Synthesis of 2′-<i>O</i>-[2-(<i>N</i>-Methylcarbamoyl)ethyl]ribonucleosides Using Oxa-Michael Reaction and Chemical and Biological Properties of Oligonucleotide Derivatives Incorporating These Modified Ribonucleosides
作者:Takeshi Yamada、Natsuki Okaniwa、Hisao Saneyoshi、Akihiro Ohkubo、Kohji Seio、Tetsuya Nagata、Yoshitsugu Aoki、Shin’ichi Takeda、Mitsuo Sekine
DOI:10.1021/jo101963z
日期:2011.5.6
2′-O-modification on the nuclease resistance of oligonucleotides incorporating the 2′-O-modified ribonucleosides and their hybridization affinities for the complementary RNA and DNA strands, 2′-O-MCE-ribonucleoside phosphoramidite derivatives were successfully synthesized and subjected to the synthesis of 2′-O-MCE-oligonucleotides and 2′-O-methyl-oligonucleotides incorporating 2′-O-MCE-ribonucleosides. The 2′-O
为了开发含有新的2'- O-修饰的核糖核苷作为核酸药物的寡核苷酸,我们合成了3种类型的在2'-羟基被2-(甲氧基羰基)乙基(MOCE),2-(N-甲基氨基甲酰基)修饰的核糖核苷衍生物。通过适当保护的核糖核苷(U,C,A和G)衍生物的oxa-Michael反应,将乙基(MCE)和2-(N,N-二甲基氨基甲酰基)乙基(DMCE)基团作为关键中间体。其中,发现2'- O- MCE核糖核苷在碱性条件下最稳定。研究2'- O-修饰对掺入2'- O的寡核苷酸的核酸酶抗性的影响修饰的核糖核苷及其对互补RNA和DNA链的杂交亲和力,成功合成了2' - O -MCE-核糖核苷亚磷酰胺衍生物,并进行了2' - O -MCE-寡核苷酸和2'- O-甲基-核苷酸的合成包含2' - O -MCE-核糖核苷的寡核苷酸。2'- Ô -MCE寡核苷酸和嵌合低聚物2'- ö -MCE和2'- ö甲基基团如此得到证实互补RNA链和高得多的核酸酶抗性比相应的2'-