反应详情

To a flask containing Pd/C (1.5 g, Degussa type E101) was added methanol/acetic acid (100 mL, 3:1). Benzyl 4-((dimethylamino)methyl)cyclohexylcarbamate (15.8 g, 54 mmol) in methanol/acetic acid (300 mL, 3:1) was added. A balloon of H2 was added and the reaction stirred at rt for 6 h. The reaction was filtered through celite, the filtrate concentrated, and azeotroped with toluene. The thick oil was dried under vacuum to give desired product (17.9 g, crude) as a waxy solid. 1H NMR (300 MHz, MeOD) δ 3.11-2.98 (m, 1H), 2.78 (d, J=7.0 Hz, 2H), 2.69 (s, 6H), 2.07 (br d, J=13.9 Hz, 4H), 2.02-1.86 (m, 2H), 1.92 (s, 6H), 1.79-1.67 (m, 1H), 1.53-1.35 (m, 2H), 1.20-1.05 (m, 2H).

1. additionA balloon of H2 was added
2. filtrationThe reaction was filtered through celite
3. concentrationthe filtrate concentrated
4. customazeotroped with toluene
5. customThe thick oil was dried under vacuum