Improved synthesis of substituted 2,6-dioxabicyclo[3.1.1]heptanes: 1,3-anhydro-2,4,6-tri-O-benzyl-2,4,6-tri-O-p-bromobenzyl- and -2,4,6-tri-O-p-methylbenzyl-β-d-glucopyranose
Improved synthesis of substituted 2,6-dioxabicyclo[3.1.1]heptanes: 1,3-anhydro-2,4,6-tri-O-benzyl-2,4,6-tri-O-p-bromobenzyl- and -2,4,6-tri-O-p-methylbenzyl-β-d-glucopyranose
S-Thiazolinyl (STaz) Glycosides as Versatile Building Blocks for Convergent Selective, Chemoselective, and Orthogonal Oligosaccharide Synthesis
作者:Papapida Pornsuriyasak、Alexei V. Demchenko
DOI:10.1002/chem.200600262
日期:2006.8.25
In the aim of developing new procedures for efficient oligosaccharide assembly, a range of S-thiazolinyl (STaz) glycosides have been synthesized. These novel derivatives were evaluated against a variety of reaction conditions and were shown to be capable of being chemoselectively activated in the armed-disarmed fashion. Moreover, the S-thiazolinyl moiety exhibited a remarkable propensity for selective
4-(Pyridin-2-yl)thiazol-2-yl thioglycosides as bidentate ligands for oligosaccharide synthesis via temporary deactivation
作者:Papapida Pornsuriyasak、Nigam P. Rath、Alexei V. Demchenko
DOI:10.1039/b810569c
日期:——
This study focusses on a new concept for oligosaccharide synthesis based on 4-(pyridin-2-yl)thiazol-2-yl thioglycosides that can either act as effective glycosyl donors or can be deactivated by stable bidentate complexation with palladium(II) bromide.
A Novel Strategy for Oligosaccharide Synthesis via Temporarily Deactivated <i>S</i>-Thiazolyl Glycosides as Glycosyl Acceptors
作者:Papapida Pornsuriyasak、Umesh B. Gangadharmath、Nigam P. Rath、Alexei V. Demchenko
DOI:10.1021/ol048043y
日期:2004.11.1
activation of the S-thiazolyl (STaz) moiety of a glycosyl donor over the temporarily deactivated glycosylacceptor, bearing the same anomeric group, has been developed. This deactivation is achieved by engaging of the STaz moiety of the glycosylacceptor into a stable palladium(II) complex. Therefore, obtained disaccharides are then released from the complex by simple ligand exchange. [reaction: see text]