Acta Cryst. (2003). E59, o1063-o1065  [ doi:10.1107/S1600536803012352 ]

1-(2',3'-Anhydro-5'-O-benzoyl--D-lyxofuransoyl)-5-fluorouracil

T. R. Wagner, R. R. Gadikota, C. S. Callam and T. L. Lowary

Abstract: The crystal structure of the title compound, C₁₆H₁₃FN₂O₆, was determined in order to establish the relative stereochemistry between the nucleoside base and the epoxide ring oxygen. This analysis allowed us to establish that the relationship of these two groups is cis. The furanose ring adopts an envelope conformation in which the oxygen is displaced above the plane (°E). The pseudorotational phase angle (P) is 88.5° and the puckering amplitude (_m) is 29.8°. The conformation about the C4-C5 bond is gauche-trans (ap) and the nucleoside base adopts the anti orientation.

Online 30 June 2003

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