反应详情

温度

50 °C

Intermediate 6 (2.5 g, 4.8 mmol) was dissolved in 8.0 mL of ethanol and treated with activated charcoal, Darco G-60 (1.25 g). The suspension was stirred at 50° C. for 20 min and then filtered to remove the Darco. To the filtrate was added 10% palladium on activated carbon (250 mg) and the suspension placed on a Parr shaker. The reaction was shaken for 10 h under 30 psi hydrogen gas. The reaction was filtered through celite and concentrated under vacuum to afford compound 1 as a brown gelatinous solid (1.9 g, 4.3 mmol, 91%). 1H NMR (300 MHz, DMSO-d6) δ 2.40-2.68 (m, 6H), 2.92-3.18 (m, 2H), 4.35-4.45 (m, 1H), 4.60-4.69 (m, 1H), 5.22-5.30 (m, 1H), 6.82 (s, 1H), 6.85 (s, 1H), 6.68-6.86 (m, 4H), 7.12-7.36 (m, 5H), 7.95 (d, 1H, J=1.4 Hz), 8.19 (s, 1H), 9.49 (br s, 1H). m/z: [M+H+] calcd for C25H29N3O4 436.2; found 436.4.

1. filtrationfiltered
2. customto remove the Darco
3. additionTo the filtrate was added 10% palladium on activated carbon (250 mg)
4. stirringThe reaction was shaken for 10 h under 30 psi hydrogen gas
5. filtrationThe reaction was filtered through celite
6. concentrationconcentrated under vacuum