Stereocontrolled Synthesis of β-<scp>d</scp>-Mannuronic Acid Esters: Synthesis of an Alginate Trisaccharide
作者:Leendert J. van den Bos、Jasper Dinkelaar、Herman S. Overkleeft、Gijsbert A. van der Marel
DOI:10.1021/ja064787q
日期:2006.10.1
A facile synthesis route toward beta-linked mannuronic acid oligomers using the corresponding 1-thiomannuronic acid esters in combination with the Ph2SO/Tf2O or NIS/TMSOTf reagent combinations is presented. The presence of the remotely attached carboxylic ester sufficiently influences the electronic environment to allow good to excellent beta-selectivities.