title: Solid-phase synthesis of oligoribonucleotides.
abstract: Selective deprotection of the 5'-O-dimethoxytrityl group of oligoribonucleotides required for 5'-deprotection reaction during synthesis of an oligoribonucleotide was achieved by the treatment with 1% dichloroacetic acid in dichloromethane at room temperature, without removal of the 2'-O-tetrahydropyranyl group. Phosphorylation of protected ribonucleosides and coupling reaction to the 5' end of oligoribonucleotides attached to polystyrene solid support were carried out by the use of bifunctional reagent 2-chlorophenyl-O-O-bis(1-benzotriazolyl) phosphate. In this way, trinucleotides; TpTpT, dUpdUpT, and UpUpT, were synthesized.
mesh_terms: D002851:Chromatography, High Pressure Liquid; D004355:Drug Stability; D007202:Indicators and Reagents; D009843:Oligoribonucleotides / Q000138:chemical synthesis*; D013329:Structure-Activity Relationship
chemical_list: D007202:Indicators and Reagents; D009843:Oligoribonucleotides