C[Si]([N-][Si](C)(C)C)(C)C.[Na+].[Br:11][C:12]1[CH:20]=[C:19]2[C:15]([CH2:16][C:17](=[O:21])[NH:18]2)=[CH:14][CH:13]=1.Cl.Cl[CH2:24][CH2:25][N:26]([CH2:28][CH2:29]Cl)[CH3:27].O>O1CCCC1>[Br:11][C:12]1[CH:20]=[C:19]2[NH:18][C:17](=[O:21])[C:16]3([CH2:29][CH2:28][N:26]([CH3:27])[CH2:25][CH2:24]3)[C:15]2=[CH:14][CH:13]=1Sodium bis(trimethylsilyl)amide (1.0M in tetrahydrofuran, 9.40 mL, 9.40 mmol) was added dropwise to a stirred suspension of 6-bromoindolin-2-one (preparation 1, 0.40 g, 1.89 mmol) in tetrahydrofuran (4 mL) at −78° C. The mixture was stirred for 30 minutes, then 2-chloro-N-(2-chloroethyl)-N-methylethanamine hydrochloride (0.36 g, 1.89 mmol) was added and the mixture was warmed to room temperature. After stirring overnight, water was added to the reaction and the mixture was extracted with ethyl acetate. The organic layer was dried (MgSO4) and evaporated. Purification of the residue by reverse phase chromatography (0% CH3CN in H2O to 100% CH3CN in H2O) gave the title compound as a yellow oil (0.17 g, 31%).
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