反应详情

Add sodium triacetoxyborohydride (0.1633 g, 0.7705 mmol) to a stirred solution of 6-[4-(3-oxo-propyl)-phenoxy]-nicotinamide (0.1341 g, 0.4962 mmol), aniline (0.047 mL, 0.5158 mmol), and 1,2-dichloroethane (7 mL). Stir the reaction for 18 h at room temperature under nitrogen. Pour the reaction mixture into 1 N sodium hydroxide (50 mL), extract with dichloromethane (3× 50 mL), dry the dichloromethane extracts over magnesium sulfate, filter, and concentrate on a rotary evaporator to give the crude product. The crude product is purified by flash chromatography on silica gel eluting with 0.6% concentrated ammonium hydroxide/6% ethanol/chloroform to yield 0.0142 g (8%) of 6-[4-(3-phenylamino-propyl)-phenoxy]-nicotinamide: mass spectrum (ion spray): m/z=348.1 (M+1); 1H NMR (CDCl3): 8.58 (d, 1H), 8.16 (dd, 1H), 7.26-7.1 (m, 7H), 7.10-7.04 (m, 2H), 6.97-6.94 (m, 1H), 6.79-6.51 (m, 2H), 3.19 (t, 2H), 2.76 (t, 2H), 2.04-1.97 (m, 3H).

1. customthe reaction for 18 h at room temperature under nitrogen
2. extractionextract with dichloromethane (3× 50 mL)
3. dry with materialdry the dichloromethane
4. filtrationfilter
5. concentrationconcentrate on a rotary evaporator
6. customto give the crude product
7. customThe crude product is purified by flash chromatography on silica gel eluting with 0.6% concentrated ammonium hydroxide/6% ethanol/chloroform