反应详情

2,3,4,5,6-Pentafluorophenyl 4-(4-bromo-2-fluoroanilino)-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxylate in THF was reacted with conc. NH3 solution as for example 37, step B. Recrystallisation (EtOAc/Hexane) yielded 4-(4-bromo-2-fluoroanilino)-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxamide (100%); m.p. (EtOAc/Hexane) 282-284° C. 1H NMR [400 MHz, (CD3)2SO] δ 10.39 (s, 1H), 8.35 (s, 1H), 7.89 (br s, 1H), 7.66 (dd, J=10.4, 1.7 Hz, 1H), 7.51-7.44 (br m, 2H), 7.42 (dd, J=8.5, 1.9 Hz, 1H), 5.55 (s, 1H), 3.38 (s, 3H). LCMS (ACPI−) 340 (100%), 338 (90%). Anal. Calcd for C13H11BrFN3O2: C, 45.9; H, 3.3; N, 12.4. Found C, 46.1; H, 3.2; N, 12.6.

1. customRecrystallisation (EtOAc/Hexane)