Sulfuric Acid → HCID 21163153, compound

Participants

Reaction Steps

7-Benzyloxy-2-diethoxymethyl-8-propyl-4H-1-benzopyran-4-one (5.0 g) was dissolved in glacial acetic acid (50 ml), and 10% sulphuric acid (25 ml) was added. Steam was passed through the solution for 30 minutes. On cooling the yellow crystals which formed were filtered off, washed with light petroleum (bp 40°-60°), chromatographed on silica gel with ether, and then crystallised from ether to give the aldehyde (1.67 g), mp 150°.

Provenance & Evidence