反应详情

4-Chloroaniline (13.2 g, 103 mmol), 3′-chloro-3,6-dihydro-2H-1,2′-bipyridine-4-carboxylic acid (16.49 g, 69.1 mmol), 1-[3-(dimethylamino)propyl]-3-ethylcarbodiimide hydrochloride (26.5 g, 1.38 mmol) were combined in dichloromethane (150 mL) and stirred overnight at ambient temperature. The mixture was diluted with dichloromethane (200 mL), washed with water (400 mL), 400 mL brine, dried with sodium sulfate, filtered, and the filtrate was concentrated under reduced pressure. The residue was purified by chromatography on silica gel using hexane:ethyl acetate (7:3) to provide the title compound. 1H NMR (500 MHz, CDCl3) δ 8.20 (dd, 1H), 7.70 (dd, 1H), 7.62 (s(br) 1H), 7.54 (d, 2H), 7.30 (d, 2H), 6.92 (dd, 1H), 6.76 (m, 1H), 4.16 (dd, 2H), 3.64 (dd, 2H), 2.66 (m, 2H) MS (ESI) 349 (M+H)+.

1. washwashed with water (400 mL), 400 mL brine
2. dry with materialdried with sodium sulfate
3. filtrationfiltered
4. concentrationthe filtrate was concentrated under reduced pressure
5. customThe residue was purified by chromatography on silica gel