反应详情

To a suspension of 10% Pd on activated carbon (25 g) in ethanol (4L), under N2 protection, was added 1-cyclopentyloxy-2-methoxy-5-nitrobenzene (250 g, 1.054 mol). The reaction mixture was degassed under vacuum three times. The reaction mixture was stirred vigorously while hydrogen gas was allowed to flow over the reaction mixture. After 4 h the reaction was complete by TLC (5:1 hex:EA). The reaction mixture was filtered through a pad of celite and the celite was rinsed with additional ethanol. The solvent was removed in-vacuo to obtain 208.38 g (95% yield) of 3-cyclopentyloxy-4-methoxyaniline as a red liquid. 1H NMR (CDCl3) δ 6.85 (d. J=8.4 Hz, 1H), 6.29 (s, 1H), 6.19 (dd, J=2.8, 8.4, 1H), 4.69 (p, J=4.4 Hz, 1H), 3.75 (s, 3H), 3.44 (bs, 2H),1.90-1.81 (m, 6H), 1.61-1.55 (m, 2H).

1. customThe reaction mixture was degassed under vacuum three times
2. filtrationThe reaction mixture was filtered through a pad of celite
3. washthe celite was rinsed with additional ethanol
4. customThe solvent was removed in-vacuo