[F:1][C:2]([F:24])([F:23])[C:3]1[CH:4]=[C:5]([C:13]2[CH:21]=[CH:20][CH:19]=[C:18]3[C:14]=2[CH:15]=[C:16]([CH3:22])[CH2:17]3)[CH:6]=[C:7]([C:9]([F:12])([F:11])[F:10])[CH:8]=1.[Li:25]CCCC>CCCCC>[F:1][C:2]([F:23])([F:24])[C:3]1[CH:4]=[C:5]([C:13]2[CH:21]=[CH:20][CH:19]=[C:18]3[C:14]=2[CH:15]=[C:16]([CH3:22])[CH-:17]3)[CH:6]=[C:7]([C:9]([F:11])([F:12])[F:10])[CH:8]=1.[Li+:25]4-[3′,5′-bis(trifluoromethyl)phenyl]-2-methylindene (2.2 g, 6.5 mmol) was dissolved in 50 mL of pentane. To this solution was added 2.6 mL of n-BuLi (2.5M in hexane) and the reaction was allowed to stir 4 hours at room temperature. A yellow-white-solid precipitated from solution and was collected by frit filtration and washed with additional pentane. Yield was 1.6 g (73%).
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