Highly Efficient Synthesis of Polysubstituted 2-Aminopyrroles via a Multicomponent Domino Reaction

A highly efficient approach to polysubstituted 2-amino­pyrroles containing a coumarin derivative unit at the 5-position of the pyrrole ring was developed via a novel multicomponent domino reaction of glyoxal monohydrate derivatives, anilines, coumarin derivatives, and malononitrile. This transformation proceeded via an α-amino­ketone as the key intermediate.