反应详情

温度

0 °C

A solution of 4-fluoropicolinic acid (1.0 g, 6.4 mmol), HATU (2.9 g, 7.6 mmol), and N-methylmorpholine (0.84 mL, 7.6 mmol) in N,N-dimethylformamide (12 mL) was stirred at 0° C. for 30 minutes. Methyl 4-aminothiophene-2-carboxylate (990 mg, 7.0 mmol) was added, the reaction was stirred for 30 minutes at 0° C., then warmed to room temperature, and stirred for an additional 2 hours. The solvent was removed under reduced pressure, the residue was suspended in acetonitrile/H2O (1:1) and the solids were isolated by filtration, washed with water, acetonitrile, then dried to afford methyl 4-(4-fluoropicolinamido)thiophene-2-carboxylate as a white powder (1.0 g, 56% yield). M+1=281.1.

1. temperaturewarmed to room temperature
2. stirringstirred for an additional 2 hours
3. customThe solvent was removed under reduced pressure
4. customthe solids were isolated by filtration
5. washwashed with water, acetonitrile
6. customdried