Example 79
To a stirred solution of 3-(chlorodifluoromethyl)-6-(6-(2,2,2-trifluoroethoxy)pyridin-3-yl)-[1,2,4]triazolo[4,3-a]pyrazine (190 mg, 0.50 mmol)) in MeCN (10.0 mL) was added Cs2CO3 (978 mg, 3.0 mmol) and ethanol (0.58 mL, 10 mmol) at room temperature and stirred for 3 hours. The reaction mixture was treated with water (15 mL) and extracted with ethyl acetate (2×20 mL). The organic layer was washed with brine (15 mL), dried over anhydrous Na2SO4 and concentrated. The crude compound was purified by preparative HPLC to afford a solid (10 mg, 0.025 mmol, 5.1% yield. Prep-HPLC method: Rt 9.35; Column: XBridge (150×19 mm), 5.0 μm; 0.1% TFA in water/acetonitrile; Flow Rate: 15.0 mL/min. HPLC: Rt 4.89 min, Column: XBridge C8 (50×4.6) mm, 3.5 μm Mobile phase: A: 0.1% TFA in water, B: 0.1% TFA in ACN; Flow Rate: 2.0 mL/min. LCMS: 390.0 (M+H), Rt 2.70 min, Column: Atlantis dC-18 (50×4.6 mm), 5 μm Mobile Phase: A: 0.1% HCOOH in water:ACN (95:5), B: ACN; Flow Rate: 1.5 mL/min 1H NMR (400 MHz, CDCl3): δ 9.54 (d, 1H), 8.74 (d, 1H), 8.48 (d, 1H), 8.26 (dd, 1H), 7.06 (d, 1H), 4.87 (q, 2H), 4.38 (q, 2H), 1.52 (t, 3H).
