A method for preparing hexose derivatives comprises the steps of providing a silylated hexose, treating the silylated hexose with a first carbonyl compound in the presence of a catalyst to form an ketalized hexose, treating the ketalized hexose with a second carbonyl compound followed by treating with a first reductant to form an etherized hexose, and converting the etherized hexose into a target hexose derivative, which can be 2-alcohol hexose, 3-alcohol hexose, 4-alcohol hexose, or a 6-alcohol hexose. In particular, the present invention can prepare the hexose derivatives with highly regioselective scheme to protect individual hydroxyls of monosaccharide units and install an orthogonal protecting group pattern in a one-pot manner
Immobilization of UDP-Galactose on an Amphiphilic Resin
作者:Jessica G. M. Bevan、Eva C. Lourenço、Miguel Chaves-Ferreira、João A. Rodrigues、M. Rita Ventura
DOI:10.1002/ejoc.201701620
日期:2018.2.21
Here we report the first example of resin‐bound nucleotide sugars: fluorinated UDP‐Galactose and UDP‐Galactose. This synthesis represents an efficient method to access resin‐bound nucleotide sugars in a modular approach that enables modifications of the sugar or nucleotide before conjugation.
Triethylamine-methanol mediated selective removal of oxophenylacetyl ester in saccharides
作者:Javeed Ur Rasool、Atul Kumar、Asif Ali、Qazi Naveed Ahmed
DOI:10.1039/d0ob02192j
日期:——
A highlyselective, mild, and efficient method for the cleavage of oxophenylacetyl ester protected saccharides was developed using triethylamine in methanol at room temperature. The reagent proved successful against different labile groups like acetal, ketal, and PMB and also generated good yields of the desired saccharides bearing lipid esters. Further, we also observed DBU in methanol as an alternative