Solid-Phase Synthesis of a Branched Hexasaccharide Using a Highly Efficient Synthetic Strategy
作者:Fabien Roussel、Mohamed Takhi、Richard R. Schmidt
DOI:10.1021/jo016018p
日期:2001.12.1
The solid-phase synthesis of branched lacto-N-neohexaose derivative 1 occurring in human milk is described. The new building block of lactose 3 bearing the orthogonal temporary hydroxy protectinggroups 9-fluorenylmethyloxycarbonyl (Fmoc) and levulinoyl (Lev) has been prepared. Its use, together with that of lactosamine donor 4, glucosamine donor 5, and O-galactosyl trichloroacetimidate 6, has enabled