An Efficient Method for the Stereoselective Synthesis of 1,2-cis- and 1,2-trans-Ribofuranosides from 1-Hydroxy Ribofuranose by the Use of Diphenyltin Sulfide and Trifluoromethanesulfonic Anhydride

1,2-trans-Ribofuranosides are stereoselectively synthesized in high yields directly from 1-hydroxy ribofuranose and trimethylsilylated nucleophiles by the use of diphenyltin sulfide and trifluoromethanesulfonic anhydride. Even further, in the coexistence of lithium perchlorate, 1,2-cis-ribofuranosides are prepared predominantly in high yields.