Benzimidazole → (R)-1-(2-(1H-benzo[d]imidazol-1-yl)-4-chlorophenyl)-2,2,2-trifluoroethanol

Participants

Reaction Conditions

Reaction Steps

To a solution of (R)-1-(2-bromo-4-chlorophenyl)-2,2,2-trifluoroethanol (1 g, 3.5 mmol) and 1H-benzo[d]imidazole (408 mg, 3.5 mmol) in toluene (24 mL) was added sequentially, CuI (131 mg, 0.69 mmol), K2CO3 (1.19 g, 8.63 mmol), and (1R,2R)—N1,N2-dimethylcyclohexane-1,2-diamine (196 mg, 1.38 mmol). The reaction mixture was purged with N2 and then heated at 130° C. in a sealed tube for 12 h. Afterward, the reaction was cooled to RT. The solid was removed by filtration and the filtrate was concentrated and purified by flash column (EtOAc in hexane=0 to 50%) to afford —(R)-1-(2-(1H-benzo[d]imidazol-1-yl)-4-chlorophenyl)-2,2,2-trifluoroethanol as a white solid.

Provenance & Evidence