ISSN:
1600-5759
Source:
Crystallography Journals Online : IUCR Backfile Archive 1948-2001
Topics:
Chemistry and Pharmacology
,
Geosciences
,
Physics
Notes:
In each of the two pyranoid sugars, ethyl 2-deoxy-4,5,6,8-tetra-O-acetyl-α-D-gluco-3,7-pyranoso-3-octulosonate, C18H26O12, and ethyl 2-deoxy-4,5,6,8-tetra-O-benzyl-α-D-galacto-3,7-pyranoso-3-octulosonate, C38H42O8, the anomeric configuration is α. 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.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1107/S0108270101014974
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