反应详情

1-(4-(1-(4-(Trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)propan-2-one (CB57) (1.0 g, 2.8 mmol) and ammonium acetate (1.7 g, 22 mmol) were combined in dry methanol (22 mL) and stirred at room temperature while sodium cyanoborohydride (0.17 g, 2.7 mmol) was added in 3 equal portions over 30 minutes. The reaction was stirred overnight. The reaction was concentrated and partitioned between aqueous potassium carbonate and diethyl ether. The layers were separated, dried, filtered, and concentrated. Purification by reverse-phase flash column (C18) chromatography using 0-100% acetonitrile/water as eluent provided the title compound as a tan solid (1.0 g, 38%): mp 140-160° C.; 1H NMR (400 MHz, CDOD3) d 9.13 (s, 1H), 8.09 (d, J=8.0 Hz, 2H), 8.00 (d, J=9.0 Hz, 2H), 7.52 7.43 (m, 2H), 7.35 (d, J=8.0 Hz, 2H), 3.40-3.33 (m, 1H), 2.86 (t, J=6.7 Hz, 1H), 2.77 (dd, J=13.3, 7.3 Hz, 1H), 1.18 (d, J=6.2 Hz, 3H) (NH2 not observed); ESIMS m/z 363 ([M+H]+).

1. additionwas added in 3 equal portions over 30 minutes
2. concentrationThe reaction was concentrated
3. custompartitioned between aqueous potassium carbonate and diethyl ether
4. customThe layers were separated
5. customdried
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification by reverse-phase flash column (C18) chromatography