Dimethylformamide → 4-chloro-1-(tetrahydro-pyran-2-yl)-1H-benzoimidazole-5-carbonitrile

Participants

Reaction Conditions

Reaction Steps

A solution of 130 (26 g, 0.082 mol) in dry DMF (550 mL) was degassed for 10 min. To the solution was added sequentially Pd2(dba)3 (1.5 g, 0.00164 mol), dppf (1.8 g, 0.00328 mol) and Zn(CN)2 (9.19 g, 0.0657 mol). After degassing for 15 min the resulting solution was heated to 110° C. for 6 h. After the reaction was complete, the reaction mixture was filtered through a Celite® pad. The pad was washed well with EtOAc. The filtrate was washed with water and saturated brine solution. The organic phase was dried (Na2SO4), filtered and concentrated in vacuo to afford 15 g (70%) of 4-chloro-1-(tetrahydro-pyran-2-yl)-1H-benzoimidazole-5-carbonitrile (132) as a pale yellow solid.

Provenance & Evidence