反应详情

温度

25 °C

A mixture of 2-bromo-5-nitropyrazine (500 mg, 2.45 mmol) and ethanolamine (225 mg, 3.67 mmol) in methanol (15 mL) was stirred at 25° C. for 5 h. After such time, the reaction was concentrated in vacuo. Biotage chromatography (FLASH 40S, Silica, 20/80 hexanes/ethyl acetate to 97/3 ethyl acetate/methanol) afforded 2-(5-nitro-pyrazin-2-ylamino)-ethanol (375 mg, 83%) as a yellow solid: mp 157.5–159.8° C.; EI-HRMS m/e calcd for C6H8N4O3 (M+) 184.0596, found 184.0603.

1. concentrationAfter such time, the reaction was concentrated in vacuo