Phosphorus oxychloride → 2-Chloro-7-(1-ethylpropyl)-4-(2-furyl)-1-methyl-1H-benzimidazole

Participants

Reaction Conditions

Reaction Steps

A mixture of 7-(1-ethylpropyl)-4-(2-furyl)-1-methyl-1,3-dihydro-2H-benzimidazole-2-one (79 mg, 0.278 mmol) in phosphorous oxychloride (0.78 ml, 8.33 mmol) was stirred at 120° C. for 2 h. The reaction was allowed to cool to room temperature and concentrated in vacuo. The residue was dissolved in ethyl acetate, washed with aqueous saturated sodium bicarbonate and brine. The organic layer was dried over magnesium sulfate, filtered and concentrated in vacuo. The residue was purified by chromatography on silica gel with a 1-30% ethyl acetate/n-hexane gradient mixture to give 44 mg (0.145 mmol, 52%) of the title compound.

Provenance & Evidence