2-Pyrone

2-Pyrone[1]
Names
IUPAC name
Pyran-2-one
Other names
α-Pyrone
2-Pyranone
2H-Pyran-2-one
Identifiers
504-31-4 N
ChEBI CHEBI:37965 YesY
ChemSpider 61462 YesY
Jmol interactive 3D Image
PubChem 68154
Properties
C5H4O2
Molar mass 96.08
Density 1.197 g/mL
Boiling point 102 to 103 °C (216 to 217 °F; 375 to 376 K) at 20 mmHg
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
N verify (what is YesYN ?)
Infobox references

2-Pyrone (α-pyrone or pyran-2-one) is an unsaturated cyclic chemical compound with the molecular formula C5H4O2. It is isomeric with 4-pyrone.

2-Pyrone is used in organic synthesis as a building block for more complex chemical structures because it may participate in a variety of cycloaddition reactions to form bicyclic lactones. For example, it readily undergoes Diels-Alder reactions with alkynes producing, upon loss of carbon dioxide, substituted benzenes.[2] The Gogte Synthesis (1938) is a method for the alkylation of certain pyrones with acid chlorides.

The most common natural products containing a 2-pyrone are the bufanolides and kavalactones. Oxovitisin A, a pyranoanthocyanin found in wine, also contains a 2-pyrone element.

See also

References

  1. 2H-Pyran-2-one at Sigma-Aldrich
  2. Woodard BT, Posner G H (1999). "Recent Advances in Diels-Alder Cycloadditions Using 2-Pyrones". Advances in Cycloaddition 5: 47–83.
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