Use of ammonium aryl H-phosphonates in the preparation of nucleoside H-phosphonate building blocks
作者:Vita Ozola、Colin B Reese、Quanlai Song
DOI:10.1016/0040-4039(96)01993-4
日期:1996.11
Ammonium 4-methylphenyl H-phosphonate 4c was used in the conversion of 5′-O-(dimethoxytrityl)-2′-deoxynucleoside derivatives 6 into the corresponding 3′-H-phosphonates 2, which were isolated in a high state of purity and in high yield.
Aryl <i>H-</i>Phosphonates. 12. Synthetic and <sup>31</sup>P NMR Studies on the Preparation of Nucleoside <i>H-</i>Phosphonothioate and Nucleoside <i>H-</i>Phosphonodithioate Monoesters
Transformation of nucleosideH-phosphonate monoesters into the corresponding H-phosphonothioate and H-phosphonodithioate derivatives and possible side-reactions that may accompany this process were studied using (31)P NMR spectroscopy. These provided new insight into a possible mechanism involved in this transformation and constituted the basis for development of efficient methods for the preparation of nucleoside