反应详情

A flask containing (E)-ethyl 3-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)but-2-enoate (C26) (1.80 g, 4.31 mmol) and palladium on carbon (10 wt %, 0.46 g, 0.43 mmol) in ethyl acetate (14.5 mL) was evacuated and backfilled with nitrogen, and then evacuated and placed under hydrogen by balloon (˜1 atm). The reaction was stirred at room temperature overnight, and then filtered through Celite® and concentrated to afford the title compound as a tan liquid (1.79 g, 98%): 1H NMR (400 MHz, CDCl3) δ 8.55 (s, 1H), 8.17-8.07 (m, 2H), 7.87-7.75 (m, 2H), 7.38 (d, J=9.1 Hz, 2H), 7.36-7.31 (m, 2H), 4.08 (qd, J=7.1, 0.8 Hz, 2H), 3.35 (dd, J=14.6, 7.2 Hz, 1H), 2.62 (qd, J=15.1, 7.6 Hz, 2H), 1.34 (d, J=7.0 Hz, 3H), 1.19 (t, J=7.1 Hz, 3H); 19F NMR (376 MHz, CDCl3) δ −58.03; ESIMS m/z 420 ([M+H]+).

1. customwas evacuated
2. customevacuated
3. filtrationfiltered through Celite®
4. concentrationconcentrated