Triethylamine → Methyl 4-chloro-2-[(2,4-dichlorophenyl)amino]-1-(3-hydroxypropyl)-1H-benzimidazole-7-carboxylate

Participants

Reaction Conditions

Reaction Steps

A mixture of the resulting thiourea (19.6 g), 1-ethyl-3-(3-dimethylaminopropyl)carbodiimide hydrochloride (8.12 g, 42.3 mmol), and triethylamine (6.5 mL) in tetrahydrofuran (200 mL) was stirred at 50° C. for 3 hr. The mixture was concentrated in vacuo, diluted with saturated aqueous sodium hydrogen carbonate, and extracted with ethyl acetate. The combined organic layer was washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo. The residue was washed with diisopropyl ether to give the title compound as a colorless powder (15.4 g, 35.9 mmol, 71% in 2 steps).

Provenance & Evidence