反应详情

To 1-[5-(ethyloxy)-2-methyl-4-nitrophenyl]-4-[2-(methylsulfonyl)ethyl]piperidine (33.1 g, 89.0 mmol) in EtOAc (800 mL) and MeOH (200 mL) was added platinum on carbon (sulfided) (17.5 g, 4.47 mmol). The mixture was stirred under H2 (1 atm.) over the weekend. The mixture was filtered through Celite®, washed with DCM, and rotovapped down. The resultant solid was triturated with diethyl ether to provide the title compound of Step G (27.3 g, 80 mmol, 90% yield). 1H NMR (400 MHz, DMSO-d6) δ 6.54 (s, 1H), 6.44 (s, 1H), 4.28 (s, 2H), 3.94 (q, J=6.9 Hz, 2H), 3.11-3.22 (m, 2H), 2.97 (s, 3H), 2.87 (d, J=11.5 Hz, 2H), 2.44-2.56 (m, 2H), 2.06 (s, 3H), 1.59-1.80 (m, 4H), 1.43 (ddd, J=14.2, 7.0, 3.5 Hz, 1H), 1.21-1.36 (m, 5H).

1. filtrationThe mixture was filtered through Celite®
2. washwashed with DCM
3. customThe resultant solid was triturated with diethyl ether