Methods of synthesizing oligonucleotides via new intermediates on a cleavable support having an azidomethyl moiety are disclosed. The method comprises multiple reaction cycles, each of which comprises sequential coupling a nucleoside or oligonucleotide subunit on a cleavable support having an azidomethyl moiety and a nucleoside phosphoramidite or an oligonucleotide phosphoramidite, capping, oxidation/thiolation and deblocking; followed by orthogonal cleavage of the azidomethyl support while keeping all other protecting groups intact. The method can be used in combination with a support moiety for either solid phase or liquid phase oligo synthesis. The soluble support facilitates homogeneous reactions and efficient separations by simple precipitation. The methods also provide novel intermediates useful in the synthesis of oligonucleotide conjugates.
本发明揭示了通过具有偶氮甲基基团的可切割支撑体上的新中间体合成寡核苷酸的方法。该方法包括多个反应循环,每个循环包括在具有偶氮甲基基团的可切割支撑体上顺序耦合核苷酸或寡核苷酸亚基和核苷酸
磷酸酯或寡核苷酸
磷酸酯、盖帽、氧化/
硫化和去保护基;然后通过正交裂解偶氮甲基支撑体,同时保持所有其他保护基完整。该方法可与固相或液相寡聚物合成的支撑基团结合使用。可溶性支撑体通过简单沉淀促进均相反应和高效分离。该方法还提供了在合成寡核苷酸共轭物中有用的新型中间体。