Brominated derivatives of 4‐hydroxy‐ and 4‐methoxy‐6‐methyl‐2H‐pyran‐2‐ones

Twenty‐five different brominated derivatives of 4‐hydroxy‐6‐methyl‐2‐pyrone (triacetic acid lactone) and 3‐acetyl‐4‐hydroxy‐6‐methyl‐2‐pyrone (dehydroacetic acid) have been prepared. Fifteen derivatives have not been previously described and the preparations of a few known products have been improved. Bromination at C‐3, C‐5, methyl group at C‐6 and deacetylations at C‐3 have been the types of reactions used.