Acetic Acid → HCID 53800728, compound

Participants

Reaction Steps

253 g (2.5 moles) of acetylacetone, 1,110 g (7.5 moles) of orthformic acid triethyl ester and 8 g of acetic anhydride are heated to ebullition in a flask with vigorous stirring. During the reaction, about 23 g of acetic acid is added and the ethanol formed is distilled off. After 2 to 3 hours the reaction is completed. The unreacted orthoformic acid triethyl ester is distilled out at reduced pressure (5 to 1 Torr) through the top of the column and fed back to the next batch. Following this, 355 g of ethoxymethylene acetylacetone is evaporated, separated from the residue through a simple distillation bridge at 0.1 to 0.3 Torr. The yield, referred to acetylacetone, was 91% of theory.

Provenance & Evidence