Synthesis and Rearrangement of 3′-α-Diethylphosphono-3′-β-O-methanesulfonyluridines
作者:Tracy J Baker、David F Wiemer
DOI:10.1016/s0040-4020(00)00198-8
日期:2000.5
Preparation of a uridine derivative bearing both diethylphosphono and methanesulfonate substituents at the 3′-position has been accomplished by reaction of the corresponding α-hydroxy phosphonate with methanesulfinyl chloride and subsequent oxidation. While this methanesulfonate did not undergo elimination under standard reaction conditions, treatment with TBAF results in a novel rearrangement leading to the
Nucleophilic addition of a dialkyl phosphite anion to 2'- or 3'-keto nucleosides results in an efficient synthesis of 2'-hydroxy-2'-phosphono- or 3'-hydroxy-3'-phosphononucleosides. The stereochemistry of one such adduct, 5'-O-trityl-3'-beta-hydroxy-3'-alpha-(diethyl)phosphonothymidine, was determined by single crystal diffraction analysis.