title: One-pot chemo-, regio-, and stereoselective double-differential glycosidation mediated by lanthanide triflates.
abstract: Nuanced activation of n-pentenyl, thioglycoside, and trichloroacetimidate donors by lanthanide salts coupled with donor/acceptor matching can simplify oligosaccharide assembly. Thus, a one-pot, double-differential glycosidation process can be designed, in which an n-pentenyl acceptor-diol is chemo- and regioselectively glycosidated by using an n-pentenyl ortho ester under the agency of Yb(OTf)(3)/NIS followed by in situ addition of a 2-O-acylated trichloroacetimidate or ethyl thioglycoside to effect stereoselective glycosidation at the remaining OH.
authors.affiliation: Natural Products and Glycotechnology Research Institute, Inc., 4118 Swarthmore Road, Durham, North Carolina 27707, USA.
authors.forename: K N
authors.initials: KN
authors.lastname: Jayaprakash
authors.forename: Bert
authors.initials: B
authors.lastname: Fraser-Reid
mesh_terms: D002236:Carbohydrate Conformation; D006027:Glycosides / Q000737:chemistry*; D028581:Lanthanoid Series Elements / Q000737:chemistry*
chemical_list: D006027:Glycosides; D028581:Lanthanoid Series Elements