Glycocluster Synthesis by Native Chemical Ligation
作者:Thisbe Lindhorst、Johannes Wehner
DOI:10.1055/s-0030-1258157
日期:2010.9
Serine- and mannoside-derived thioesters and a mannosidic cysteine derivative were prepared to test native chemical ligation (NCL) for protecting-group-free synthesis of small glycopeptide clusters, which are valuable tools in the glycosciences. The glycopeptides and glycopeptide clusters, respectively, which were obtained via NCL, bear the potential for dimerization and other derivatization of the thiol functionality.
A Concise and Scalable Synthesis of High Enantiopurity (−)-<scp>d</scp>-<i>erythro</i>-Sphingosine Using Peptidyl Thiol Ester−Boronic Acid Cross-Coupling
作者:Hao Yang、Lanny S. Liebeskind
DOI:10.1021/ol070991m
日期:2007.8.1
A short and efficient synthesis of high enantiopurity (-)-D-erythro-sphingosine has been achieved in 71% yield over 6 steps from N-Boc-L-serine. The keysteps are high yield, racemization-free, palladium-catalyzed, copper(I)-mediated coupling of the thiophenyl ester of N-Boc-O-TBS L-serine with E-1-pentadecenyl boronic acid and the highly diastereoselective reduction of the resulting peptidyl ketone