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
Facile Synthesis of 1,2-<i>trans</i>-Nitrophenyl-1-Thioglycopyranosides
作者:Hugues Driguez、Wieslaw Szeja
DOI:10.1055/s-1994-25704
日期:——
1,2-trans-2-Nitro-, 4-nitro- and 2,4-dinitrophenyl-1-thioglycopyranosides were synthesized in high yield by condensation of per-O-acetyl-1-thioglucose with the appropriate nitro- or dinitrofluorobenzene in the presence of potassium carbonate. The pseudothiourea precursor was also used under these coupling conditions. 1,2-trans-4-Nitrophenyl-1-thioglycosides derived from β-D-galactose, β-D-xylose, α-L-arabinose and maltose were also obtained in good yield.