Methanol → N-Benzyl-4-methyl-2-(2-oxo-1,2-dihydropyridine-4-carboxamido)thiazole-5-carboxamide

Participants

Reaction Steps

To a solution of N-benzyl-2-(2-methoxyisonicotinamido)-4-methylthiazole-5-carboxamide (0.26 g, 0.68 mmol) in anhydrous chloroform (15 mL) was added iodotrimethylsilane (1.37 g, 6.80 mmol) at 0° C. The mixture was refluxed for 16 hours and cooled down to ambient temperature. Methanol (3 mL) was added dropwise to quench the reaction. The solvent was removed in vacuo. The residue was dissolved in ethyl acetate (100 mL) and washed with saturated sodium bicarbonate solution (2×100 mL), and brine (150 mL). The organic layer was dried over anhydrous sodium sulfate, filtered, and the filtrate was concentrate in vacuo. The residue was recrystallized from ethyl acetate and methanol to yield a colorless solid in 55% yield (0.13 g); m.p. 290-292° C.; 1H NMR (DMSO-d6, 300 MHz) δ 12.74 (s, br, 2H), 8.63 (t, J=5.9 Hz, 1H), 7.48 (d, J=6.8 Hz, 1H), 7.35-7.17 (m, 5H), 6.95 (d, J=1.6 Hz, 1H), 6.66 (dd, J=1.6, 6.8 Hz, 1H), 4.37 (d, J=5.9 Hz, 2H), 2.49 (s, 3H); 13C NMR (DMSO-d6, 75 MHz) δ 165.5, 162.6, 163.1, 162.0, 144.1, 140.0, 136.8, 128.7, 127.6, 127.1, 120.3, 119.2, 103.3, 43.0, 17.0; MS (ES+) m/z 369.2 (M+1).

Provenance & Evidence