Sodium hydride → HCID 22609942, compound

Participants

Reaction Steps

Sodium hydride (60% dispersion in oil, 16 mg, 0.41 mmol) was added to a solution of (2-methyl-2H-1,2,4-triazol-3-yl)methanol (prepared using the conditions described in EP-A-421210) (38 mg, 0.33 mmol) in dry DMF (2 ml) at room temperature. After 1 h at room temperature a solution of 6-chloro-3-(2,4-difluorophenyl)-7-(pyrrolidin-1-yl)-1,2,4-triazolo[4,3-b]pyridazine (102 mg, 0.30 mmol) was added and the reaction stirred for 18 hours. The residue was partitioned between dichloromethane and water. The aqueous was further extracted with dichloromethane (2×100 ml). The combined extracts were dried (Na2SO4), filtered and evaporated. The residue was purified by chromatography on silica gel, eluting with 0-2% ethyl acetate-methanol to afford the title pyridazine (42 mg, 30%). 1H NMR (250 MHz, CDCl3) 1.73-1.78 (4H, m), 3.51-3.55 (4H, m), 3.93 (3H, s), 5.40 (2H, s), 6.65 (1H, s), 6.95-7.03 (2H, m), 7.92-7.94 (1H, m), 8.04 (1H, s), MS (ES+) 413 [MH]+.

Provenance & Evidence