Ammonia → HCID 178478054, compound

Participants

Reaction Conditions

Reaction Steps

142.5 g (1 mol) of 4-chloro-o-phenylenediamine, 170.5 g (1 mol) of 4-chlorophenylacetic acid, and 190 g (1 mol) of p-toluene sulfonic acid monohydrate (hereinafter called PTS) were thoroughly blended and heated using a mantle heater while stirring. The temperature was raised to 200° C. in 30 minutes, then the mixture was heated at 200° to 220° C. for 3 hours until almost all steam was evaporated. The reaction mixture thus obtained was poured into aqueous ammonia and stirred to solidify. The solid was washed with water and dried to produce a purple powder. This powder was recrystallized with a solvent to obtain 0.5 g of white, needle-shaped crystals of 6-chloro-2-(4-chlorophenylmethyl)benzimidazole. The compound was dissolved in as much an amount of acetic acid as can dissolve this compound. The solution thus obtained was added to 100 ml of water containing 0.04 g of cupric chloride to obtain the composition of the present invention.

Provenance & Evidence