HCID 13603311, Verbindung → HCID 13603309, Verbindung
Reaktionsgleichung
CN1C2C=C3C(=O)COC3=CC=2CC1=O.[C:16]1([N:22]2[C:30]3[CH:29]=[C:28]4[C:31](=[O:34])[CH2:32][O:33][C:27]4=[CH:26][C:25]=3[CH2:24][C:23]2=[O:35])C=CC=C[CH:17]=1.C(N1C2C=C3C(=O)COC3=CC=2CC1=O)CC.C(N1C2C=C3C(=O)COC3=CC=2CC1=O)(C)C>>[CH2:16]([N:22]1[C:30]2[CH:29]=[C:28]3[C:31](=[O:34])[CH2:32][O:33][C:27]3=[CH:26][C:25]=2[CH2:24][C:23]1=[O:35])[CH3:17]Komponenten
5
Versuchsvorschrift
Starting with the requisite 1-substituted-5-hydroxyoxindole and following the procedures of Preparation B, 5-methyl-3,6-dioxo-2,3,6,7-tetrahydro-furo[2,3-f]indole, 5-phenyl-3,6-dioxo-2,3,6,7-tetrahydro-furo[2,3-f]indole, 5-n-propyl-3,6-dioxo-2,3,6,7-tetrahydro-furo[2,3-f]indole and 5-i-propyl-3,6-dioxo-2,3,6,7-tetrahydro-furo[2,3-f]indole are prepared.