and energies of 2,3- and 3,5- O -isopropylidene-α- and -β- D -ribo- and - L -lyxo-furanoses, and for the 2,3- and 3,5- O -methylene derivatives of 1,4-anhydro- D -ribitol and - L -lyxitol and the related O -isopropylidene derivatives. Calculations were also performed for model compounds of C -glycosides, where the hydroxyl group of the ribo- and lyxo -furanose derivatives was replaced by a methyl group
摘要报道了2,3-和3,5-O-异亚丙基-α-和-β-
D-核糖-和-L-lyxo-
呋喃糖酶的几何构型和能量的分子力学计算,以及2,3 1,4-脱
水-
D-核糖醇和-
L-木糖醇的-和3,5-O-亚甲基衍
生物以及相关的O-异亚丙基衍
生物。还对C-糖苷的模型化合物进行了计算,其中
核糖-和lyxo-
呋喃糖衍
生物的羟基被甲基取代。根据构象平衡,2,3-和3,5-O-亚烷基衍
生物的结构平衡以及构型平衡(端基和C-4-表异构体)讨论了结果。这些预测通常与可用的实验数据非常吻合。