Acetonitrile → 4,5-Dimethyl-6-[4-(5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-pyridazin-3-yl-acetonitrile

Participants

Reaction Conditions

Reaction Steps

3-Chloro-4,5-dimethyl-6-[4-(5-trifluoromethyl-pyridin-2-yl)-piperazin-1-yl]-pyridazine (1.0 g, 2.64 mmol), acetonitrile (0.225 mL, 4.22 mmol), and toluene (5 mL) are combined and cooled to 0° C. LiHMDS (8.4 mL, 1.0 M, 8.4 mmol) is added dropwise over 5 min. The reaction is stirred at 0° C. for 1 h, then warmed to room temperature and stirred an additional 16 h. The reaction is quenched by the addition of saturated aq. NH4Cl, and the organics are extracted with EtOAc. The combined organic layers are dried over MgSO4 and concentrated. The residue is purified by flash chromatography on silica gel (0-100% EtOAc in heptanes) to afford the title compound as an orange solid (500 mg, 50%).

Provenance & Evidence