Abstract
Syntheses of some sialic acid-containing nucleotide sugars are reported. The reaction of methyl [(2-hydroxy)ethyl 5-acetamido-4,7,8,9-tetra- O-acetyl-3,5-dideoxy- d- glycero-α- d- galacto-2-nonulopyranosid]onate ( 4) with various fully protected hydrogen phosphonates of nucleosides ( 5a–c) in the presence of 2,4,6-triisopropylbenzenesulfonyl chloride (TPSCl), gave, after oxidation and deprotection, the corresponding sialic acid-containing nucleotide sugar analogs ( 8a–c).
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