[Summary]
[Problem] Provision of a novel compound which is easily-soluble in isopropyl acetate superior in liquid-separation operability, and can be used for a production method of peptide and the like, that provides a final product simply by extraction-layer-separating, without crystallization and isolation of each intermediate in each step.
[Solving Means] It has been found that the above-mentioned problems can be solved by a particular branched chain-containing aromatic compound.
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.
The present invention provides a particular branched chain-containing aromatic compound. The branched chain-containing aromatic compound of the present invention is easily-soluble in isopropyl acetate superior in liquid-separation operability, and can be used for a production method of peptide and the like, which provides a final product simply by extraction separation, without crystallization and isolation of each intermediate in each step.