Abstract
The crystal structure, at 120 K, and solution 1H and 13C NMR spectra of ethyl 1,2,3,4-tetra-O-acetyl-β-D-glucopyranuronate, (8) have been determined. Compound 8 crystallizes in the triclinic space group, P1 (Z = 1) with a = 6.0209(3) Å, b = 8.9698(5) Å, c = 9.9818(8) Å, α = 104.965(2)°, β = 98.522(3)°, γ = 106.790(5)°. The Cremer and Pople puckering parameters [Q = 0.602(4) Å, θ = 7.1(4)°, φ = 325(3)°] for the pyranose ring in the solid state indicate a near ideal 4C1 chair conformation with a slight distortion in the direction towards 0H5. A number of weak, soft intermolecular C–H ⋅ ⋅ ⋅ O hydrogen bonds set up a 3D array. NMR spectra and FAB and EIMS data have been obtained. Solution NMR parameters suggest that the solid state conformation is maintained in solution in chloroform.
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Baddeley, T.C., Davidson, I.G., Skakle, J.M. et al. Ethyl 1,2,3,4-tetra-O-acetyl-β-D-glucopyranuronate. Journal of Chemical Crystallography 33, 33–38 (2003). https://doi.org/10.1023/A:1021347732701
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DOI: https://doi.org/10.1023/A:1021347732701