121058-83-1Relevant articles and documents
THE USE OF LABILE BASE PROTECTING GROUPS IN OLIGORIBONUCLEOTIDE SYNTHESIS
Chaix, Carole,Molko, Didier,Teoule, Robert
, p. 71 - 74 (1989)
The use of phenoxyacetyl group for the protection of the exocyclic amino function of purine bases and acetyl group for cytosine in oligonucleotide synthesis by the cyanoethylphosphoramidite approach is described.A side reaction - i.e. partial replacement of phenoxyacetyl group of protected guanines by acetyl group - was observed during the capping step.It can be avoided by the use of phenoxyacetic anhydride in place of acetic anhydride.
High yield protection of purine ribonucleosides for phosphoramidite RNA synthesis
Song, Quanlai,Wang, Weimin,Fischer, Artur,Zhang, Xiaohu,Gaffney, Barbara L.,Jones, Roger A.
, p. 4153 - 4156 (2007/10/03)
We report high yield procedures for protection of purine ribonucleosides based on a reaction which allows concomitant highly regiospecific 2'-silylation and 3'-phosphitylation. Subsequent cleavage of the H-phosphonate monoester moiety without silyl migration provides intermediates ready for phosphitylation by standard methods to give fully protected phosphoramidites.