3,5-Dimethoxy-1-benzenecarbonyl isothiocyanate was prepared using commercially available 3,5-dimethoxy-1-benzenecarbonyl chloride (80 mg) as a starting compound according to the description of the literature. 3,4-Dimethoxy-1-benzenecarbonyl isothiocyanate was dissolved in ethanol (1 ml) to prepare a solution. 4-[(6,7-Dimethoxy-4-quinolyl)oxy]aniline (50 mg), toluene (5 ml), and ethanol (1 ml) were added to the solution, and the mixture was stirred at room temperature for 2 hr. The reaction solution was concentrated, and the residue was purified by chromatography on silica gel using chloroform/acetone for development to give the title compound (70 mg, yield 80%).
