反应详情

4-(2-Benzyloxy-naphthalen-1-yl)-oxazol-2-ylamine (12, 1.0 g) was dissolved in ethanol and then palladium, 10% on carbon (390 mg) was added. The mixture was stirred under 1 atmosphere of hydrogen for 48 hours. The mixture was filtered through a pad of hyflo and washed with industrial methylated spirits. The filtrate was concentrated under reduced pressure and the residue was purified by column chromatography to afford 1-(2-amino-oxazol-4-yl)-naphthalen-2-ol (22) (290 mg, 41%) as a glassy orange foam. 1H NMR (DMSO-D6): 6.6 (2H, br s), 6.85 (1H, s), 7.2 (1H, d, J=9.0 Hz), 7.25 (1H, m), 7.4 (1H, m), 7.75 (2H, m), 7.9 (1H, m), 9.9 (1H, br s). Mass Spectrum (m/z): 227 (M+H)+.

1. filtrationThe mixture was filtered through a pad of hyflo
2. washwashed with industrial methylated spirits
3. concentrationThe filtrate was concentrated under reduced pressure
4. customthe residue was purified by column chromatography