反应详情

温度

-10 °C

The N1-(5-amino-4-methyl-2-pyridyl)acetamide (8.00 g, 48.4 mmol) obtained in (B) was dissolved in tetrafluoroboric acid (160 ml) and slowly added dropwise with an aqueous solution (40 ml) of sodium nitrite (3.51 g, 50.8 mmol) at −20° C. under nitrogen atmosphere. The reaction mixture was further stirred at −10° C. for 1 hour and added with diethyl ether (800 ml), and the deposited white solid was collected by filtration and washed with diethyl ether to obtain the title compound (14.7 g, quantitative).

1. filtrationthe deposited white solid was collected by filtration
2. washwashed with diethyl ether