反应详情

4-(2-Fluoro-4-iodoanilino)-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxylic acid and CDI were dissolved in anhydrous THF/DMF (5:1) and treated with 2-amino-1,3-propandiol as for example 34. After workup, the residue was further purified by flash chromatography on silica gel (5% MeOH/CH2Cl2—10% MeOH/CH2Cl2 gradient elution) to give 4-(2-fluoro-4-iodoanilino)-N-[2-hydroxy-1-(hydroxymethyl)ethyl]-1-methyl-6-oxo-1,6-dihydro-3-pyridinecarboxamide (34%) as a white solid; m.p. (EtOAc/Hexane) 93-98° C. (glue-liquid). 1H NMR [400 MHz, CH3OD] δ 8.22 (s, 1H), 7.61 (dd, J=9.9, 1.8 Hz, 1H), 7.58-7.54 (m, 1H), 7.21 (t, J=8.4, 1H), 5.78 (d, J=1.1 Hz, 1H), 4.12 (p, J=5.6 Hz, 1H), 3.72 (ddd, J=15.1, 11.2, 5.6 Hz, 4H), 3.51 (s, 3H). HRMS (FAB+) calcd for C16H18FIN3O4 462.0326 (M+), found 462.0323. HPLC 89.9% (254 nm).

1. customAfter workup, the residue was further purified by flash chromatography on silica gel (5% MeOH/CH2Cl2—10% MeOH/CH2Cl2 gradient elution)