4-[(1E)-3-(Methyloxy)-3-oxo-1-propen-1-yl]-1-naphthalenecarboxylic acid → 4-[3-(Methyloxy)-3-oxopropyl]-1-naphthalenecarboxylic acid

Participants

Reaction Steps

4-[(1E)-3-(Methyloxy)-3-oxo-1-propen-1-yl]-1-naphthalenecarboxylic acid (for example as prepared for Intermediate 5) (1.73 g, 5.09 mmol) is hydrogenated over palladium on carbon (10 wt %, 350 mg) in ethanol (50 ml) for 4 h. The catalyst is removed by filtration through Celite, and the mixture hydrogenated again with fresh catalyst (350 mg) overnight. The mixture is filtered through Celite and concentrated to afford the title compound.

Provenance & Evidence