4,4,4-Trifluorobutan-1-ol → US9777017, Example 60

Participants

Reaction Steps

To a mixture of (1R)-1-(1-piperidin-4-yl-1H-imidazo[4,5-d]thieno[3,2-b]pyridin-2-yl)ethanol (15.0 mg, 0.0496 mmol) and 4,4,4-trifluorobutanol (9.4 mg, 0.0744 mmol) in methylene chloride (0.3 mL) and N,N-dimethylformamide (0.2 mL) was added resin of tetramethylammonium triacetoxyborohydride (48.4 mg, 0.0992 mmol). The resulting mixture was stirred overnight. The mixture was filtered and concentrated then purified using RP-HPLC (XBridge C18 column, eluting with a gradient of acetonitrile/water containing 0.1% ammonium hydroxide, at flow rate of 30 mL/min) to give 7 mg (34%) of the desired product. LCMS calculated for C19H24F3N4OS (M+H)+: m/z=413.2. Found: 413.1. 1H NMR (300 MHz, CDCl3) δ 9.06 (s, 1H), 7.71-7.60 (m, 2H), 5.21 (s, 1H), 4.72-4.58 (m, 1H), 3.70-3.57 (m, 6H), 3.13 (d, J=9.8 Hz, 2H), 2.89-2.66 (m, 1H), 2.49 (t, J=6.9 Hz, 2H), 2.34-2.18 (m, 2H), 1.96 (s, 1H), 1.86-1.74 (m, 2H), 1.67 (s, 2H) ppm.

Provenance & Evidence