[CH:1]1[C:14]2[C:13](=[O:15])[C:12](=[O:16])[C:11]3[C:6](=[CH:7][CH:8]=[CH:9][CH:10]=3)[C:5]=2[CH:4]=[CH:3][CH:2]=1.FC(F)(F)C(O)=O.[I:24]N1C(=O)CCC1=O>O>[I:24][C:2]1[CH:3]=[CH:4][C:5]2[C:6]3[C:11](=[CH:10][CH:9]=[CH:8][CH:7]=3)[C:12](=[O:16])[C:13](=[O:15])[C:14]=2[CH:1]=1Into a 200 mL volume eggplant-shaped flask, 10.0 g of 9,10-phenanthrenequinone, 54.8 g of trifluoroacetic acid, and 21.6 g of N-iodosuccinimide were added at room temperature, heated to 35° C., and then stirred for 36 hours in an argon atmosphere. The reaction mixture was poured into icy water. The solid precipitate was collected by filtration and recrystallized with tetrahydrofuran, thereby to give 12.1 g of 2-iodo-phenantrene-9,10-dione (yield 75%) as an orange-colored solid.
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