C(NC(C)C)(C)C.C([Li])CCC.[F:13][C:14]1[CH:15]=[C:16]([CH:18]=[CH:19][CH:20]=1)[NH2:17].[CH3:21][Si:22](Cl)([CH2:24][CH2:25][Si:26](Cl)([CH3:28])[CH3:27])[CH3:23]>O1CCCC1>[F:13][C:14]1[CH:15]=[C:16]([N:17]2[Si:26]([CH3:28])([CH3:27])[CH2:25][CH2:24][Si:22]2([CH3:23])[CH3:21])[CH:18]=[CH:19][CH:20]=1A solution of freshly distilled diisopropylamine (22.9 mL) in dry tetrahydrofuran (175 mL) at −78° C. under N2 is treated with n-butyllithium (1.6M in hexanes, 109 mL) dropwise over 15 minutes, and the resulting mixture is stirred at −78° C. for 45 minutes and is then added over ten minutes via cannula to a solution of 3-fluoroaniline (8.00 mL) in dry tetrahydrofuran (166 mL) at −78° C. under N2. The resulting reaction mixture is stirred at −78° C. for 50 minutes and is then treated with a solution of 1,1,4,4-tetramethyl-1,4-dichlorodisilethylene (18.3 g) in dry tetrahydrofuran (85 mL). The mixture is allowed to slowly warm to ambient temperature over four hours with stirring and is then washed with water (2×200 mL) and saline (100 mL), dried over anhydrous sodium sulfate and concentrated under reduced pressure to give the title compound, NMR (CDCl3, 400 MHz) 7.12, 6.65, 6.58, 0.86, 0.24δ.
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