An efficient synthetic route for novel nucleosides has been realized. We report the formation of alpha-isomers in spite of neighboring group participation by the benzoyl group at the 2-position in N-glycosidation as well as discuss the stereoselectivity observed. We also found that non-silylated pyrimidin-2(1H)-ones and pyrimidin-2(1H)-thiones having aromatic structures reacted with 1-fluororibose in the presence of a Lewis acid to give the corresponding nucleosides in good to high yield. (c) 2012 Elsevier Ltd. All rights reserved.
Condensation of 1-Fluorofuranoses and Silylated Nucleobases Catalyzed by Tetrafluorosilane
作者:Ryoji Noyori、Masahiko Hayashi
DOI:10.1246/cl.1987.57
日期:1987.1.5
The title reaction provides a generally useful tool for nucleosidesynthesis. The stereoselectivities are highly influenced by the fluoride substrates, and steric course of the reaction of O-benzylated ribofuranosyl fluoride is solvent dependent.