Acta Crystallographica Section E

Structure Reports Online

Volume 69, Part 5 (May 2013)


organic compounds



go2086 scheme

Acta Cryst. (2013). E69, o772    [ doi:10.1107/S1600536813010313 ]

[(2S,3aR,6aR)-5-Oxohexahydrofuro[3,2-b]furan-2-yl]methyl acetate

M. González, A. Martínez, M. L. Rivadulla and M. J. Matos

Abstract: The title compound, C9H12O5, is a bicyclic lactone, presenting a 2,6-dioxabicyclo[3.3.0]octan-3-one skeleton, which was obtained through an intramolecular lactonization. The bicyclic lactone presents a cis ring-junction and a 1,5-trans-substituted tetrahydrofuran. Both five-membered rings are in twisted envelope conformations with one of the fused C atoms as the flap. The dihedral angle between the mean planes of the bicyclic lactone residue, defined by the dihydrofuran-2(3H)-one and the tetrahydrofuran rings, is 69.5 (2)°. The atoms of the ester chain are coplanar [maximum deviation = 0.013 (2) Å]. The absolute structure was not determined.


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