反应详情

温度

45 °C

Ethyl 6′-{[(ethylamino)carbonyl]amino}-5″-fluoro-3,3′:4′,3″-terpyridine-5-carboxylate (Example 68, 0.19 g, 0.46 mmol) was added to a 25 mL round-bottomed flask with THF (3 mL) to give a white suspension. Lithium hydroxide (1.160 mL, 1.16 mmol) was added to the mixture, and the solution was stirred at 45° C. for 2 h. The solvent was removed under reduced pressure, and the resulting residue was diluted with water and adjusted to pH˜4 by 2N HCl. The precipitate that formed was collected by filtration, washed with water, and dried to give the title compound as a white solid (154 mg). MS (ESP): 382 (MH+) for C19H16FN5O3; NMR: 1.08 (t, 3H), 3.13-3.24 (m, 2H), 7.63 (s, 1H) 7.64-7.68 (m, 1H) 7.69-7.77 (m, 1H), 7.93 (t, 1H), 8.19 (t, 1H), 8.36 (s, 1H), 8.45 (d, 1H), 8.55 (d, 1H), 8.90 (d, 1H), 9.45 (s, 1H).

1. customto give a white suspension
2. customThe solvent was removed under reduced pressure
3. additionthe resulting residue was diluted with water
4. customThe precipitate that formed
5. filtrationwas collected by filtration
6. washwashed with water
7. customdried