Acta Cryst. (2010). E66, o259  [ doi:10.1107/S1600536809055081 ]

Ethyl 3-methyl-4-oxo-4,5-dihydro-1H-pyrrolo[2,3-d]pyridazine-2-carboxylate

S.-Q. Chen, K. Jiang and S.-F. Wang

Abstract: The title compound, C₁₀H₁₁N₃O₃, was synthesized by the reaction of 3,5-bis(ethoxycarbonyl)-2-formyl-4-methyl-1H-pyrrole and hydrazine hydrate. The angle between the pyrrole ring and the pyridazinone ring is 0.93 (9)°. In the crystal, intermolecular N-HO and N-HN hydrogen-bond interactions link the molecules into a two-dimensional network.

Online 9 January 2010

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