AlCl3 (49 mg) and PhNMe2 (148 mg) were added to a solution of the compound (69 mg) of Example 23 in CH2Cl2 (2.0 ml), and the mixture was stirred at room temperature for one hour. Then, AcOEt was added, and the mixture was washed with 1N hydrochloric acid and thereafter with saturated aqueous sodium chloride. The organic layer was dried (Na2SO4), filtered, and evaporated under reduced pressure to remove the solvent. Then, the resulting crude product was purified by column chromatography (OH SiO2, AcOEt/hexane=2/1) to give 54 mg of the titled compound (Compound 696) as a colorless powder.
