Concise Access to 1,2-Pyrrole-Annulated Benzazepines through a Brønsted Acid Catalyzed Redox-Neutral Domino Reaction.

A Brønsted acid catalyzed redox-annulated cascade reaction between 2-arylpyrroles and 2-(pyrrolidin-1-yl)-, 2-(piperidin-1-yl), or 2-morpholinobenzaldehydes has been developed. This dehydration/1,5-hydride shift/cyclization sequence results in the construction of two new C(sp2)-C(sp3) bonds, providing structurally diverse 1,2-pyrrole-annulated benzazepines in yields of 25-65 %. [ABSTRACT FROM AUTHOR]