A Cu(OTf)₂-Catalyzed Glycosylation with Glycosyl <i>ortho</i>-<i>N</i>-Phthalimidoylpropynyl Benzoates as Donors

Abstract

A Cu(OTf)₂-catalyzed glycosylation protocol using glycosyl <i>ortho</i>-<i>N</i>-phthalimidoylpropynyl benzoates (NPPBs) as donors was disclosed, which features an inexpensive copper catalyst, operationally convenient conditions, high to excellent yields, and a broad substrate scope. Mechanistic studies indicated an isochromen-4-yl copper(II) intermediate arising from the departure of the leaving group.