A Facile and Effective Procedure for Synthesis of Polyfunctionalized Bis (imidazolyl) Pyrrole/Imidazolyl Indole from Pyrrole/Indole with Arylglyoxals and N‐aryl amidines

Heterocyclic systems containing bis (imidazolyl) pyrrole or imidazolyl indole moieties were synthesized by heterocyclization of pyrrole or indole with arylglyoxal monohydrates and N‐aryl amidines in ethanol catalyzed by FeCl₃ at room temperature. The paper reports a facile, efficient, and environmentally friendly protocol for the synthesis of new products. Products were isolated by simple filtration, and their structures were established from their spectroscopic data.