5-Methylisoxazole-4-carboxylic Acid

• CAT Number: R008727
• CAS Number: 42831-50-5
• Molecular Formula: C5H5NO3
• Molecular Weight: 127.10
• Purity: ≥95%
• Synonyms: 5-Methyl-4-isoxazolecarboxylic Acid
• Storage: Store at +4C
• IUPAC Name: 5-methyl-1,2-oxazole-4-carboxylic acid
• InChI: InChI=1S/C5H5NO3/c1-3-4(5(7)8)2-6-9-3/h2H,1H3,(H,7,8)
• InChIKey: VQBXUKGMJCPBMF-UHFFFAOYSA-N
• SMILES: CC1=C(C=NO1)C(=O)O

5-Methylisoxazole-4-carboxylic acid (Cat No.: R008727) is a heterocyclic organic compound featuring an isoxazole ring substituted with a methyl group at the 5-position and a carboxylic acid at the 4-position. This structure makes it a valuable building block in medicinal and synthetic organic chemistry. It is used as an intermediate in the synthesis of pharmaceuticals, agrochemicals, and bioactive molecules. The isoxazole ring offers metabolic stability, while the carboxylic acid provides a reactive handle for forming amides, esters, or other functional derivatives.