Hydrochloric Acid → HCID 58072334, compound

Participants

Reaction Steps

A solution of 3-[3-(dimethylamino)prop-2-enoyl]-1-[3-(trifluoromethyl)phenyl]pyridazin-4(1H)-one (675 mg, 2 mmol), cyclopropylmethylhydrazine hydrochloride (490 mg, 4 mmol), and Et3N (0.558 mL, 4 mmol) in MeOH (20 mL) was refluxed for 2 h. After cooling to room temperature, the reaction mixture was poured into 1 M HCl aqueous solution and extracted with AcOEt. The extract was washed with brine, dried over MgSO4, and concentrated under reduced pressure. The residue was purified by basic silica gel column chromatography eluting with AcOEt and recrystallized from hexane/AcOEt to give the title compound (315 mg, 44% yield) as a pale yellow solid: mp 155-157° C.; 1H NMR (300 MHz, CDCl3): δ ppm 0.35-0.44 (2H, m), 0.45-0.57 (2H, m), 1.24-1.40 (1H, m), 4.37 (2H, d, J=6.8 Hz), 6.76 (1H, d, J=7.9 Hz), 7.37 (1H, d, J=1.9 Hz), 7.61 (1H, d, J=1.9 Hz), 7.68-7.74 (2H, m), 7.78-7.83 (1H, m), 7.94 (1H, s), 8.28 (1H, d, J=7.9 Hz). Anal. Calcd for C18H15F3N4O: C, 60.00; H, 4.20; N, 15.55. Found: C, 60.07; H, 4.24; N, 15.56.

Provenance & Evidence