反应详情

5-(methoxycarbonyl)pyridine-2-carboxylic acid (100 mg, 0.55 mmol) was dissolved in acetonitrile (1 mL). Triethylamine (0.230 mL, 1.66 mmol) and O-benzotriazol-1-yl-tetramethyluronium hexafluorophosphate (314 mg, 0.83 mmol) were added. The reaction mixture was stirred at rt for 5 min. 3,3,3-trifluoropropylamine hydrochloride (83 mg, 0.55 mmol) was added and the reaction mixture was stirred at ambient temperature for 2 h. The solvent was removed in vacuo and the crude was pardoned between ethyl acetate and 1M sodium hydroxide. The organic layer was dried over magnesium sulfate and concentrated in vacuo. The crude was purified by column chromatography using a gradient of ethyl acetate in heptane yielded 38 mg (25%) of the title compound as a white solid; 1H NMR (400 MHz, DMSO-d6) δ ppm 9.17 (t, 1 H), 9.11 (d, 1 H), 8.48 (dd, 1 H), 8.18 (d, 1 H), 3.92 (s, 3 H), 3.53-3.60 (m, 2 H), 2.54-2.66 (m, 2 H); MS (ESI) m/z 277[M+H+], m/z 275[M−H+];

1. stirringthe reaction mixture was stirred at ambient temperature for 2 h
2. customThe solvent was removed in vacuo
3. dry with materialThe organic layer was dried over magnesium sulfate
4. concentrationconcentrated in vacuo
5. customThe crude was purified by column chromatography