Ethyl 6-(4-chlorophenyl)-2,4,6-trioxohexanoate → 6-(4-Chlorophenyl)-4-oxo-4H-pyran-2-carboxylic acid

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Reaction Steps

A solution of ethyl 6-(4-chlorophenyl)-2,4,6-trioxohexanoate (0.30 g) in dioxan (2 ml) and concentrated hydrochloric acid (2 ml) was heated on a steam bath for 2 hours. The pale solid which formed was recrystallised from ethanol to give the title product identical (mp, IR and NMR, and thin-layer chromatography) with the product described in Example 24.

Provenance & Evidence