4-Pyrone (ó-pyrone or pyran-4-one) is an unsaturated cyclic chemical compound with the molecular formula C<sub>5</sub>H<sub>4</sub>O<sub>2</sub>.It is isomeric with 2-pyrone.
4-Pyrone is prepared via the thermal decarboxylation of chelidonic acid.
4-Pyrone and its derivatives react with amines in protic solvents to form 4-Pyridones.
4-Pyrone forms the central core of several natural chemical compounds, including maltol, meconic acid, kojic acid, and of the important class of the flavones.