The general procedure for the synthesis of 9-bromo-10-(2-naphthalenyl)anthracene from 9-(naphthalen-2-yl)anthracene was as follows: 9-(2-naphthalenyl)anthracene (2.7 g, 8.9 mmol) was suspended in anhydrous N,N-dimethylformamide (DMF, 50 mL). To this suspension was slowly added anhydrous DMF solution (6 mL) dissolved in N-bromosuccinimide (NBS, 1.7 g, 9.6 mmol, 1.1 equiv). The resulting mixture was stirred and reacted for 10 h at room temperature and then left to stand overnight. Upon completion of the reaction, the reaction mixture was diluted with deionized water (50 mL). The resulting yellowish solid product was separated by filtration and washed with methanol to give the final target compound 9-bromo-10-(2-naphthyl)anthracene (3.2 g, 94% yield). The structure of the product was confirmed by 1H-NMR (CDCl3, TMS) with chemical shifts δ: 7.2-7.7 (9H, m), 7.8-8.1 (4H, m), 8.62 (2H, d, J = 8 Hz).
