title: An efficient reagent for the phosphorylation of deoxyribonucleosides, DNA oligonucleotides, and their thermolytic analogues.
abstract: [reaction: see text] The phosphoramidite 11 was prepared in three steps from methyl 2-mercaptoacetate and demonstrated efficiency in the synthesis of conventional 5'-/3'-phosphate/thiophosphate monoester derivatives of 2'-deoxyribonucleosides and DNA oligonucleotides. Moreover, the use of 11 has enabled the preparation of the dinucleoside phosphorothioate analogue 26 in high yields (>95%) with minimal cleavage (<2%) of the thermolytic thiophosphate protecting group.
authors.affiliation: Division of Therapeutic Proteins, Center for Drug Evaluation and Research, Food and Drug Administration, 8800 Rockville Pike, Bethesda, Maryland 20892, USA.
authors.forename: Cristina
authors.initials: C
authors.lastname: Ausín
authors.forename: Andrzej
authors.initials: A
authors.lastname: Grajkowski
authors.forename: Jacek
authors.initials: J
authors.lastname: Cieślak
authors.forename: Serge L
authors.initials: SL
authors.lastname: Beaucage
mesh_terms: D004247:DNA / Q000737:chemistry*; D003853:Deoxyribonucleosides / Q000737:chemistry*; D007202:Indicators and Reagents / Q000737:chemistry; D015394:Molecular Structure; D009841:Oligonucleotides / Q000737:chemistry*; D009943:Organophosphorus Compounds / Q000737:chemistry; D010710:Phosphates / Q000737:chemistry; D010766:Phosphorylation; D013696:Temperature
chemical_list: D003853:Deoxyribonucleosides; D007202:Indicators and Reagents; D009841:Oligonucleotides; D009943:Organophosphorus Compounds; D010710:Phosphates; C434331:phosphoramidite; D004247:DNA