Acta Cryst. (2011). E67, o1906  [ doi:10.1107/S1600536811025244 ]

2-Hydroxy-2,3,5,10,11,11a-hexahydro-1H-pyrrolo[2,1-c][1,4]benzodiazepine-5,11-dione

S. Ourahou, H. Zouihri, M. Massoui, E. M. Essassi and S. W. Ng

Abstract: The seven-membered ring of the title compound, C₁₂H₁₂N₂O₃, which is fused with the phenylene ring, adopts a boat-shaped conformation (with the methine C atom as the prow and the phenylene C atoms as the stern); the H atom on the methine linkage exists in an axial position. The five-membered ring that is fused with the seven-membered ring adopts an envelope conformation (with the C atom bearing the hydroxy substituent representing the flap) [the deviation from the plane defined by the other four atoms is 0.200 (7) Å in one molecule and 0.627 (5) Å in the other]. The two independent molecules are disposed about a pseudo center of inversion and are connected by a pair of N-HO hydrogen bonds. Adjacent dimers are linked by a pair of O-HO hydrogen bonds, generating a chain running along the b axis.

Online 6 July 2011

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