Bicyclic nucleoside analogues, 3â²-O,4â²-C-methyleneribonucleosides 1, including thymine, cytosine, adenine and guanine nucleobases, were conveniently synthesized from D-glucose, and the ribofuranose ring of 1 was found to exist predominantly in a S-conformation by means of 1H NMR and X-ray analysis.
双环核苷类似物,3²-O,4²-C-亚甲基核苷1,包括胸腺
嘧啶、
胞嘧啶、
腺嘌呤和
鸟嘌呤核苷,可通过
D-葡萄糖方便地合成,并通过1H NMR和X射线分析发现1的
呋喃核糖环主要以S构象存在。