反应详情

5-Chloro-8-methoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amine (4; 100 mg, 0.50 mmol) was suspended in acetonitrile (5 mL) at room temperature and treated with 25% sodium methoxide in methanol (200 mg, 2 eq). The resulting slurry was stirred at room temperature for 1.5 hours and then filtered. The solids were washed with water and dried to afford the title compound as a chalk-colored solid (87 mg, 88%) that was identical in HPLC retention to authentic 5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-amine (5): mp 185-186° C.; 1H NMR (DMSO-d6) δ 7.48 (s, 1H), 6.38 (br s, 2H), 4.04 (s, 3H), 3.88 (s, 3H); EIMS m/z 195.

1. filtrationfiltered
2. washThe solids were washed with water
3. customdried