Reliable Chemical Synthesis of Oligoribonucleotides (RNA) with 2′-O-[(Triisopropylsilyl)oxy]methyl(2′-O-tom)-Protected Phosphoramidites
作者:Stefan Pitsch、Patrick A. Weiss、Luzi Jenny、Alfred Stutz、Xiaolin Wu
DOI:10.1002/1522-2675(20011219)84:12<3773::aid-hlca3773>3.0.co;2-e
日期:2001.12.19
A method for the introduction of the 2'-O-[(triisopropylsilyl)oxy]methyl (=tom) group into N-acetylated, 5'-O-dimethoxytritylated ribonucleosides is presented. The corresponding 2'-O-tom-protected phosphoramidite building blocks were obtained in pure form and were successfully employed for the routine synthesis of oligoribonucleotides on DNA synthesizers. Under DNA coupling conditions (2.5 min coupling
介绍了一种将 2'-O-[(triisopropylsilyl)oxy]methyl (=tom) 基团引入 N-乙酰化、5'-O-二甲氧基三苯甲基化核糖核苷的方法。相应的 2'-O-tom 保护的亚磷酰胺结构单元以纯形式获得,并成功用于 DNA 合成仪上寡核糖核苷酸的常规合成。在 DNA 偶联条件下(1.5 mmol 合成规模的偶联时间为 2.5 分钟)并以 5-(苄硫基)-1H-四唑 (BTT) 作为活化剂。2'-O-tom 保护的亚磷酰胺表现出 av。耦合产率 >99.4%。N-乙酰基和 2'-O-tom 保护基团的组合实现了可靠和完整的两步脱保护,首先使用 EtOH/H2O 中的 MeNH2,然后使用 THF 中的 Bu4NF,而不会同时破坏产物 RNA 序列。[关于 SciFinder (R)]