Abstract
3a,8a-Dihydroxy-2,8-dioxo-1,3a,8,8a-tetrahydro-2H-indeno[1,2-d]imidazole-3-carboxamide has been synthesized in 85% yield from ninhydrin and biuret via a green facile procedure that is free of workup and column chromatography. The product structure has been established based on FT-IR, NMR, and mass spectra and finally confirmed by single crystal X-ray analysis. The compound crystalized as monoclinic colorless plates with P2(1)/c space group.