反应详情

温度

55 °C

[4-[5-[3-amino-6-[4-(dimethylcarbamoyl)phenyl]pyrazin-2-yl]-1,3,4-oxadiazol-2-yl]phenyl]methyl acetate (118 mg, 0.2445 mmol) was suspended in methanol (2 mL) and treated with NaOH (489.0 μL of 1 M, 0.4890 mmol). The resulting mixture was stirred at 55° C. for 1 h. The reaction mixture was cooled to room temperature and then neutralised with HCl (978.0 μL of 1 M, 0.9780 mmol), filtered and washed with acetonitrile. The resulting yellow powder was heated in acetonitrile (5 mL), cooled and filtered to give a pale yellow powder. This was purified by column chromatography on silica gel eluting with 5% MeOH/CH2Cl2 to give the product as a pale yellow powder (73 mg, 70%); 1H NMR (400 MHz, DMSO) d 2.98-3.02 (m, 6H), 4.64 (d, 2H), 5.44 (t, 1H), 7.54-7.62 (dd, 4H), 7.78 (br s, 2H), 8.12-8.18 (dd, 4H) and 8.98 (s, 1H) ppm; MS (ES+) 417.23

1. temperatureThe reaction mixture was cooled to room temperature
2. filtrationfiltered
3. washwashed with acetonitrile
4. temperatureThe resulting yellow powder was heated in acetonitrile (5 mL)
5. temperaturecooled
6. filtrationfiltered
7. customto give a pale yellow powder
8. customThis was purified by column chromatography on silica gel eluting with 5% MeOH/CH2Cl2