10 g (27.7 mmol) of 3-(anthracen-9-yl)-5-bromobenzaldehyde and 3.6 g (33.2 mmol) of 2-aminophenol were dissolved in 100 ml of acetic acid, and then agitated at room temperature for 30 minutes. Next, 14.7 g (33.2 mmol) of lead (IV) acetate was added thereto. The resulting mixture was agitated at 50° C. for 1 hour. Then, water was poured therein. The resulting product was treated with ethyl acetate to perform extraction, and then the solvent was removed under a reduced pressure. The extract was separated through a column and dried, obtaining 4.5 g (Y=33%) of a white solid.
