[H-].[Na+].[Br:3][C:4]1[NH:5][C:6]2[C:11]([C:12]=1[C:13]1[CH:18]=[CH:17][C:16]([O:19][CH3:20])=[CH:15][CH:14]=1)=[CH:10][CH:9]=[CH:8][CH:7]=2.O(C1C=CC(C(C2C=CC(OC#N)=CC=2)(C)C)=CC=1)[C:22]#[N:23].O>C1COCC1.[Cl-].[Na+].O>[Br:3][C:4]1[N:5]([C:22]#[N:23])[C:6]2[C:11]([C:12]=1[C:13]1[CH:18]=[CH:17][C:16]([O:19][CH3:20])=[CH:15][CH:14]=1)=[CH:10][CH:9]=[CH:8][CH:7]=2NaH (18.35 mg, 0.76 mmol) was stirred in dry THF (1 ml) at 0° C. and 2-bromo-3-(4-methoxyphenyl)-1H-indole (210 mg, 0.69 mmol) dissolved in dry THF (4.5 ml) was added dropwise. The mixture was stirred at 0° C. for 5 min and then 2,2-bis-(4-cyanatophenyl)propane (251 mg, 0.90 mmol) dissolved in dry THF (4.5 ml) was added dropwise. Water was added and this mixture was stirred for 30 min Brine was added and the aqueous mixture was extracted with DCM. The solvent was concentrated and the crude product was purified on silica (EtOAc/n-Heptane 1:4). 198 mg 2-bromo-3-(4-methoxyphenyl)-1H-indole-1-carbonitrile was obtained.
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