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. 2014 Apr 16;70(Pt 5):o561-2.
doi: 10.1107/S1600536814007922. eCollection 2014 May 1.

Methyl 4-O-benzyl-α-l-rhamno-pyrano-side

Robert Pendrill  1 , Lars Eriksson  2 , Göran Widmalm  1
Affiliations

Methyl 4-O-benzyl-α-l-rhamno-pyrano-side

Robert Pendrill et al. Acta Crystallogr Sect E Struct Rep Online. .

Abstract

In the title compound, C14H20O5, an inter-mediate in the synthesis of oligosaccharides, the glycosidic [H-C-O-C(H3)] torsion angle ϕH is 52.3° and the exo-cyclic [H-C-O-C(H2)] torsion angle θH is -11.7°. The hexa-pyran-ose ring has a chair conformation. In the crystal, mol-ecules are linked by O-H⋯O hydrogen bonds, forming chains propagating along [010]. Enclosed within the chains are R 3 (3)(12) ring motifs involving three mol-ecules. The chains are linked via C-H⋯π inter-actions, forming a three-dimensional network.

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Figures

Fig. 1.
Fig. 1.
The molecular structure of the title molecule with atom labelling. Displacement ellipsoids are drawn at the 50% probability level. The long-range heteronuclear NMR coupling constant was measured beteen nuclei H4 (blue) and C40 (graphite).
Fig. 2.
Fig. 2.
A partial view along the b axis of the crystal packing of the title compound. Hydrogen bonds are shown as dashed lines (see Table 1 for details).
See this image and copyright information in PMC

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