Syntheses, molecular structures, and antiviral activities of 1- and 2-(2′-deoxy-d-ribofuranosyl)cyclohepta[d][1,2,3]triazol-6(1H)-ones and 1-(2′-deoxy-d-ribofuranosyl)cyclohepta[b]pyrrol-8(1H)-one
作者:Tomoo Nakazawa、Takeshi Ohmae、Masahiro Fujimuro、Masahiko Ito、Tohru Nishinaga、Masahiko Iyoda
DOI:10.1016/j.tet.2012.04.109
日期:2012.7
The synthesis of a novel class of 2′-deoxyribonucleosides possessing tropone-fused nitrogen heterocycles as nucleobases was developed. The reaction of alkali metal salts of 1H-cyclohepta[d][1,2,3]triazol-6-one with 2-deoxy-3,5-di-O-(p-toluoyl)-α-d-ribofuranosyl chloride (α-chlorosugar) afforded an anomeric mixture of N1- and N2-coupled glycosylation products. Good stereospecificity in relation to the
开发了一种新型的2'-脱氧核糖核苷类化合物,其具有托酮融合的氮杂环作为核碱基。1 H-环庚[ d ] [1,2,3]三唑-6-的碱金属盐与2-脱氧-3,5-二-O-(对甲苯甲酰基)-α- d-呋喃呋喃糖基的反应氯化物(α-氯糖)可得到N1和N2偶联糖基化产物的异头混合物。在极性较小的溶剂DME中,相对于β-端基异构体的量,具有良好的立体特异性。1 H-环庚烷钠盐的反应[ bDME中的] pyrrol-8-one及其3-甲基衍生物与α-氯糖形成N1偶联糖基化产物的β-异头物。用NaOMe的MeOH溶液处理糖基化产物,以产生所需的2'-脱氧核糖核苷。所制备的三种核苷的X射线结构分析证实了它们的异头构型,并表明它们的糖已起皱。与无环鸟苷(ACV)相比,核苷的β-异头物对1型单纯疱疹病毒和2型单纯疱疹病毒的抗病毒活性较弱。这些核苷对肺(A549)和两个结肠癌(HT-29和HCT-116)癌细胞系均无细胞毒性。