The “β-Fluorine Effect” in the Non-Metal Hydride Radical Deoxygenation of Fluorine-Containing Nucleoside Xanthates
摘要:
An alternative method to conduct a Barton-McCombie deoxygenation in nucleosides Is described. The utility of the procedure is limited to structures with an electronegative substituent, particularly fluorine, in the beta-position relative to the radical center. The process is radical in nature and triggered by peroxides. The abstraction of hydrogen from the solvent is favorably influenced by the presence of a beta-fluorine.