Sulfuric Acid → 4-Hydroxy-6-methyl-2-pyrone

Participants

Role	Name	HCID	Charge
Reactant	Sulfuric Acid	HCID 1118	—
Reactant	3-Acetyl-4-hydroxy-6-methyl-2H-pyran-2-one	HCID 54678494	—
Product	4-Hydroxy-6-methyl-2-pyrone	HCID 54675757	—

3-Acetyl-6-methyl-4-hydroxypyran-2-one may be deacylated by reaction with 90% sulphuric acid at 130° C. to give 6-methyl-4-hydroxy pyran-2-one;