Dimethylformamide → 5-[10-Chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridine-2-carbonitrile

Participants

Reaction Conditions

Reaction Steps

Under argon atmosphere a mixture of 5-[10-chloro-7-(1-ethylpropyl)-2,3,4,5-tetrahydro-1H-[1,3]diazepino[1,2-a]benzimidazol-1-yl]-4-methylpyridin-2-yl trifluoromethanesulfonate (Example 58; 285 mg, 0.537 mmol), zinc cyanide (94.5 mg, 0.805 mmol), tetrakis(triphenylphosphine)palladium(0) (62.1 mg, 0.0537 mmol) and N,N-dimethylformamide (2.7 mL) was stirred at 120° C. for 3 hr. The reaction mixture was diluted with ethyl acetate, washed with water and brine, dried over anhydrous sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash column chromatography on silica gel eluting with a 10-40% ethyl acetate/n-hexane gradient mixture to give the title compound as a solid (166 mg, 0.407 mmol, 76%). Analytically pure material was obtained by recrystallization from ethyl acetate/n-hexane.

Provenance & Evidence