5-Phenyl-1,2,4-oxadiazole-3-carboxylic acid(CAS: 37937-62-5)

5-Phenyl-1,2,4-oxadiazole-3-carboxylic acid is a white crystalline solid with a molecular weight of approximately 183.22 g/mol. It is slightly soluble in water and soluble in common organic solvents. This compound is highly reactive due to the presence of the oxadiazole ring, which makes it a suitable precursor for various functional groups and derivatives. It is not flammable but can react with strong bases and acids.

5-Phenyl-1,2,4-oxadiazole-3-carboxylic acid is often synthesized via the reaction of 5-phenylisoxazole with carbon dioxide in the presence of a suitable solvent and catalyst. The reaction is typically carried out at elevated temperatures and pressures, leading to a high yield of the desired product with good selectivity. Common solvents include dimethylformamide (DMF), and common catalysts include potassium carbonate or sodium carbonate.

5-Phenyl-1,2,4-oxadiazole-3-carboxylic acid is used in a variety of industries, including pharmaceuticals, where it serves as a precursor for the synthesis of drugs and intermediates. It is also used in polymers for its thermal stability and in sensors for its ability to detect specific chemical species. Additionally, it has applications in semiconductor materials due to its unique electronic properties.

When handling 5-Phenyl-1,2,4-oxadiazole-3-carboxylic acid, it is important to wear appropriate personal protective equipment (PPE) such as gloves, goggles, and a lab coat. This compound should be handled in a well-ventilated area or a fume hood to minimize inhalation risks. Spills should be cleaned up immediately using appropriate absorbent materials and a spill kit. Always refer to the safety data sheet (SDS) for detailed information on storage, disposal, and emergency procedures.