[F-].C([N+](CCCC)(CCCC)CCCC)CCC.[N:19]1([C:25]2[C:33]3[C:28](=[CH:29][CH:30]=[CH:31][CH:32]=3)[N:27]([Si](C(C)C)(C(C)C)C(C)C)[CH:26]=2)[CH2:24][CH2:23][O:22][CH2:21][CH2:20]1>C1COCC1.O>[N:19]1([C:25]2[C:33]3[C:28](=[CH:29][CH:30]=[CH:31][CH:32]=3)[NH:27][CH:26]=2)[CH2:20][CH2:21][O:22][CH2:23][CH2:24]1Add 1N solution of tetrabutylammonium fluoride (0.70 mL, 0.70 mmol) to a solution of 3-Morpholin-4-yl-1-triisopropylsilanyl-1H-indole (0.20 g, 0.56 mmol) in THF (2.0 mL). Stir at room temperature for 2 h, dilute with water, and extract with EtOAc. Wash EtOAc with saturated NaHCO3, water, dry (Na2SO4), and concentrate under vacuum. Purify the residue by flash chromatography using 20 to 80% of EtOAc in hexanes to give the title compound (0.10 g 89%). MS (ES) 203.1 (M+1)+.
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