The reaction of 5-azido-5-deoxy-2,3-O-isopropylidene-2-C-methyl-d-ribose with N,N-diethyl-2-(dimethylsulfuranylidene)acetamide gave the title compound, C15H26N4O5, as the major product arising from initial formation of an epoxide which was subsequently opened by intramolecular attack of the free 4-hydroxyl group. X-ray crystallography confirmed the relative stereochemistry of the title compound and the absolute configuration was determined by the use of d-ribose as the starting material. The crystal structure contains chains of molecules running parallel to the a axis, being linked by weak bifurcated O—H⋯(N,N) hydrogen bonds.
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