p-Toluenesulfonic acid monohydrate → 5-bromo-2-neopentyl-1-(2-(trifluoromethoxy)ethyl)-1H-benzo[d]imidazole

Participants

Reaction Conditions

Reaction Steps

A mixture of N-(5-bromo-2-[2-(trifluoromethoxy)ethyl]amino]phenyl)-3,3-dimethylbutanamide (step C, 728 mg, 1.83 mmol) and p-toluenesulfonic acid monohydrate (350 mg, 1.83 mmol) in toluene (20 mL) was stirred at 120° C. for 8 h. Then, the mixture was allowed to cool to room temperature overnight to afford crystalline precipitates. The precipitates were collected by filtration, and dissolved in ethyl acetate and saturated sodium hydrogencarbonate aqueous solution. The organic layer was separated, washed with brine, dried over magnesium sulfate and concentrated under reduced pressure to afford the title compound (555 mg, 80%) as an amber solid.

Provenance & Evidence