Methods for preparing oligonucleotide analogs which have improved nuclease resistance and improved cellular uptake are provided. In preferred embodiments, the methods involve reductive coupling of 3'- and 4'-substituted or 4'- and 3'-substituted nucleosidic synthons.
提供了一种制备具有改善
核酸酶抗性和细胞摄取能力的寡核苷酸类似物的方法。在优选实施例中,该方法涉及3'-和4'-取代或4'-和3'-取代核苷合成子的还原偶联。