反应详情

4-[(1E)-3-(Methyloxy)-3-oxo-1-propen-1-yl]-1-naphthalenecarboxylic acid (for example as prepared for Intermediate 5) (4 g, 5.09 mmol) in 500 mL ethanol was hydrogenated over palladium on carbon (10 wt %, 1 g) for about 2 h. The catalyst was removed by filtration through Celite, the solvent evaporated and the resultant solid left overnight under vacuum to afford the title compound (3.8 g). ES+ve m/z 258 (M+H)+.

1. customThe catalyst was removed by filtration through Celite
2. customthe solvent evaporated