title: 2,3-Didehydro-2-deoxysialic acids structurally varied at C-5 and their behaviour towards the sialidase from Vibrio cholerae.
abstract: 2,3-Didehydro-2-deoxy-N-trifluoroacetylneuraminic acid (5-trifluoroacetyl-Neu2en) (3) has been synthesised from Neu5Ac2en (1) by hydrazinolysis, to give Neu2en (2), followed by N-trifluoroacetylation. 2,3-Didehydro-2,3-dideoxy-D-glycero-D-galacto-2-nonulopyranoson ic acid (Kdn2en, 8) and 5-azido-2,3-didehydro-2,3,5-trideoxy-D-glycero-D-galacto-2-nonu lopyranosonic acid (5-azido-5-deoxy-Kdn2en, 9) have been prepared from the acetylated methyl esters of Kdn (4) and 5-azido-5-deoxy-Kdn (5) via Zemplén saponification. The behaviour of the above 2,3-didehydro-2-deoxysialic acids towards Vibrio cholerae sialidase has been investigated.
authors.affiliation: Institut für Organische Chemie, Universität Wien, Austria.
authors.forename: E
authors.initials: E
authors.lastname: Schreiner
authors.forename: E
authors.initials: E
authors.lastname: Zbiral
authors.forename: R G
authors.initials: RG
authors.lastname: Kleineidam
authors.forename: R
authors.initials: R
authors.lastname: Schauer
mesh_terms: D007700:Kinetics; D019158:N-Acetylneuraminic Acid / Q000031:analogs & derivatives*; D009439:Neuraminidase / Q000037:antagonists & inhibitors*; D012794:Sialic Acids / Q000138:chemical synthesis / Q000737:chemistry / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D014734:Vibrio cholerae / Q000201:enzymology
chemical_list: D012794:Sialic Acids; C036137:2-deoxy-2,3-dehydro-N-acetylneuraminic acid; D009439:Neuraminidase; D019158:N-Acetylneuraminic Acid