Hydrochloric Acid → 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)cyclopropanecarboxylic acid

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Reaction Steps

To ethyl 2-(4-(1-(4-(trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)-cyclopropane-carboxylate (C19) (1.50 g, 3.59 mmol) in methanol (24 mL) was added sodium hydroxide (2 N, 7.20 mL, 14.4 mmol) and stirred at room temperature for 4 hours. The reaction was acidified with hydrogen chloride (2 N) and the methanol was evaporated off under vacuum. The aqueous solution was extracted with ethyl acetate (2×), dried over anhydrous sodium sulfate, filtered, and concentrated to afford the title compound as a yellow oil (1.62 g, 98%): 1H NMR (400 MHz, CDCl3) δ 8.58 (s, 1H), 8.13-8.08 (m, 2H), 7.83-7.77 (m, 3H), 7.40 (t, J=5.9 Hz, 4H), 7.22 (d, J=8.3 Hz, 2H), 2.65 (ddd, J=6.7, 5.3, 2.8 Hz, 2H), 2.03-1.95 (m, 1H), 1.76-1.66 (m, 2H), 1.47 (ddd, J=8.4, 6.6, 4.7 Hz, 2H); 19F NMR (376 MHz, CDCl3) δ −58.03; ESIMS m/z 390 ([M+H]+).

Provenance & Evidence