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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >Crystal structure of 4-nitro­phenyl 6-O-ethyl-β-d-galacto­pyran­oside monohydrate
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Crystal structure of 4-nitro­phenyl 6-O-ethyl-β-d-galacto­pyran­oside monohydrate

机译:4-硝基苯基6-O-乙基-β-d-吡喃半乳糖苷一水合物的晶体结构

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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-iso­propyl­idene-α-d-galacto­pyran­ose using protecting-group strategies employed in carbohydrate chemistry, is reported. The asymmetric unit consists of a single galactoside mol­ecule, in which the pyran­oid ring has a 4C1 conformation and the 4-nitro­phenyl moiety is essentially planar. In the crystal, each carbohydrate is surrounded by other d-galactose residues and water mol­ecules, linked by O—H⋯O hydrogen bonds involving all hy­droxy groups, giving a two-dimensional substructure lying parallel to (100) and extended into three dimensions by C—H⋯O inter­actions.
机译:标题化合物C14H19NO8·H2O的合成与晶体结构,采用保护基策略,由6-O-乙基-1,2; 3,4-二-O-异亚丙基-α-d-吡喃半乳糖经三步制备碳水化合物化学方面的报道。不对称单元由单个半乳糖苷分子组成,其中吡喃类环具有4C1构象,而4-硝基苯基部分基本上是平面的。在晶体中,每种碳水化合物都被其他d-半乳糖残基和水分子包围,并通过涉及所有羟基的O-H = O氢键相连,形成了平行于(100)的二维子结构,并通过C-H⋯O相互作用。

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