[C:1]1([CH3:21])[CH:6]=[CH:5][C:4]([C:7]2[C:8]3[C:13]([CH:14]=[C:15]4[C:20]=2[CH:19]=[CH:18][CH:17]=[CH:16]4)=[CH:12][CH:11]=[CH:10][CH:9]=3)=[CH:3][CH:2]=1.C1C(=O)N([Br:29])C(=O)C1.O>C1COCC1>[Br:29][C:14]1[C:15]2[C:20]([C:7]([C:4]3[CH:3]=[CH:2][C:1]([CH3:21])=[CH:6][CH:5]=3)=[C:8]3[C:13]=1[CH:12]=[CH:11][CH:10]=[CH:9]3)=[CH:19][CH:18]=[CH:17][CH:16]=24 g (1 eq, 14.9 mmol) of 9-p-tolyl-anthracene, 5.3 g (2 eq, 29.8 mmol) of NBS were dissolved in 200 ml of THF in a 500-ml round-bottomed flask and stirred for 1 hour. 200 ml of water was added to the solution to obtain yellow crystals. The yellow crystals were filtered, dissolved in a small amount of toluene, and separated using column chromatography (silica and hexane) to obtain 4.6 g (89%) of yellow crystals.
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