OPTICALLY ACTIVE SEGMENT FOR USE IN SYNTHESIS OF STEREOCONTROLLED OLIGONUCLEOTIDE, METHOD FOR PRODUCING THE SAME, AND METHOD FOR SYNTHESIZING STEREOCONTROLLED OLIGONUCLEOTIDE USING THE SAME

摘要

An optically active segment for use in synthesis of a stereocontrolled oligonucleotide represented by the following formula (I), a method for producing the same, and a method for synthesizing a stereocontrolled oligonucleotide therefrom are provided. In formula, B is a protected/unprotected nucleoside base; R1 is substituted/unsubstituted aliphatic group; R2, R3 is a DMTr group or —P(R11)(NR12)2; R11 is OCH2CH2CN, SCH2CH2CN, etc.; R12 is a substituted/unsubstituted aliphatic group or aromatic group; X is H, an alkyl, O-alkyl, etc.; Y is H, NHR13, a halogen, etc., or a hydroxyl group protected with an acyl, ether, or silyl, or forms an X—Y bond with X; and n is an integer of 0 or more and 4 or less.;