Ethyl (2,5-dioxo-1-phenyl-2,3-dihydro-1H,5H-1-benzofuro[3,2-d]imidazo[1,2-a]pyrimidin-3-yl)acetate

In the title compound, C22H17N3O5, synthesized via the aza-Wittig reaction of ethyl 3-(phenyliminomethyleneamino)benzofuran-2-carboxylate, benzene isocyanate and diethyl 2-aminosuccinate, the imidazo[1,2-a]benzo[4,5]furo[2,3-d]pyrimidine ring system is essentially planar (r.m.s. deviation for all 16 non-H atoms = 0.020 ). The phenyl ring is twisted with respect to this ring system, making a dihedral angle of 54.23 (4)°. The crystal packing is stabilized by weak intermolecular C—H...O interactions.