Pyrone

Pyrones or pyranones are a class of heterocyclic chemical compounds. They contain an unsaturated six-membered lactone ring, which has one oxygen atom and an adjacent ketone functional group.^[1] There are two isomers denoted as 2-pyrone and 4-pyrone. The 2-pyrone (or α-pyrone) structure is found in nature as part of the coumarin ring system. 4-Pyrone (or γ-pyrone) is found in some natural chemical compounds such as chromone, maltol and kojic acid.

2-Pyrone

4-Pyrone

See also

• Furanone, which has one fewer carbon atom in the ring.
• Pyridones, which contain a nitrogen in place of one of the oxygens

References

1. Streitwieser, Andrew Jr.; Heathcock, Clayton H. (1985). Introduction to Organic Chemistry (Third ed.). pp. 1038–1040. ISBN 978-0-02-418140-4.