反应详情

温度

80 °C

A mixture of 3-(3′-(ethylsulfonyl)-4-methyl-3-nitro-5-(trifluoromethyl)biphenyl-2-yl)-2-fluoro-5-methylpyridine (6.4 g, 13.3 mmol), iron (3.7 g, 66.3 mmol), HOAc, (32 mL), and H2O (11 mL) was heated at 80° C. for 2 h. After completion the reaction was concentrated in vacuo. The residue was reconstituted in dichloromethane (100 mL), filtered, and rinsed with dichloromethane (3×30 mL). The organic phase was washed with sat. NaHCO3 (1×100 mL) and brine (1×50 mL), dried (MgSO4), filtered, and concentrated in vacuo. Purification by silica gel chromatography (1:1 hexanes/EtOAc) gave 5.0 g (83%) of the title compound as a tan solid. 1H NMR (400 MHz, DMSO-d6): δ 7.93 (s, 1H), 7.67-7.7.71 (m, 2H), 7.53 (t, 1H), 7.46-7.48 (m, 1H), 7.42 (s, 1H), 6.93 (s, 1H), 5.09 (s, 2H), 3.11 (q, 2H), 2.27 (s, 3H), 2.21 (s, 3H), 0.85 (t, 3H). MS (ES) [m+H] calc'd for C22H20F4N2O2S, 453; found 453.3.

1. concentrationAfter completion the reaction was concentrated in vacuo
2. filtrationfiltered
3. washrinsed with dichloromethane (3×30 mL)
4. washThe organic phase was washed with sat. NaHCO3 (1×100 mL) and brine (1×50 mL)
5. dry with materialdried (MgSO4)
6. filtrationfiltered
7. concentrationconcentrated in vacuo
8. customPurification by silica gel chromatography (1:1 hexanes/EtOAc)