Triethylamine → 2-(chloromethyl)-1-(methylsulfonyl)-1h-benzimidazole

Participants

Reaction Steps

To a solution of 2-(chloromethyl)benzimidazole (80 g, 0.48 mol) and methanesulfonyl chloride (58.3 mL, 0.75 mol) in 0.5 L of methylene chloride, triethylamine (136 mL, 0.97 mol) was added dropwise under nitrogen. The resulting mixture was stirred at room temperature for 6 hours. The mixture was filtered and the filtrate was evaporated. The residue was triturated in methanol and filtered to afford 74.9 g of the title compound as a brown solid.

Provenance & Evidence