反应详情

10% Palladium on carbon (1.9 g, 50% wet) was added under argon to N-(1-ethyl-1H-pyrazol-3-yl)-3-{[(1S)-1-methyl-2-(methyloxy)ethyl]oxy}-5-[(phenylmethyl)oxy]benzamide (19.1 g, 46.7 mmol) in dry THF (100 mL) and ethanol (100 mL). The reaction mixture was degassed, placed under a hydrogen balloon and stirred for 16 hours. The mixture was filtered through diatomaceous earth and the filtrate was evaporated to give a brown oil. The residue was purified by column chromatography on silica, eluting with 40-65% ethyl acetate in hexanes, to give the desired product as a clear oil which crystallized on standing (11.35 g). 1H NMR δ (CDCl3): 1.21 (d, 6H), 1.38 (t, 3H), 3.32 (s, 3H), 3.39-3.51 (m, 3H), 3.98 (q, 2H), 4.44-4.51 (m, 1H), 6.54 (s, 1H), 6.72 (d, 1H), 6.92 (s, 2H), 7.26 (d, 1H), 8.18 (s, 1H), 8.85 (s, 1H); m/z 320 (M+H)+ 318 (M−H)−

1. customThe reaction mixture was degassed
2. filtrationThe mixture was filtered through diatomaceous earth
3. customthe filtrate was evaporated
4. customto give a brown oil
5. customThe residue was purified by column chromatography on silica
6. washeluting with 40-65% ethyl acetate in hexanes