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.
提供了制备寡核苷酸类似物的方法,这些类似物具有改善的
核酸酶抗性和改善的细胞摄取能力。在优选实施例中,该方法涉及3'-和4'-取代或4'-和3'-取代的核苷合成物的还原偶联。