Y(OTf)3 as a highly efficient catalyst in Ferrier Rearrangement for the synthesis of O- and S-2,3-unsaturated glycopyranosides

- Y(OTf)3 was used as a new, efficient catalyst for Type I Ferrier Rearrangement.
- Three kinds of glycals were used as substrates to react with O- or S-nucleophiles.
- Tri-benzyl-glucal reacted with PhOH to form 1-BnO glucoside as the sole product.