Stereoselective synthesis of α- C-allyl-glycopyranosides
作者:Athanassios Giannis、Konrad Sandhoff
DOI:10.1016/s0040-4039(00)98529-0
日期:——
A simplified procedure for the synthesis of C-glycosides has been developed. Fully or partially acetylated glycopyranoses are reacted, in a single step, with allyltrimethylsilane in the presence of a Lewisacid. This method also offers the advantage that stereoselectivity can be induced by using appropriate solvents.
Preparative synthesis of C-(α-d-glucopyranosyl)-alkenes and -alkadienes: Diels-alder reaction
作者:Maria de Gracia Garcia Martin、Derek Horton
DOI:10.1016/0008-6215(89)85066-9
日期:1989.8
The reaction of 2,3,4,6-tetra-O-benzyl-1-O-(p-nitrobenzoyl)-alpha-D-glucopyranose with (E)-penta-2,4-dienyltrimethylsilane and boron trifluoride etherate in acetonitrile afforded stereoselectively (E)-5-(tetra-O-benzyl-alpha-D-glucopyranosyl)-1,3-pentadiene in good yield. The readily available penta-O-benzoyl-alpha-D-glucopyranose reacted with allyltrimethylsilane in the presence of boron trifluoride
Studies on the Stereoselective Synthesis of <i>C</i>-Allyl Glycosides
作者:Glenn J. McGarvey、Christopher A. LeClair、Bahar A. Schmidtmann
DOI:10.1021/ol801710s
日期:2008.11.6
An investigation was carried out to explore the use of sulfoxide donors as common precursors to stereoisomeric C-glycoconjugates of glycoprotein and glycolipid tumor antigens. A study focusing on the effects of reaction conditions and substrate structure on the stereoselectivity of allylation was carried out. Although conditions were realized to selectively afford alpha-allylation products in good to excellent yields, the search for conditions favoring beta-selectivity proved less successful.