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首页> 外文期刊>Acta Crystallographica Section E: Crystallographic Communications >5-Amino-1-(2′,3′-O-iso­propyl­idene-d-ribit­yl)-1H-imidazole-4-carboxamide: a crystal structure with Z′ = 4
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5-Amino-1-(2′,3′-O-iso­propyl­idene-d-ribit­yl)-1H-imidazole-4-carboxamide: a crystal structure with Z′ = 4

机译:5-氨基-1-(2',3'-O-异亚丙基-d-核糖基)-1H-咪唑-4-羧酰胺:Z'= 4的晶体结构

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摘要

The title compound, C12H20N4O5, crystallizes in the monoclinic space group P21, with four crystallographically independent mol­ecules in the asymmetric unit. The four mol­ecules have a very similar conformation that is basically determined by the formation of two intra­molecular hydrogen bonds between the amino NH2 donors and the carbonyl and ring O-atom acceptors, forming, respectively, R(6) and R(7) ring motifs.. In the crystal, inter­molecular hydrogen bonding leads to the formation of R22(10) ring patterns, involving one amide CONH2 donor and an imidazole N-atom acceptor. The cluster of the four independent mol­ecules has approximate non-crystallographic C2 point symmetry. The structural analysis also shows that during the synthesis of the title compound, the reductive cleavage of the d-ribose ring of the inosine precursor proceeds stereoselectively, with retention of configuration.
机译:标题化合物C12H20N4O5在单斜空间群P21中结晶,在不对称单元中具有四个晶体学独立的分子。这四个分子具有非常相似的构象,基本上是由氨基NH2供体与羰基和环O原子受体之间形成两个分子内氢键决定的,分别形成R(6)和R(7)环基序..在晶体中,分子间氢键导致形成R22(10)环图,涉及一个酰胺CONH2供体和一个咪唑N原子受体。四个独立分子的簇具有近似非晶体的C2点对称性。结构分析还表明,在标题化合物的合成过程中,肌苷前体的d-核糖环的还原性裂解立体选择性地进行,并保留了构型。

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