A new look at acid catalyzed deacetylation of carbohydrates: A regioselective synthesis and reactivity of 2-O-acetyl aryl glycopyranosides
作者:Elena V. Stepanova、Marina O. Nagornaya、Victor D. Filimonov、Rashid R. Valiev、Maxim L. Belyanin、Anna K. Drozdova、Victor N. Cherepanov
DOI:10.1016/j.carres.2018.02.003
日期:2018.3
groups of per - acetylated aryl glycosides have different reactivity during the acidic deacetylation using HCl/EtOH in CHCl3, which leads to preferential deacetylation at O-3, O-4 and O-6. Thereby, the one-step preparation of 2-O-acetyl aryl glycosides with simple aglycon was accomplished for the first time. It was proved that the found reagent is to be general and unique for the preparation of series of
Application of Halide Molten Salts as Novel Reaction Media for O-Glycosidic Bond Formation
作者:Vineet Kumar、Ian Jamie Talisman、Sanjay V. Malhotra
DOI:10.1002/ejoc.201000188
日期:——
we have explored the application of halide molten salts as reaction media for O-glycosidic bond formation under basic conditions and mild heating. Eighteen different room-temperature ionic liquids and molten salts, representing four different classes of cations (i.e. imidazolium, pyridinium, pyrrolidinium and ammonium), were screened in the glycosidation reaction of p-nitrophenol with aceto-bromo-α-D-galactose