HCID 18680985, compound → HCID 18681138, compound

Participants

Reaction Conditions

Reaction Steps

A solution of 1 mol of titanium tetrachloride in 0.14 ml of dichloromethane and 0.36 ml of triethylamine were added to a solution of 200 mg of 6-carbamoyl-1-(2-chlorobenzyl)-2-n-propylbenzimidazole in 4 ml of tetrahydrofuran at 0°C., and the mixture was stirred at 20° C. for 2 hours. The reaction mixture was separated with ethyl acetate and with water. The organic layer was washed with water, dried, and then concentrated under reduced pressure. The residue was developed and purified through column chromatography using a mixture of ethyl acetate and hexane (at a ratio of from 1:10 to 1:3), and was further recrystallized from a mixture of ethyl acetate and hexane to give 140 mg of 1-(2-chlorobenzyl)-6-cyano-2-n-propylbenzimidazole (87).

Provenance & Evidence