Acta Cryst. (2002). E58, o553-o554  [ doi:10.1107/S1600536802006797 ]

Ethyl N-(3-oxobutanoyl)carbamate

M. C. Golden, R. J. McGill and N. E. Heimer

Abstract: The title compound, C₇H₁₁NO₄, is a useful precursor in the synthesis of substituted pyrimidine bases. It is prepared from diketene and urethane and can be isolated from benzene as colorless, transparent, plate crystals. The H atom of the secondary amide forms centrosymmetric planar dimers with the carbonyl group of a second symmetry-related molecule. The ketone carbonyl of the -keto amide is present as the keto tautomer and not as the enol. The r.m.s. deviation of the atoms in the hydrogen-bonded dimer from the least-squares plane defined by those atoms is 0.014  Å.

Online 25 April 2002

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