Synthesis and Structural Analysis of Oxadiazole Carboxamide Deoxyribonucleoside Analogs
作者:Olga Adelfinskaya、Weidong Wu、V. Jo Davisson、Donald E. Bergstrom
DOI:10.1080/15257770500269267
日期:2005.9.1
(“south”) conformation. The orientation of the oxadiazole carboxamide nucleobase moiety was determined as anti (conformer A) and high anti (conformer B) in the case of the nucleoside analog 1 whereas the syn conformation is adapted by the unnatural nucleoside 2. Furthermore, nucleoside analogs 1 and 2 were converted with high efficiency to corresponding nucleoside triphosphates through the combination
两种新型 C-连接恶二唑甲酰胺核苷 5-(2'-deoxy-3',5'-β-D-erythro-pentofuranosyl)-1,2,4-oxadiazole-5-carboxamide (1) 和 5-(2) '-deoxy-3',5'-β-D-erythro-pentofuranosyl)-1,2,4-oxadiazole-3-carboxamide (2) 被成功合成并通过 X 射线晶体学表征。晶体学分析表明,非天然核苷类似物 1 和 2 均采用 C2'-内(“南”)构象。在核苷类似物 1 的情况下,恶二唑甲酰胺核碱基部分的取向被确定为抗(构象 A)和高抗(构象 B),而顺式构象由非天然核苷 2 调整。此外,核苷类似物 1 和 2通过组合化学酶促方法将其高效转化为相应的三磷酸核苷。恶二唑甲酰胺脱氧核糖核苷类似物是研究 DNA 聚合酶识别、核苷酸掺入保真度和延伸的宝贵工具。以纪念和庆祝约翰·A·蒙哥马利的生平和事业。