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Crystal structure of 4-nitro-phenyl 6-O-ethyl-?-d-galacto-pyran-oside monohydrate.

ABSTRACT: The synthesis and crystal structure of the title compound, C14H19NO8·H2O, prepared in three steps from 6-O-ethyl-1,2;3,4-di-O-iso-propyl-idene-?-d-galacto-pyran-ose using protecting-group strategies employed in carbohydrate chemistry, is reported. The asymmetric unit consists of a single galactoside mol-ecule, in which the pyran-oid ring has a 4C1 conformation and the 4-nitro-phenyl moiety is essentially planar. In the crystal, each carbohydrate is surrounded by other d-galactose residues and water mol-ecules, linked by O-H?O hydrogen bonds involving all hy-droxy groups, giving a two-dimensional substructure lying parallel to (100) and extended into three dimensions by C-H?O inter-actions.

SUBMITTER: Silva BL 

PROVIDER: S-EPMC5382630 | biostudies-literature | 2017 Apr

REPOSITORIES: biostudies-literature

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Crystal structure of 4-nitro-phenyl 6-<i>O</i>-ethyl-β-d-galacto-pyran-oside monohydrate.

Silva Bruno Leonardo BL   Alves Ricardo José RJ   Speziali Nivaldo Lúcio NL  

Acta crystallographica. Section E, Crystallographic communications 20170328 Pt 4

The synthesis and crystal structure of the title compound, C<sub>14</sub>H<sub>19</sub>NO<sub>8</sub>·H<sub>2</sub>O, prepared in three steps from 6-<i>O</i>-ethyl-1,2;3,4-di-<i>O</i>-iso-propyl-idene-α-d-galacto-pyran-ose using protecting-group strategies employed in carbohydrate chemistry, is reported. The asymmetric unit consists of a single galactoside mol-ecule, in which the pyran-oid ring has a <sup>4</sup><i>C</i><sub>1</sub> conformation and the 4-nitro-phenyl moiety is essentially plana  ...[more]

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