反应详情

温度

50 °C

One g of 2,6-diacetylpyridine and 3.0 ml of 2-ethylaniline were added to a round-bottom flask with 30 ml of methanol. A stirbar and 5 drops of 97% formic acid were added, and the flask was sealed and the solution was stirred for 24 hours at 50° C. The flask was then cooled to room temperature and placed in a freezer at −30° C. After 1 day, yellow crystals had formed. The crystals were isolated by filtration and identified by 1H NMR as the desired product (1.25 g, 55.2%). 1H NMR (CDCl3): δ8.38(d, 2, Hpyr), 7.86(t, 1, Hpyr), 7.20(m, 4, Haryl), 7.07(t, 2, Haryl), 6.65(d, 2, Haryl), 2.49(q, 4, Hbenzyl), 2.35(s, 6, N—C—CH3), 1.14(t, 6, CH2CH3).

1. customthe flask was sealed
2. temperatureThe flask was then cooled to room temperature
3. customplaced in a freezer at −30° C
4. waitAfter 1 day
5. customyellow crystals had formed
6. customThe crystals were isolated by filtration