Nucleosides and oligonucleotides containing 1,2,3-triazole residues with nucleobase tethers: Synthesis via the azide-alkyne ‘click’ reaction
作者:Padmaja Chittepu、Venkata Ramana Sirivolu、Frank Seela
DOI:10.1016/j.bmc.2008.08.026
日期:2008.9
6 were incorporated into DNA using the phosphoramidite building blocks and employed in solid-phase synthesis. Melting experiments demonstrated that such 1,2,3-triazole nucleosides have a negative impact on the duplex stability when they are placed opposite to the canonical bases as well as abasic sites. The nucleobases attached to the triazole ring cannot involve in the base pair formation with the
通过铜(I)催化N-9炔丙基嘌呤或N-1炔丙基嘧啶与甲苯磺酰保护的1-azido-2的铜(I)催化的1,3-偶极环加成反应,制备了一系列与DNA核碱基相连的新型1,2,3-三唑核苷。 -脱氧呋喃核糖2,然后用NaOMe / MeOH或NH3水溶液处理。报道了这类化合物对选定的RNA病毒的抗病毒活性。从炔丙基化尿嘧啶1a和炔丙基化腺嘌呤1c与香豆素叠氮化物15合成强荧光的1,2,3-三唑化合物16和17,并研究了其荧光性质。使用亚磷酰胺结构单元将核苷4和6掺入DNA中,并用于固相合成。融化实验表明1,2,当3-三唑核苷与规范碱基以及无碱基位点相对放置时,它们会对双链体稳定性产生负面影响。连接到三唑环的核碱基不能参与具有相反碱基的碱基对的形成,因为三唑环引起的结构变化。当位于寡核苷酸的末端时,此类核苷的堆叠保留了DNA双链体的稳定性。通过分子模型研究了双链体结构,这支持了熔解实验的结果。当位于