To a solution of 0.21 g of 3,5-dichloro-4-(3-aminopropyloxy)-1-(3,3-dichloro-2-propenyloxy)benzene and 0.07 g of triethylamine dissolved in 5 ml of dichloromethane was added dropwise a solution of 0.11 g of 4-chlorobenzoyl chloride dissolved in 5 ml of dichloromethane, while stirring under ice cooling. After stirring at room temperature for 6 hours, the reaction mixture was washed with water and then concentrated to give a residue. The residue was subjected to silica gel chromatography, which afforded 0.21 g of 3,5-dichloro-4-(3-(4-chlorobenzamido)propyloxy)-1-(3,3-dichloro-2-propenyloxy)benzene (71% yield), m.p., 95.1° C.
