Influence of intramolecular hydrogen-bonding on the conformation of 3-deoxy-3-thioureido sugars
作者:JoséM. García Fernández、Carmen Ortiz Mellet、JoséL. Jiménez Blanco、José Fuentes、Maria Jesús Diánez、Maria Dolores Estrada、Amparo López-Castro、Simeón Pérez-Garrido
DOI:10.1016/0008-6215(96)00039-0
日期:1996.6
Abstract 3-Deoxy-3-thioureido derivatives of 1,2:5,6- di -O- isopropylidene -α- d - allofuranose and 1,2:5,6- di -O- isopropylidene -α- d - glucofuranose were prepared, and their conformational properties in chloroform-d solutions were studied by temperature variable 1H NMR spectroscopy. The whole results, which include temperature coefficient data for the exchangeable pseudoamide protons, support
摘要1,2:5,6-二-O-异亚丙基-α-d-异呋喃糖和1,2:5,6-二-O-异亚丙基-α-d-葡糖呋喃糖的3-脱氧-3-硫脲基衍生物是制备,并通过温度可变1H NMR光谱研究了它们在氯仿-d溶液中的构象性质。整个结果,包括可交换假酰胺质子的温度系数数据,证明存在d-葡萄糖N,N'-二取代衍生物的糖NHC(S)E-旋转异构体的存在基本上可以归因于存在分子内氢键类似于肽γ-转角的特征。