Ethyl cyanoacetate → HCID 90438206, compound

Participants

Reaction Steps

To 4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)benzaldehyde (3.0 g, 9.0 mmol) in ethanol (11.5 mL) was added ethyl 2-cyanoacetate (0.95 mL, 8.9 mmol) and pyrrolidine (0.97 mL, 12 mmol). A yellow precipitate formed immediately and additional ethanol (10 mL) was added. The reaction was stirred at room temperature for 18 hours and then concentrated onto Celite®. Purification by flash column chromatography using 0-100% ethyl acetate/B, where B=1:1 dichloromethane/hexanes as eluent afforded the title compound as a white solid (2.1 g, 50%): 1H NMR (400 MHz, CDCl3) δ 8.61 (s, 1H), 8.36-8.31 (m, 2H), 8.29 (s, 1H), 8.12 (d, J=8.4 Hz, 2H), 7.85-7.79 (m, 2H), 7.41 (d, J=8.3 Hz, 2H), 4.41 (q, J=7.1 Hz, 2H), 1.42 (t, J=7.1 Hz, 3H); 13C NMR (101 MHz, CDCl3) δ 162.46, 162.24, 154.18, 141.89, 135.36, 134.76, 132.41, 131.53, 127.22, 122.47, 121.33, 115.51, 103.28, 62.82, 14.19; ESIMS m/z 429 ([M+H]+).

Provenance & Evidence