Reactions of 2,3-O-isopropylidene derivatives of furanose sugars with organomagnesium and organolithium, nucleophiles
作者:Boualem Mekki、Gurdial Singh、Richard H. Wightman
DOI:10.1016/s0040-4039(00)93450-6
日期:1991.9
Reactions of 2,3-O-isopropylidene derivatives of furanosesugars with Grignard reagents afford stereoselectively products with an anti- (erythro-) relationship between the new chiral centre and that at C-2; the corresponding reactions with organolithium reagents are more variable stereochemically, but some predictive guidelines can be established.
Conformational Constraints: Nature Does It Best with Sialyl Lewis<sup>x</sup>
作者:Alexander Titz、Alberto Marra、Brian Cutting、Martin Smieško、George Papandreou、Alessandro Dondoni、Beat Ernst
DOI:10.1002/ejoc.201200744
日期:2012.10
tetrasaccharide sialylLewisx (sLex) leads to the recruitment of leukocytes from the vascular system to the site of injury. To facilitate the interaction under the shear stress conditions present in the blood vessel, the conformation of sLex is stabilized via lipophilic inter-residual contacts. sLex and two analogs were synthesized and evaluated for selectin binding, average conformation, and conformational dynamics