Acenaphthene → HCID 20360648, compound

Participants

Reaction Steps

42 g (0.5 mol) of diketene were added dropwise to 77 g of acenaphthene (0.5 mol) in 300 mol of anhydrous hydrofluoric acid at -30° C while stirring. The temperature was maintained for 9 hours. The hydofluoric acid was distilled off under reduced pressure at a temperature of the still of -30° C, the residue was washed until it was free from acid and distilled under reduced pressure. 10 g of unreacted acenaphthene were recovered (87 % conversion). At a transition temperature of 150° -155° C under 0.4 torr 85 g (82 % of theory) of slightly yellowish 5-acetoacetyl-acenaphthene melting at 59° C were then obtained.

Provenance & Evidence