An Efficient Approach to the Synthesis of Nucleosides: Gold(I)-Catalyzed N-Glycosylation of Pyrimidines and Purines with Glycosyl ortho-Alkynyl Benzoates
Persuaded with gold: The title reaction in the presence of [Ph3PAuNTf2] (Tf=trifluoromethanesulfonyl) led conveniently to the corresponding nucleosides with excellent regioselectivity (see scheme). Even purine derivatives underwent this transformation owing to the mild conditions, which enabled the use of protecting groups that would not usually be compatible with N‐glycosylation conditions.
An improved procedure for nucleoside synthesis using glycosyl trifluoroacetimidates as donors
作者:Jinxi Liao、Jiansong Sun、Biao Yu
DOI:10.1016/j.carres.2009.03.010
日期:2009.5
Using glycosyl trifluoroacetimidates as donors and nitromethane (or acetonitrile) as solvent, silylation and subsequent glycosylation were realized in a 'one-pot' procedure to provide the corresponding nucleosides derivatives in high yields.[GRAPHICS](C) 2009 Elsevier Ltd. All rights reserved.