Direct Assignment of the Absolute Configuration of a Distinct Class of Deoxyribonucleoside Cyclic <i>N</i>-Acylphosphoramidites at Phosphorus by M-GOESY Nuclear Magnetic Resonance Spectroscopy
作者:Andrzej Wilk、Andrzej Grajkowski、Thomas E. Bull、Ann M. Dixon、Darón I. Freedberg、Serge L. Beaucage
DOI:10.1021/ja017190d
日期:2002.2.1
The determination of the absoluteconfiguration of deoxyribonucleoside cyclic N-acylphosphoramidites at phosphorus toward the synthesis of P-stereodifined phosphorothioated oligodeoxyribonucleotides is easily accomplished with computer-assisted molecular modeling and M-GOESY NMR spectroscopy. Specifically, computer-modeling diasteromeric phosphoramidite 3 has identifed a proximal (2.55 A) through-space