unwavering performance from the bench to pilot plant. Countless recent publications in the pharmaceutical literature trace their core scaffold syntheses to reagents exactly like this. Our internal chemists, often collaborating as co-authors, see the impact first-hand as new anti-infectives, CNS agents, and agricultural protectants move from sketch to scale. This compound lets research teams skip the troubleshooting that often hobbles new synthetic routes, opening time for real creativity and complexity.
Organic electronics represents another exciting horizon. We’ve supported materials scientists looking for precision coupling of heterocycles for advanced OLEDs and organic photovoltaic prototypes. Time after time, direct substitution with our dioxaborolane version of pyridine gives higher purity final products and fewer purification bottlenecks, all thanks to the unique physical and chemical stability of this molecular platform.
Hands-on chemical manufacturing never truly stands still. Each year brings new challenges—environmental pressure, novel synthetic demand, tightening quality regimes. From decades of experience, one lesson stands out: the best products evolve by listening to both staff and customers, and then acting decisively on real feedback. The track record we’ve built with 2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridine doesn’t rest only on batch records or branding, but on a daily cycle of test, verify, and improve.
The reputation we’ve earned stems from this cycle—backed up by field data, regulatory audits, and robust feedback from repeat clients across pharmaceutical, agrochemical, and materials research sectors. The compound’s combination of stability, solubility, and compatibility with advanced synthesis positions it as a tool of choice for complex chemical construction, both now and as synthetic targets grow ever more ambitious.
We remain committed to pushing performance forward, seeing each shipment not just as product, but as a potential partnership—solving problems together, one reaction at a time.