A two-step sulfurization for efficient solution-phase synthesis of phosphorothioate oligonucleotides
作者:Amar B.T. Ghisaidoobe、Martijn C. de Koning、Howard I. Duynstee、Paul B.W. Ten Kortenaar、Herman S. Overkleeft、Dmitri V. Filippov、Gijs A. van der Marel
DOI:10.1016/j.tetlet.2008.03.025
日期:2008.5
A solution-phase approach for the synthesis of phosphorothioate oligonucleotides that circumvents the use of chromatographic purifications of protected phosphorothioate intermediates was developed. Implementation of a two-step sulfurization protocol in the phosphoramidite method allows efficient isolation of the intermediate phosphorothioates by extractions. The viability of this approach is demonstrated by the synthesis of a hexameric phosphorothioate oligonucleotide fragment. (C) 2008 Elsevier Ltd. All rights reserved.