1-Hydroxybenzotriazole → (S)-N-{1-[3-(3-Chloro-4-cyanophenyl)-1H-pyrazol-1-yl]propan-2-yl}-1H-imidazole-4-carboxamide

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Reaction Steps

4-Imidazolecarboxylic acid (1.00 g, 8.9 mmol) was dissolved in dry DMF (35 ml). Dry 1-(3-dimethylaminopropyl)-3-ethylcarbodiimide hydrochloride (EDCI, 2.31 g, 12.0 mmol), HOBt (1.84 g, 12.0 mmol), and DIPEA (4.7 ml, 3.46 g, 26.8 mmol) were added at RT. After stirring for 15 min (S)-4-[1-(2-aminopropyl)-1H-pyrazol-3-yl]-2-chlorobenzonitrile of Example 34© (2.44 g, 9.4 mmol) in dry DMF (15 ml) was added to the solution at RT. Then the solution was stirred for 45 h. Water was added and the product was extracted into ethyl acetate. The organic phase was washed with brine and water, dried and evaporated. The crude product was purified by triturating in hot DCM. The product was filtered and washed with heptane. 1H NMR (400 MHz, DMSO-d6): 1.08 (3H, d), 4.30 (1H, distorted dd), 4.41 (2H, m), 6.95 (1H, d), 7.57 (1H, s), 7.75 (1H, d), 7.85 (1H, d), 8.01 (2H, m), 8.21 (1H, s), 8.30 (1H, d), 12.47 (1H, broad s).

Provenance & Evidence