Transition metal free Brønsted acid mediated synthesis of biologically important pyrido[1,2-a]indole scaffolds through aza-Nazarov type cyclization of readily available diaryl(2-pyridyl)methanol using formic acid has been developed. This methodology has been successfully extended to synthesize atropisomers.
![Graphical abstract: An efficient synthesis of pyrido[1,2-a]indoles through aza-Nazarov type cyclization](/en/Image/Get?imageInfo.ImageType=GA&imageInfo.ImageIdentifier.ManuscriptID=C4CC08783F&imageInfo.ImageIdentifier.Year=2015)
I. Karthikeyan, D. Arunprasath and G. Sekar, Chem. Commun., 2015, 51, 1701 DOI: 10.1039/C4CC08783F
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