2.2-Dimethyl-5-(N-methyl-N-methoxy-aminomethylene)-1,3-dioxane-4,6-dione

In the title compound, C9H13NO5, the N-methoxy group adopts a conformation almost at right angles to the least-squares mean plane through the other two nitrogen substituents, in a direction opposite to that of the axial methyl substituent on the ring of the Meldrum's acid (2,2-dimethyl-1,3-dioxane-4,6-dione) moiety. There is an indication, at the limits of precision, that delocalization of the N-atom lone pair into the Meldrum's acid ring may be favoured in the direction of one of the two carbonyl groups. The structure is otherwise very similar to that of previously reported 2,2-dimethyl-5( N,N-dimethylaminomethylene)-1,3-dioxane-4,6-dione [Blake et al. (1991). J. Chem. Soc. Perkin Trans. 2, pp. 2003 - 2010].