4-Pyrone
- 4H- pyran -4-one
- γ -pyrone
Light yellow solid
Fixed
1.190 g · cm -3 ( 25 ° C)
32-34 ° C
210-215 ° C
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4- pyranone is a chemical compound from the group of pyrones. It occurs as a basic structure of some chemical compounds such as maltol and coumarins.
Production and representation
4- pyranone can be obtained by cyclocondensation of the diacetal of the 3-keto -1 ,5- pentandialdyds under acidic conditions (sulfuric acid and ethanol).
General can be obtained by cyclocondensation of 1,3,5- tricarbonyl compounds 4- pyranones.
Properties
4- pyranone is a light yellow solid. Light exposure it converts to 2 -pyrone.