Synthesis and Properties of 3′-Deoxypsiconucleosides: Anomeric 1-(3-Deoxy-D-<i>erythro</i>-2-hexulofuranosyl) thymines and 9-(3-Deoxy-D-<i>erythro</i>-2-hexulofuranosyl)adenines
作者:Alex Azhayev、Andrei Guzaev、Jari Hovinen、Jorma Mattinen、Reijo Sillanpää、Harri Lönnberg
DOI:10.1055/s-1994-25485
日期:——
Anomeric 1-(3-deoxy-D-erythro-2-hexulofuranosyl)thymines and 9-(3-deoxy-D-erythro-2-hexulofuranosyl)adenines were prepared by tin(IV) chloride catalyzed N-glycosylation of trimethylsilylated thymine and N 6-benzoyladenine with methyl 3-deoxy-D-erythro-2-hexulofuranoside triacetate or tribenzoate, respectively. These O-glycosides used as starting materials were obtained by deoxygenation of 1,2:4,5-di-O-isopropylidene-β-D-fructopyranose and subsequent acid-catalyzed methanolysis of the resulting 3-deoxy derivative. The anomeric configuration of the nucleosides prepared was assigned by a combination of X-ray crystallography and 2D 1H NMR spectroscopy. The conformation and hydrolytic stability of these new nucleoside analogous are discussed.
通过氯化锡(IV)催化三甲基硅烷化胸腺嘧啶的N-糖基化制备异头1-(3-脱氧-D-赤式-2-己氟呋喃糖基)胸腺嘧啶和9-(3-脱氧-D-赤式-2-己氟呋喃糖基)腺嘌呤N 6-苯甲酰腺嘌呤分别与3-脱氧-D-赤式-2-己氟呋喃苷三乙酸酯或三苯甲酸甲酯。这些用作起始材料的 O-糖苷是通过 1,2:4,5-二-O-异丙叉-β-D-吡喃果糖脱氧和随后产生的 3-脱氧衍生物的酸催化甲醇分解获得的。 所制备核苷的端基异构构型通过 X 射线晶体学和 2D 1H NMR 光谱的组合来确定。讨论了这些新核苷类似物的构象和水解稳定性。