CHEMICAL RNA SYNTHESIS METHOD

摘要

The invention relates to a method for the chemical synthesis of RNA, comprising the following steps: a) bonding to a solid support of a monomer having formula (II) in which - X1 is a dimethoxytrityl group, - X6 is H or an OAc group or OX3,in which X3 is a group having formula (A), in which X is O or S, R' is H or CH3 and R is selected from a linear or branched alkyl group at C1 to C4 and a R1-O-R2 group in which R1 is an alkyl group at C1 to C2 and R2 is a CH3 group or CH2CH2-O-CH3 or aryl; b) assembly with the monomer having formula (II) bound to the support thereof obtained in step (a) of at least one monomer having formula (III) in which X1, Bp, X3 are as defined for formula (II) and X5 is a hydrogen phosphonate monoester or phosphoramidite group, preferably a 2-cyanoethyl-N, N-diisopropylphosphoramidite group, which is used to obtain a protected single-strand RNA bound to a support.