Acta Cryst. (2006). E62, o332-o333  [ doi:10.1107/S1600536805042194 ]

4a-Hydroxy-9-(3-nitrophenyl)-3,4,4a,5,6,7,9,9a-octahydro-2H-xanthene-1,8-dione

G. Hua, J. Xu, B. Jiang, Y. Zhang and S. Tu

Abstract: The title compound, C₁₉H₁₉NO₆, has been synthesized by the reaction of 3-nitrobenzaldehyde with 1,3-cyclohexanedione in glycol under microwave irradiation. The compound is an intermediate of the target product 9-(3-nitrophenyl)-3,4,6,7-tetrahydro-2H-xanthene-1,8(5H,9H)-dione. X-ray crystal-structure analysis reveals that the central hydropyran ring adopts a half-chair conformation.

Online 21 December 2005

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