IPEA (2.5 mL), 5-chloro-2-(4-chlorophenyl)pentanoic acid (430 mg) and BOPCl (0.44 g) were added to a suspension of (E)-3-[3-methoxy-4-(4-methylimidazol-1-yl)phenyl]acrylic acid hydrazide dihydrochloride (500 mg) in methylene chloride (15 mL) at room temperature, and the reaction solution was stirred at room temperature for 14 hours. Water was added to the reaction solution, followed by extraction with chloroform. The resulting extract was washed with a saturated sodium chloride solution, dried over magnesium sulfate and then concentrated under reduced pressure. A solution of the residue in phosphorus oxychloride (4 mL) was heated under reflux for five hours. The reaction solution was left to cool to room temperature and concentrated under reduced pressure. A saturated sodium bicarbonate solution was added to the resulting residue, followed by extraction with chloroform. The resulting extract was dried over magnesium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (carrier: Chromatorex NH; elution solvent: heptane-ethyl acetate system) to obtain 366 mg of the title compound. The property value of the compound is as follows.
