Boron trifluoride etherate → US9611269, Example 32

Participants

Reaction Steps

Boron trifluoride etherate (0.078 mL, 0.62 mmol) was added to a solution of 5-{3-(cyanomethyl)-3-[4-(7-{[2-(trimethylsilyl)ethoxy]methyl}-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]azetidin-1-yl}-N-[(1S)-1-cyclopropyl-2,2,2-trifluoroethyl]pyrazine-2-carboxamide in acetonitrile (4.0 mL) at 0° C. under N2. The reaction mixture was stirred at room temperature for 3 h. LCMS (M+H)+: m/z=553.2. The mixture was cooled to 0° C., then water (1.6 mL) was added. After 30 min, 5.0 M ammonium hydroxide in water (0.38 mL) was added slowly at 0° C. over 5 min. Then the reaction mixture was stirred at room temperature overnight. The reaction mixture was worked up with saturated aqueous NaHCO3, and extracted with ethyl acetate (3×20 mL). The combined organic layers were washed with brine, dried over MgSO4, filtered and concentrated under reduced pressure. The residue was purified by flash chromatography on a silica gel column with methanol in dichloromethane (0-5%) to afford the desired product. LCMS (M+H)+: m/z=523.2. 1H NMR (400 MHz, DMSO-d6): δ 12.53 (br, 1H), 8.94 (s, 1H), 8.79 (d, J=9.3 Hz, 1H), 8.68 (s, 1H), 8.51 (d, J=1.4, 1H), 8.40 (s, 1H), 7.86 (d, J=1.4 Hz, 1H), 7.63 (dd, J=3.1, 2.3 Hz, 1H), 7.08 (dd, J=3.3, 1.4 Hz, 1H), 4.66 (d, J=9.9 Hz, 2H), 4.40 (d, J=10.0 Hz, 2H), 3.82 (m, 1H), 3.63 (s, 2H), 1.22 (m, 1H), 0.48 (m, 1H), 0.38 (m, 1H), 0.30 (m, 1H), 0.02 (m, 1H).

Provenance & Evidence