| abstract |
A compound represented by the general formula [2]: [2] (wherein R2 and R3 each independently represents hydrogen, halogeno, methoxy, 2-methoxyethoxy, or hydroxy; and B2 and B3 each independently represents a nucleic acid base) or a salt thereof can be synthesized from a compound represented by the general formula [1]: [1] (wherein R1 represents hydrogen, halogeno, methoxy, 2-methoxyethoxy, or hydroxy substituted by a hydroxy-protecting group, and B1 represents an optionally protected nucleic acid base). |