2-Chlorobenzimidazole → N-Methyl-N-(1-methyl-3-pyrrolidinyl)-1H-benzimidazol-2-amine

Participants

Reaction Conditions

Reaction Steps

A mixture of 2-chlorobenzimidazole (25 g, 0.165 mol) and 3-methylamino-1-methylpyrrolidine (72 g, 0.63 mol) was heated at 120° C. with an oil bath for 18 hr. After cooling, 500 ml of 2.5N NaOH solution was added and the mixture extracted twice with 100 ml portions of methylene chloride. The methylene chloride extracts were combined and washed successively with 2×100 ml portions of 2.5N NaOH solution and 3×100 ml portions of water. The methylene chloride solution was dried (Na2SO4) and concentrated to obtain 15 g of product (40% yield).

Provenance & Evidence