A PIDA mediated intramolecular oxidative C–N coupling and subsequent detosylative aromatization to afford indolo[2,3-b]quinoline derivatives has been developed. This tandem reaction provided an efficient method for the synthesis of valuable indolo[2,3-b]quinoline derivatives.
![Graphical abstract: PhI(OAc)2-mediated intramolecular oxidative C–N coupling and detosylative aromatization: an access to indolo[2,3-b]quinolines](http://hg.y866.cn/compound/lib/scimg/usr/1/D1RA01894A.jpg)