作者:Mauro Pascolutti、Paul D. Madge、Robin J. Thomson、Mark von Itzstein
DOI:10.1021/acs.joc.5b00992
日期:2015.8.7
Direct access to 3-O-functionalized 2-alpha-Nacetylneurarninides and their corresponding 2,3-dehydro-2-deoxy-N-acetylneuraminic acid derivatives is described. Initially, a stereoselective ring-opening of the key intermediate N-acetylneuraminic acid (Neu5Ac) 2,343-epoxide with an alcohol provided the 3-hydroxy alpha-glycoside. O-Allcylation of the C3 hydroxyl group generated novel 3-O-functionalized Neu5Ac derivatives that provided the corresponding unsaturated derivatives upon elimination.