反应详情

To a solution of Intermediate 1 (55 mg, 0.26 mmol) in DCM (3 mL) was added 2-chloro-3-(trifluoromethyl)benzoic acid (60 mg, 0.26 mmol) followed by EDCI (75 mg, 0.39 mmol), HOBt (28 mg, 0.21 mmol) and TEA (0.72 mL, 0.52 mmol). The mixture was stirred overnight and then loaded directly on a column. Chromatography on SiO2 eluting with EtOAc/Hex afforded the desired product as a colorless foam (80 mg, 73%). MS (ESI) mass calcd. C21H15ClF3N3O, 417.09. m/z found 418.2 [M+H]+. 1H NMR (500 MHz, CDCl3): 9.16-9.03 (m, 1H), 7.82-7.77 (m, 1H), 7.65-7.46 (m, 7H), 5.16-5.02 (m, 1H), 4.61-4.42 (m, 1H), 4.09-3.97 (m, 1H), 3.52-3.38 (m, 1H), 3.11-2.83 (m, 2H).