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The sugar ring of 1-O-benzyl-β-L-arabinopyranose (C12H16O5), (I) adopts the 4C1 chair conformation. In 1-O-benzyl-3,4-O-isopropylidene-β-L-arabinopyranose (C15H20O5), (II) and 1-O-benzyl-2-O-benzoyl-3,4-O-isopropylidene-β-L-arabinopyranose (C22H24O6), (III), the pyranosyl rings have a slightly distorted chair 4C1 towards 0H1 conformation. The five-membered isopropylidene ring in (II) and (III) adopts a slightly distorted envelope conformation. The methylene carbon atoms of the benzyl group are slightly displaced out of the plane of the phenyl ring in all three crystal structures. All three hydroxy groups in (I) participate in hydrogen bonds each as donor and acceptor simultaneously, forming a two-dimensional hydrogen-bond network. In (II), molecules linked by hydrogen bonds form polymeric chains along the b axis.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks default, I, II, III

CCDC references: 126866; 126867; 126868

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