A General Method for the Synthesis of 2‘-O-Cyanoethylated Oligoribonucleotides Having Promising Hybridization Affinity for DNA and RNA and Enhanced Nuclease Resistance
作者:Hisao Saneyoshi、Kohji Seio、Mitsuo Sekine
DOI:10.1021/jo051741r
日期:2005.12.1
2‘-O-cyanoethylated 5‘-O-dimethoxytritylribonucleoside 3‘-phosphoramidite derivatives in high yields. Fully 2‘-O-cyanoethylated oligoribonucleotides, (Uce)12 and (GceAceCceUce)3, were successfully synthesized in the phosphoramidite approach by use of the phosphoramidite building blocks. It was also found that oligoribonucleotides having a 2‘-O-cyanoethylated ribonucleoside (Uce, Cce, Ace, or Gce) could be obtained
开发了一种有效的合成2'-O-氰基乙基化寡核糖核苷酸的新方法,该方法是一类新型的2'-O-修饰的RNA。适当保护的核糖核苷衍生物与丙烯腈在Cs 2 CO 3存在下于t- BuOH中反应,以优异的收率得到2'-O-氰基乙基化核糖核苷衍生物,通过连续的选择性脱保护/保护策略将其转化为2'-O -氰基乙基化的5'- O-二甲氧基三苯甲基核糖核苷3'-亚磷酰胺衍生物高产率。完全2'-O-氰基乙基化的寡核糖核苷酸(Uce)12和(GceAceCceUce)3通过使用亚磷酰胺构件成功地以亚磷酰胺方法合成了α-β。还发现,可以通过从完全保护的寡核糖核苷酸中间体中选择性除去TBDMS基团而获得具有2'-O-氰基乙基化核糖核苷的寡核糖核苷酸(Uce,Cce,Ace或Gce),而无需通过使用NEt 3 ·3HF作为脱甲硅烷试剂。详细的T m实验表明,含有2'-O-氰基乙基化核糖核苷的寡核糖核苷酸对DNA和RN