Hydrochloric Acid → HCID 57182351, compound

Participants

Reaction Steps

A solution of 0.924 g of ethyl 4-nitro-3-phenylacetylaminobenzoate in 10 ml of N,N-dimethylformamide were added 0.166 g of 60% sodium hydride while being cooled with ice, and the mixture was stirred at room temperature for 1 hour. Methyl iodide (0.50 ml) was added thereto, and the resulting mixture was stirred at room temperature for 1 hour. The reaction solution was poured into cold 1-N hydrochloric acid, and the mixture was extracted twice with ethyl acetate. The organic layer was washed with 1-N hydrochloric acid and then with water, and was dried. The solvent was distilled off under reduced pressure. The residue was purified through silica-gel column chromatography (developing eluent: a mixture of ethyl acetate and hexane at a ratio of from 1:10 to 1:4) to obtain 0.510 g of ethyl 4-nitro-3-[N-(methyl)phenylacetylamino]benzoate. To 0.148 g of this compound were added 2 ml of ethanol, 1 ml of acetic acid and 0.240 g of reduced iron, and the mixture was refluxed for 2 hours. The solid material was separated through filtration. The filtrate was concentrated, and was then purified through preparative thin-layer silica-gel chromatography (eluent: a mixture of chloroform and ethyl acetate at a ratio of 2:1) to give 0.090 g of 2-benzyl-6-ethoxycarbonyl-1-methylbenzimidazole (115).

Provenance & Evidence