Dimethylformamide → HCID 57786078, compound

Participants

Reaction Steps

Under nitrogen atmosphere, to a solution of 5-{9-chloro-6-[1-(difluoromethoxy)-2,2,2-trifluoroethyl]-3,4-dihydropyrimido[1,2-a]benzimidazol-1 (2H)-yl}-6-methylpyridin-2-yl trifluoromethanesulfonate (209.5 mg, 0.352 mmol), zinc cyanide (62.0 mg, 0.528 mmol), tetrakis(triphenylphosphine)palladium (0) (40.7 mg, 0.0352 mmol) and N,N-dimethylformamide (1.5 mL) was stirred at 100° C. for 2 hrs. The reaction mixture was diluted with water and extracted with ethyl acetate (×3). The combined organic layer was washed with water (×2) and brine (×1), dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by silica gel column chromatography eluting with a 0-50% ethyl acetate/n-hexane gradient mixture. The resulting solid was recrystallized from ethyl acetate/n-hexane to give a title compound as a colorless powder (136.1 mg, 0.288 mmol, 82%).

Provenance & Evidence