A diastereoselective method for the synthesis of ribo-C-nucleosides is described that relies on a Heckreaction, followed by epoxidation with TFDO, desilylation and reduction with borohydride to give access to this important class of compounds without the need for reaction conditions incompatible with reactive groups or separation of anomers.
Syntheses of Pyridine C-Nucleosides as Analogues of the Natural Nucleosides dC and dU
作者:Zhenhua Sun、Shahadat Ahmed、Larry W. McLaughlin
DOI:10.1021/jo060066y
日期:2006.3.31
The syntheses of four pyrimidine C-nucleosides are described. These derivatives are designed as mimics of dC and dU, and in that respect, each can form two hydrogen bonds with complementary dG or dA residues. The minor groove O2 carbonyl in each derivative is replaced by a fluorine or a methyl group. The key carbon−carbon bond connecting the heterocycle to the carbohydrate is formed using a Heck-type