2,2-Dimethyl-5-(1-naphthylaminomethylene)-1,3-dioxane-4,6-dione

The benzyl ring of the title compound, C17H15NO4, is twisted away from the plane defined by five atoms of the dioxane ring by 34.83 (4)degrees . The dioxane ring exhibits a half-boat conformation, with the C atom between the dioxane O atoms 0.571 (8) angstrom out of the plane through the remainder of the ring. An intramolecular N-H center dot center dot center dot O hydrogen bond may contribute to the stabilization of the planar conformation of the molecule. In the crystal, inversion dimers linked by pairs of C-H center dot center dot center dot O bonds occur.