The First Approach to the Synthesis of 1-Unsubstituted 2-Arylindolizines by Intramolecular 1,5-Dipolar Cyclization of 2-(2-Arylethenyl)pyridinium Ylides in the Presence of Tetrakis(pyridine)cobalt (II) Dichromate
An NHC‐mediated synthesis of pyrrolo[2,1‐a]isoquinoline and indolizinederivatives with potential biological activity is reported (NHC=N‐heterocyclic carbene). The preliminary photophysical studies of such compounds reveal that they have potential application in the sensing of volatile organic compounds (VOCs).