Synthesis and geometry of methyl (methyl 4-O-acetyl-3-azido-2,3-dideoxy-alpha/beta-D-arabino- and -alpha/beta-D-ribo-hexopyranosid)uronates.
The synthesis of methyl (methyl 4-O-acetyl-3-azido-2,3-dideoxy-alpha/beta-D-arabino- and -alpha/beta-D-ribo-hexopyranosid)uronates is presented. High resolution (1)H and (13)C NMR spectral data for all diastereoisomers and single-crystal X-ray diffraction analysis for methyl (methyl 3-azido-2,3-dideoxy-beta-D-arabino-hexopyranosid)uronate are reported. The planarity of the 4-OAc and 5-COOMe groups as well as the orientations of the aglycone and azide groups in the crystal lattice is discussed. The influence of the 5-COOMe group on the pyranose ring conformation is considered.
Faculty of Chemistry, University of Gdańsk, Sobieskiego 18, PL-80-952 Gdańsk, Poland.
Dorota
D
Tuwalska
Artur
A
Sikorski
Beata
B
Liberek
D002241:Carbohydrates / Q000737:chemistry*; D018360:Crystallography, X-Ray; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D014574:Uronic Acids / Q000737:chemistry*
D002241:Carbohydrates; D014574:Uronic Acids