Overview
2-Hydroxypyridine (2-pyridone) is an aromatic heterocyclic compound with both hydroxyl and pyridine functional groups. It exists in equilibrium with its tautomeric form, 2-pyridone, making it valuable in organic synthesis and coordination chemistry. The compound is primarily synthesized via the oxidation of 2-aminopyridine or through cyclization reactions. Its dual reactivity (acidic OH and basic N) allows diverse applications in pharmaceuticals, where it serves as a building block for antibiotics, antivirals, and other bioactive molecules.
Physical and Chemical Properties
As a crystalline solid, 2-hydroxypyridine exhibits weak acidity (pKa ~11.6) due to the hydroxyl group, while the pyridine nitrogen acts as a weak base. Its tautomeric equilibrium (keto-enol forms) is solvent-dependent, with the keto form (2-pyridone) predominating in polar solvents. The compound's solubility in water and organic solvents like ethanol facilitates its use in reactions. It forms stable complexes with metals (e.g., Cu, Zn), which are exploited in catalysis and material science. Thermal stability is moderate, with decomposition occurring above 280°C.
Main Applications
In pharmaceuticals, 2-hydroxypyridine is a key intermediate for drugs like cephalosporin antibiotics and HIV protease inhibitors. Its metal-chelating properties are utilized in agrochemicals to enhance pesticide efficacy. The compound also serves in polymer stabilization, dyes, and as a ligand in catalytic systems. Recent research explores its role in supramolecular chemistry and nanotechnology, particularly in designing metal-organic frameworks (MOFs).
Safety and Storage
2-Hydroxypyridine is classified as an irritant (H315, H319) and requires handling with gloves, goggles, and fume hoods. Prolonged exposure may cause skin or eye irritation; immediate washing with water is recommended. Store in tightly sealed containers under inert conditions to prevent moisture absorption and oxidation. Shelf life is typically 2-3 years when stored below 25°C. Dispose of waste according to local regulations for nitrogen-containing compounds.
B2B Procurement Guide
For bulk procurement, prioritize suppliers with documented quality control (e.g., HPLC analysis for purity ≥98%). Technical and reagent grades are available, with prices scaling inversely with quantity (e.g., ~$120/kg for 100kg orders). Confirm regulatory compliance (REACH, TSCA) and request safety data sheets (SDS). For pharmaceutical use, GMP-certified manufacturers are essential. Lead times vary; secure contracts with reliable logistics partners to ensure stable supply chains.
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