反应详情

Combine the product of example 321 (0.0421 g, 0.0998 mmol), 10% Pd—C (2 spatula tips), and methanol (2.0 mL). Bubble one balloon of hydrogen gas through solution then stir under ca. 1 atm. After 3.5 h, filter the reaction mixture through Celite®, concentrate, and purify by reverse-phase HPLC to provide 0.0129 g (39%) of the title compound as a white solid: mass spectrum (electrospray): m/z=298.1 (M+1); 1H NMR (methanol-d4): 8.86 (s br, 1H), 8.59 (dd, 1H, J=2.0, 8.8 Hz), 7.53 (d, 2H, J=8.3 Hz), 7.32 (d, 2H, J=7.8 Hz), 7.19 (d, 1H, J=8.8 Hz), 3.51 (d, 1H, J=8.3 Hz), 3.25-3.08 (m, 3H), 2.18-2.08 (m, 2H), 2.06-1.84 (m, 2H).

1. customBubble one balloon of hydrogen gas through solution
2. filtrationfilter the reaction mixture through Celite®
3. concentrationconcentrate
4. custompurify by reverse-phase HPLC