Dihydro-2H-pyran-3(4H)-one

• CAT Number: L011887
• CAS Number: 23462-75-1
• Molecular Formula: C5H8O2
• Molecular Weight: 100.12
• Purity: ≥95%
• IUPAC Name: oxan-3-one
• InChI: InChI=1S/C5H8O2/c6-5-2-1-3-7-4-5/h1-4H2
• InChIKey: URUUZIAJVSGYRC-UHFFFAOYSA-N
• SMILES: C1CC(=O)COC1

Dihydro-2H-pyran-3(4H)-one（Cat No.:L011887）, also known as 4-hydroxy-2-pyron or 4-hydroxy-6H-pyran-3-one, is a six-membered oxygen-containing heterocycle with a ketone at the 3-position and partial saturation at the 2,3-positions. This compound serves as a key structural motif in various natural products and biologically active molecules. Its enolizable ketone and reactive double bond make it useful in synthetic organic chemistry, particularly in cyclization, condensation, and nucleophilic addition reactions. It is also used as a building block in the synthesis of flavonoids, antibiotics, and chelating ligands, offering versatile applications in pharmaceutical and materials research.