Synthesis of<scp>L</scp>-Altrose and Some Derivatives
作者:Nathalie Lunau、Chris Meier
DOI:10.1002/ejoc.201200938
日期:2012.11
A convenient approach to the chemical synthesis of L-altrose (1) and its 6-deoxy derivative 2 has been developed by starting from D-galactose (9) and D-fucose (10), respectively. The 5-epimerization by a Mitsunobu inversion of the open-chain D-hexoses was the key step for these routes. Furthermore, the conversion of 2 into peracetylated TDP-6-deoxy-α-L-altrose (3a) was achieved by the cycloSal approach
A divergent approach to the synthesis of iGb3 sugar and lipid analogues via a lactosyl 2-azido-sphingosine intermediate
作者:Janice M. H. Cheng、Emma M. Dangerfield、Mattie S. M. Timmer、Bridget L. Stocker
DOI:10.1039/c4ob00241e
日期:——
Isoglobotrihexosylceramide (iGb3, 1) is an immunomodulatory glycolipid that binds to CD1d and is presented to the T-cell receptor (TCR) of invariant natural killer T (iNKT) cells.
Synthesis of double-chain bis-sulfone neoglycolipids of the 2″-, 3″-, 4″-, and 6″-deoxyglobotrioses
作者:Zhang Zhiyuan、Göran Magnusson
DOI:10.1016/0008-6215(94)84006-7
日期:1994.9
Me3SiCH2CH2 2''-, 3''-, 4''-, and 6''-deoxyglobotriosides. Transformation of the protected Me3SiCH2CH2 globotriosides into the corresponding trichloroacetimidates proceeded, via the hemiacetals, in 91-96% over-all yield. Glycosylation of 3-(hexadecylsulfonyl-2-[hexadecylsulfonyl)methyl]propanol with the trichloroacetimidates, followed by removal of protecting groups, gave the title neoglycolipids.
Mirror-Image Carbohydrates: Synthesis of the Unnatural Enantiomer of a Blood Group Trisaccharide
作者:Fabien P. Boulineau、Alexander Wei
DOI:10.1021/jo035789l
日期:2004.5.1
pyranosides provide an expeditious entry into mirror-image oligosaccharides, as demonstrated in the synthesis of the unnaturalenantiomer of the H-type II blood group determinant trisaccharide (d-Fuc-(α1→2)-l-Gal-(β1→4)-l-GlcNAc-β-OMe). This work illustrates that d-glucose, a common starting material in the synthesis of naturally occurring carbohydrates, can also be used to prepare their mirror-image analogues