反应详情

温度

140 °C

2,3-Dihydroxypyridine (5 g) is suspended in ethylbromoacetate (20 ml) and the mixture heated in a sealed tube for 24 hours at 140° C. The tube is then cooled in solid CO2 and opened. The contents are subjected to rotary evaporation at 50° C. to yield a yellow solid. Recrystallisation of this solid from water yields 1-ethoxycarbonylmethyl-3-hydroxypyrid-2-one as white crystals (5.4 g), m.p. 141°-151° C.; νmax (nujol) 1645, 1720 cm-1 ; δ(d6DMSO), 1.0 (t, 3H), 4.0 (q, 2H), 4.55 (s, 2H), 5.95 (t, 1H), 6.6(d, 1H), 7.05 (d, 1H).

1. customThe contents are subjected to rotary evaporation at 50° C.
2. customto yield a yellow solid
3. customRecrystallisation of this solid from water