Benzimidazole → HCID 86589916, compound

Participants

Reaction Steps

To a solution of benzimidazole (10 g, 84.6 mmol) in dichloromethane (30 mL) is added dropwise tetrafluoroboric acid as its etherate (85%, HBF4 by volume, Aldrich Chemicals Co.) with stirring at 0C. The reaction mixture is diluted with diethylether (100 mL) to precipitate the title compound. The title compound is filtered, washed with ether and recrystallized from ether.

Provenance & Evidence