1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → (S)-5-acetyl-N-(1-(3-(3-chloro-4-cyanophenyl)-1H-pyrazol-1-yl)propan-2-yl)-1H-pyrazole-3-carboxamide

Participants

Reaction Steps

3-Acetyl-1H-pyrazole-5-carboxylic acid (0.59 g; 3.84 mmol) and DIPEA (1.0 ml; 5.75 mmol) were dissolved in 4 ml of dry DCM. Anhydrous HOBt (0.78 g; 5.75 mmol) and EDCI (1.10 g; 5.75 mmol) were added at RT. (S)-4-(1-(2-aminopropyl)-1H-pyrazol-3-yl)-2-chlorobenzonitrile (1.00 g; 3.84 mmol) was dissolved in 4 ml of DCM and the reaction was stirred for overnight at RT. 40 ml of DCM was added and organic layer washed with 3×15 ml of water. Combined water phases were washed with 2×20 ml of DCM. Both organic phases were dried over Na2SO4, filtered and evaporated to dryness. Both crude product fractions were combined and purified by CombiFlash (2% MeOH in DCM). Product fractions were combined and evaporated to give 497 mg of product. 1H-NMR (400 MHz; d6-DMSO): δ 1.16 (d, 3H, J=6.7 Hz), 2.49 (s, 3H), 4.31 (m, 2H), 4.46 (sept, 1H, J=6.7 Hz), 6.93 (d, 1H, J=2.4 Hz), 7.31 (s, 1H), 7.81 (d, 1H, J=2.4 Hz), 7.92 (d, 1H, J=7.9 Hz), 7.97 (d, 1H, J=8.1 Hz), 8.03 (d, 1H, J=1.3 Hz), 8.48 (d, 1H, J=8.5 Hz), 14.16 (s, 1H).

Provenance & Evidence