5-(1H-Indol-3-ylmethylidene)-2,2-dimethyl-1,3-dioxane-4,6-dione

Abstract

In the title compound, C15H13NO4, the conjugated double-bond system between the two rings adopts a cis configuration and there is an intramolecular indole–ketone C—H...O interaction. The indole N—H group forms an intermolecular hydrogen bond with a ketone O-atom acceptor, giving a chain structure along the ab direction. The O-heterocyclic ring adopts a boat conformation and makes a dihedral angle of 16.72 (6)° with the indole ring system.