Journal of Organic Chemistry p. 4608 - 4615 (1991)
Update date:2022-07-29
Topics:
Lyttle, Matthew H.
Wright, Peter B.
Sinha, Nanda D.
Bain, J. D.
Chamberlin, A. Richard
The 5'-O-(4,4'-dimethoxytrityl)-2'-O-(trialkylsilyl)ribonucleoside 3'-O-(2-cyanoethyl N,N-diethylphosphoramidites) 3, 5, 7, and 9, modified monomers for RNA synthesis, were prepared from 2-cyanoethyl N,N-diethylchlorophosphoramidite (1).In conjunction with newly developed coupling protocols for automated solid-phase synthesis, they afforded synthetic oligoribonucleotides up to 74 base units in length.The performance of the new compounds was compared to the analogous 5'-O-(4,4'-dimethoxytrityl)-2'-O-(trialkylsilyl)ribonucleoside 3'-O-(2-cyanoethyl N,N-diisopropylphosphoramidites) 4, 6, 8, and 10.Complete removal of benzoyl groups from N2-benzoylguanosine, which was incorporated into some of the synthetic oligoribonucleotides, was demonstrated.Purification procedures by reverse phase HPLC and PAGE methods are also presented.
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