反应详情

温度

140 °C

To stirring acetamide (292 mg, 4.95 mmol) at 100° C. was added boron trifluoride etherate (16.0 μl, 0.130 mmol). The temperature was raised to 140° C. and a solution of 2-(4′-methyl-[1,1′-biphenyl]-4-yl)-2-oxoethyl 4-((N-(2-(tert-butoxy)-2-oxoethyl)-4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)benzamido)methyl)benzoate INT-38 (100 mg, 0.124 mmol) in DCM (1 mL) was added drop wise under a stream of N2. After 1 h, the reaction mixture was allowed to cool to room temperature and acetonitrile (2 mL) was added. The reaction mixture was stirred at room temperature for 2 h and the precipitate was collected by filtration and washed with acetonitrile (0.5 mL) and isohexanes (2 mL). The isolated precipitate was further re-slurried from DCM (2 mL) to afford 39 mg (43%) of 2-(4-(2-(4-methoxy-2-(trifluoromethyl)phenyl)acetamido)-N-(4-(4-(4′-methyl-[1,1′-biphenyl]-4-yl)oxazol-2-yl)benzyl)benzamido)acetic acid 360 as a white solid. LCMS-ESI (m/z) calculated for C42H34F3N3O6: 733; found 734 [M+H]+, tR=9.18 min (Method 9). 1H NMR (400 MHz, DMSO) δ 12.84 (s, 1H), 10.34 (s, 1H), 8.78 (s, 1H), 8.10-8.03 (m, 2H), 7.98-7.92 (m, 2H), 7.80-7.73 (m, 2H), 7.68-7.53 (m, 5H), 7.50-7.35 (m, 4H), 7.33-7.27 (d, J=7.8 Hz, 2H), 7.26-7.16 (m, 2H), 4.75 (s, 1H), 4.67 (s, 1H), 4.03 (m, 1H), 3.95 (s, 1H), 3.89-3.79 (m, 5H), 2.37 (s, 3H).

1. temperatureto cool to room temperature
2. filtrationthe precipitate was collected by filtration
3. washwashed with acetonitrile (0.5 mL) and isohexanes (2 mL)