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[(2R,3S,5R)-3-Acet-oxy-5-(5-formyl-2,4-dioxo-1,2,3,4-tetra-hydro-pyrimidin-1-yl)-2,3,4,5-tetra-hydro-furan-2-yl]methyl acetate.

Research paper by Xue-Fei XF Jia, Nan N Liu, Liang-Liang LL Fang, Xin-Ying XY Zhang

Indexed on: 06 Jan '12Published on: 06 Jan '12Published in: Acta Crystallographica Section E



Abstract

In the two independent but very similar mol-ecules (A and B) of the title compound, C(14)H(16)N(2)O(8), both six-membered pyrimidine rings are nearly planar [maximum deviations = 0.010 (3) Å in A and 0.028 (3) Å in B]. The five-membered furan-ose ring in mol-ecule A adopts an envelope conformation, while the same ring in mol-ecule B has a twisted conformation. In the crystal, the A mol-ecules are linked via a pair of inter-molecular N-H⋯O hydrogen bonds, forming dimers. Each A mol-ecule is further linked to a B mol-ecule via a second N-H⋯O hydrogen bond. There are also a number of C-H⋯·O inter-actions present, leading to the formation of a three-dimensional network.