反应详情

To a solution of 2-aminonicotinic acid (91.1 g, 8.0 mmol), triethylamine (2.7 mL, 19.1 mmol) and acetone/H2O (3:1, 100 mL) was added 1-benzothiophene-2-carbonyl chloride (2.04 g, 10.4 mmol) at 0° C. The resulting solution was allowed to warm to rt and stir overnight. The volatile solvent was removed under reduced pressure and the aqueous solution was acidified with HCl (conc.). The resulting precipitate was filtered and then washed with EtOAc and dried under reduced pressure to afford the product. (1.2 g, 52%). NMR (DMSO): 11.7(1H, broad), 8.60(1H, m); 8.36(1H, s); 8.25(1H, d); 8.07(1H, d); 8.02(1H, d); 7.51(2H, m); 7.36(1H, m).

1. customThe volatile solvent was removed under reduced pressure
2. filtrationThe resulting precipitate was filtered
3. washwashed with EtOAc
4. customdried under reduced pressure
5. customto afford the product