Hydrochloric Acid → HCID 178462755, compound

Participants

Reaction Steps

Combined 6-(4-(4-cyano-2-methylphenyl)-5-hydroxy-1H-pyrazol-1-yl)nicotinic acid (0.524 g, 1.636 mmol) in THF (3 mL) and added DMSO (1 mL) and DMAP (3.00 mg, 0.025 mmol) followed by a dropwise addition of a solution of CDI (0.292 g, 1.80 mmol) in DMSO (1 mL). The resulting clear solution was stirred at ambient temperature for 45 minutes and an additional portion of CDI (73.0 mg, 0.450 mmol) was added. The mixture was stirred for a total of 2 hours and 1-ethylpiperazine (0.270 mL, 2.127 mmol) was added. The resulting mixture was stirred for 4.5 hours and then diluted with water (6 mL, dropwise), acidified to pH=7 with 6N aqueous hydrochloric acid, and then further diluted with water (4 mL) to give a solid. The solid was filtered and dried in vacuum to give the title compound (0.613 g, 90%). 1H NMR (400 MHz, DMSO-d6) δ ppm 1.06 (t, J=7.07 Hz, 3H) 2.43 (s, 3H) 2.53-2.63 (m, 4H) 3.57 (br. s., 6H) 7.61 (d, J=8.08 Hz, 1H) 7.67 (s, 1H) 7.90 (d, J=8.08 Hz, 1H) 8.02 (dd, J=8.59, 2.27 Hz, 1H) 8.06 (s, 1H) 8.42 (d, J=8.59 Hz, 1H) 8.52 (d, J=1.77 Hz, 1H); MS (M+H)+417.

Provenance & Evidence