The present invention provides a protected nucleotide for elongation, which can be purified efficiently and in a high yield by a liquid-liquid extraction operation, and can achieve an oligonucleotide production method by a phosphoramidite method.
It has been found that the above-mentioned problem can be solved by a particular oligonucleotide comprising a protected base and/or particular oligonucleotide protected by a branched chain-containing aromatic group at 3′-position.
本发明提供了一种用于延伸的保护核苷酸,可以通过液液萃取操作高效率、高产量地纯化,并可通过
磷酰胺酰胺法实现寡核苷酸的生产方法。发现通过在3'-位置含有支链含芳香基团的特定寡核苷酸和/或特定寡核苷酸保护基,可以解决上述问题。