We presented a cesium carbonate promoted cascade reaction of N-tosyl-2-(2-bromophenylacetyl)pyrroles with DMF to synthesize dihydropyrrolizino[3,2-b]indol-10-ones. The transformation involved three successive bond formations without the aid of an exogenous transition metal catalyst or ligand.
![Graphical abstract: Cesium carbonate promoted cascade reaction involving DMF as a reactant for the synthesis of dihydropyrrolizino[3,2-b]indol-10-ones](http://hg.y866.cn/compound/lib/scimg/usr/1/C7QO00771J.jpg)
