反应详情

温度

0 °C

Tert-butyl 4-{5-[2-fluoro-4-(methylsulfonyl)phenyl]-1H-benzo[d]imidazol-2-yl}piperidine-1-carboxylate (85 mg, 0.17 mmol) dissolved in THF (15 ml) and cooled to 0° C. Sodium hydride (9 mg, 0.342 mmol) added to the above mixture and stirred at the same temperature for 30 mins. To this mixture methyl iodide (48 mg, 0.342 mmol) added at same temperature and stirred the reaction mixture at rt for 3 h. Reaction mixture diluted with ice and worked up (EtOAc/H2O). Crude was purified by column chromatography on 60-120 mesh silica gel using EtOAc:Petether (3:1) as eluent to afford the title compound (50 mg) as an orange solid. M.P.: 85-88° C. 1H-NMR (δ ppm, CDCl3, 400 MHz): 7.85-7.75 (m, 2H), 7.73-7.64 (m, 2H), 7.56-7.51 (m, 1H), 7.50-7.45 (m, 1H), 4.39-4.21 (m, 2H), 3.82 (s, 3H), 3.11 (s, 3H), 3.10-3.00 (m, 2H), 3.00-2.88 (m, 2H), 2.05-1.93 (m, 3H), 1.48 (s, 9H).

1. stirringstirred the reaction mixture at rt for 3 h
2. customReaction mixture
3. additiondiluted with ice
4. customCrude was purified by column chromatography on 60-120 mesh silica gel