Acta Cryst. (2004). E60, o2479-o2481  [ doi:10.1107/S1600536804030211 ]

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

I. Vencato, S. Cunha, J. Ferrari, H. B. Napolitano and C. Lariucci

Abstract: The solid-state structure of the title enaminone, C₁₅H₁₇N₁O₇, 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-HO hydrogen bond [2.688 (2) and 2.668 (2) Å] and two intermolecular C-HO hydrogen bonds [3.339 (3) and 3.379 (3) Å] are observed. The structure packs in a linear fashion along the [100] direction.

Online 27 November 2004

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