SnCl₂-Catalyzed Selective Atom Economic Imino Diels–Alder Reaction: Synthesis of 2-(1<i>H</i>-Pyrrolo[2,3-<i>b</i>]pyridin-3-yl)quinolines

The synthesis of 2-(1<i>H</i>-pyrrolo­[2,3-<i>b</i>]­pyridin-3-yl)­quinolines by a SnCl₂-catalyzed multicomponent reaction has been described. The reaction proceeds chemo- and regioselectively in an atom-economic way, generating a library of 24 quinoline derivatives