反应详情

温度

25 °C

To a solution of sodium (Z)-1,4-diethoxy-1,4-dioxobut-2-en-2-olate (55.0 g, 262 mmol) in H2O (500 mL) was added formimidamide acetate (27.3 g, 262 mmol) and NaOH (10.5 g). After addition, the resulting mixture was stirred at 25° C. for 16 h then concentrated and then acidified by added aqueous HCl (1N) until pH=1. The resulting solid was collected by filtration, washed with H2O and ether to give 6-hydroxypyrimidine-4-carboxylic acid (6.0 g, yield: 16.3%). 1H NMR (400 MHz, DMSO-d6) δ 12.89 (s, 1H), 8.24 (s, 1H), 6.83 (s, 1H).

1. additionAfter addition
2. concentrationthen concentrated
3. additionby added aqueous HCl (1N) until pH=1
4. filtrationThe resulting solid was collected by filtration
5. washwashed with H2O and ether