[CH:1]([C:7]1[NH:8][C:9]2[C:14]([CH:15]=1)=[CH:13][CH:12]=[CH:11][CH:10]=2)=[CH:2][CH2:3][CH2:4][CH2:5][CH3:6].[OH-].[K+].[O:18]1[C:23](=[O:24])[CH2:22][CH2:21][CH2:20][C:19]1=[O:25].[Cl-].[NH4+]>CS(C)=O.C(OCC)(=O)C>[CH:1]([C:7]1[N:8]([C:23](=[O:24])[CH2:22][CH2:21][CH2:20][C:19]([OH:25])=[O:18])[C:9]2[C:14]([CH:15]=1)=[CH:13][CH:12]=[CH:11][CH:10]=2)=[CH:2][CH2:3][CH2:4][CH2:5][CH3:6]To a solution of 2-hex-1-enyl-1H-indole in DMSO was added KOH at RT and this was stirred for 30 minutes. Dihydro-pyran-2,6-dione was added to the reaction mixture and stirred for 3 hours. The reaction was treated with saturated ammonium chloride and ethyl acetate. The product was purified by column chromatography.
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