Acta Crystallographica Section C

Crystal Structure Communications

Volume 57, Part 12 (December 2001)

Acta Cryst. (2001). C57, 1418-1420 [doi:10.1107/S0108270101014974]

Two ethyl 2-deoxy--D-hexo-3,7-pyranoso-3-octulosonate derivatives

A. Linden, X.-F. Li and C. K. Lee

Abstract: In each of the two pyranoid sugars, ethyl 2-deoxy-4,5,6,8-tetra-O-acetyl- [alpha] -D-gluco-3,7-pyranoso-3-octulosonate, C₁₈H₂₆O₁₂, and ethyl 2-deoxy-4,5,6,8-tetra-O-benzyl- [alpha] -D-galacto-3,7-pyranoso-3-octulosonate, C₃₈H₄₂O₈, the anomeric configuration is [alpha] . The acetoxymethyl substituent on the hexopyranose ring of the former compound and the ethoxycarbonylmethyl substituents in both sugars all have the gauche-trans conformation, while the benzyloxymethyl substituent of the galactopyranose sugar has the trans-gauche conformation. In each structure, the anomeric hydroxy group forms an intramolecular hydrogen bond with the carbonyl O atom of the ethoxycarbonylmethyl substituent.

Formula: C₁₈H₂₆O₁₂ and C₃₈H₄₂O₈

Online 6 December 2001


	Structure factor file (CIF format) (161.3 kbytes) Contains datablock I

	Structure factor file (CIF format) (211.0 kbytes) Contains datablock II

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