The polyfunctionalized enaminone ethyl [( Z )‐2‐(2,2‐dimethyl‐4,6‐dioxo‐1,3‐dioxan‐5‐ylidenemethyl)‐1‐methyl‐3‐oxo‐but‐1‐enylamino]acetate

The solid‐state structure of the title enaminone, C 15 H 17 N 1 O 7 , the C adduct obtained from the reaction of 4‐aminopent‐3‐en‐2‐one with methoxymethylene Meldrum's acid, has been investigated by X‐ray diffraction, and several structural features are different from the previously described structure of the corresponding N adduct. The carbonyl group of the enaminone moiety of the C adduct is not coplanar with the enamine fragment. One bifurcated intramolecular N—H⋯O hydrogen bond [2.688 (2) and 2.668 (2) Å] and two intermolecular C—H⋯O hydrogen bonds [3.339 (3) and 3.379 (3) Å] are observed. The structure packs in a linear fashion along the [100] direction.