反应详情

2,3,4,5,6-Pentafluorophenyl-4-(2-fluoro-4-iodoanilino)-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxylate (600 mg, 1.08 mmol) was dissolved in THF (15 mL) to which was added DIEA (697 mg, 5.40 mmol), followed by 2-aminoethanol (132 mg, 2.17 mmol). This mixture was stirred at R.T. for 2 h., then the reaction solvent removed under reduced pressure and the resulting white solid suspended in Et2O. The solid was collected by filtration, then recrystallised from EtOAc/MeOH to give 4-(2-fluoro-4-iodoanilino)-N-(2-hydroxyethyl)-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxamide (394 mg, 85%) as a white solid, m.p. (EtOAc/MeOH) 205-208° C. 1H NMR [(CD3)2SO, 400 MHz] δ 10.10 (s, 1H), 8.43 (br s, 1H), 8.28 (s, 1H), 7.72 (dd, J=10.2, 1.8 Hz, 1H), 7.56 (br d, J=8.5 Hz, 1H), 7.28 (t, J=8.5 Hz, 1H), 5.58 (s, 1H), 4.76 (br t, J=5.2 Hz, 1H), 3.50 (q, J=5.8 Hz, 2H), 3.36 (s, 3H), 3.32-3.26 (m, 2H). Anal. Calcd for C15H15FIN3O3: C, 41.8; H, 3.5; N, 9.8. Found: C, 4.19; H, 3.2; N, 9.7.

1. customthe reaction solvent removed under reduced pressure
2. filtrationThe solid was collected by filtration
3. customrecrystallised from EtOAc/MeOH