New synthesis of model dihydroazepine-fused indolo[2,3-c]quinolines.
In: Heterocycles, Jg. 60 (2003) ; Nr. 1, S. 73-87
Zeitschriftenaufsatz / Fach: Chemie
A synthetic route involving double Pictet-Spengler condensations at the indolic C-2 and C-4 positions of a 3-diaminophenylindole is described leading to a novel dihydroazepine-fused indoloquinoline system. Mass and NMR spectral data are in accordance with the assigned pentacyclic structures namely, 7,8-dihydro-1,12-iminobenzo[c]pyrido[4,3,2-ef]benzazepines, as confirmed by X-Ray measurements.