反应详情

To a stirred solution of 6-chloro-2-fluoropurine (0.4 g, 2.3 mmol) in n-BuOH (50 ml) under an argon atmosphere at 0° C., was added DIEA (2.5 ml, 14.7 mmol) followed by (3-methylpyridin-2-yl)methanamine (0.36 g, 2.95 mmol). The reaction mixture was stirred at this temperature for 1 h and then allowed to return to room temperature and stirred for 4 h, it was still seen incomplete, hence heated the reaction to 100° C. and left at that temperature for 8 h. The solvent was evaporated in vacuo and the residue was purified by gradient column chromatography on silica gel, eluted with CHCl3:MeOH (100:0→90:10), to afford the product as a white solid; Yield: 0.3 g (51%). δH (CDCl3, 500 MHz) 2.35 (3 H, s, CH3), 4.71 (3 H, m, NH and NHCH2), 7.24 (1 H, s, br, ArH), 7.63 (1 H, s, br, ArH), 8.28 (1 H, s, br, ArH), 8.38 (1 H, s, br, ArH); δC (CDCl3, 500 MHz) 161.03 (C), 158.49 (C), 154.77 (C), 152.16 (C), 144.86 (CH), 137.53 (CH), 137.14 (CH), 130.67 (C), 121.58 (CH), 118.73 (C), 42.87 (CH2), 18.16 (CH3); m/z 259.3 (M+H)

1. customto return to room temperature
2. stirringstirred for 4 h
3. temperaturehence heated
4. customthe reaction to 100° C.
5. waitleft at that temperature for 8 h
6. customThe solvent was evaporated in vacuo
7. customthe residue was purified by gradient column chromatography on silica gel
8. washeluted with CHCl3:MeOH (100:0→90:10)