Overview
Hexylboronic acid is an organoboron compound with the formula C6H15BO2. It belongs to the class of alkylboronic acids, which are widely used in organic synthesis due to their reactivity in cross-coupling reactions. The compound is typically supplied as a white crystalline powder and is sensitive to air and moisture, requiring careful handling and storage. As a key reagent in the Suzuki-Miyaura reaction, hexylboronic acid enables the formation of carbon-carbon bonds, making it indispensable in the synthesis of complex organic molecules. Its applications span pharmaceuticals, agrochemicals, and materials science, where precise molecular construction is critical.
Physical and Chemical Properties
Hexylboronic acid exhibits a melting point range of 80-85°C and is soluble in polar organic solvents such as tetrahydrofuran (THF) and dimethylformamide (DMF). Its slight solubility in water necessitates the use of anhydrous conditions in most reactions. The compound’s boron center is electrophilic, reacting readily with nucleophiles in the presence of palladium catalysts. Storage stability is a critical consideration; exposure to moisture or oxygen can lead to degradation. Suppliers often provide the compound in sealed containers under inert gas to preserve its reactivity. Analytical techniques like NMR and HPLC are used to confirm purity, which typically exceeds 95% for commercial grades.
Main Applications
The primary use of hexylboronic acid is in Suzuki-Miyaura cross-coupling reactions, where it couples with aryl or vinyl halides to form substituted hydrocarbons. This reaction is a cornerstone of modern pharmaceutical synthesis, enabling the production of drug candidates with tailored properties. Beyond pharmaceuticals, the compound is employed in agrochemical research to create novel pesticides and herbicides. Its role in materials science includes the synthesis of liquid crystals and polymers with specialized functionalities. The versatility of hexylboronic acid underscores its importance in industrial and academic laboratories.
Safety and Storage
Hexylboronic acid is classified as an irritant, requiring proper personal protective equipment (PPE) such as gloves, goggles, and lab coats. Work should be conducted in a fume hood to minimize inhalation risks. Spills should be contained with inert absorbents and disposed of as hazardous waste. Long-term storage demands an inert atmosphere (e.g., nitrogen or argon) and moisture-free conditions. Commercially available desiccants or vacuum-sealed packaging are recommended. Shelf life can extend to several years when stored correctly, though periodic purity checks are advised for critical applications.
B2B Procurement Guide
When procuring hexylboronic acid, prioritize suppliers who provide certificates of analysis (COA) and material safety data sheets (MSDS). Key specifications include purity (≥95%), CAS number verification (16343-08-1), and moisture content (<1%). Bulk purchases often attract discounts, but confirm scalability with the supplier’s production capacity. Logistics should account for the compound’s sensitivity; shipments must be sealed and labeled for hazardous materials if applicable. Establish a relationship with suppliers who offer technical support, especially for custom synthesis or large-scale projects. Comparative pricing from multiple vendors ensures cost efficiency without compromising quality.
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