反应详情

2-(3-(Pyridin-2-yl)phenyl)benzo[d]oxazole-7-carboxamide (90 mg, 0.28 mmol) and platinum (IV) oxide monohydrate (45 mg) in methanol (20 mL) was purged with 20 atm of hydrogen at 50° C. for 24 h. Then the mixture was filtered and adjusted to pH=9. The solvent was removed in vacuum. The crude was purified by chromatography (petroleum ether/ethyl acetate=1:1). 30 mg of 2-(3-(piperidin-2-yl)phenyl)benzo[d]oxazole-7-carboxamide was obtained, yield: 33%. 1H-NMR (400 MHz, DMSO-d6) δ 1.35-1.38 (m, 1H), 1.45-1.47 (m, 2H), 1.58-1.60 (m, 1H), 1.75-1.82 (m, 2H); 2.68-2.69 (m, 1H); 3.08-3.10 (d, J=9.6 Hz, 1H); 3.66-3.69 (m, 1H); 7.48-7.50 (t, J=6.0 Hz, 1H), 7.55-7.58 (d, J=6.4 Hz, 1H), 7.63-7.64 (d, J=5.6 Hz, 1H); 7.79-7.81 (m, 1H); 7.86 (brs, 1H); 7.94 (brs, 1H); 7.95-7.97 (m, 1H); 8.16-8.18 (m, 1H); 8.302 (s, 1H); LC-MS (ESI) m/z: 322 (M+1)+.

1. filtrationThen the mixture was filtered
2. customThe solvent was removed in vacuum
3. customThe crude was purified by chromatography (petroleum ether/ethyl acetate=1:1)