Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
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Synthesis of the Non Reducing End Oligosaccharides of Glycosphingolipids from Ascaris suum
Noriyasu Hada , Yuna Umeda, Hiromi Kumada, Yoshinori Shimazaki, Kimiaki Yamano, Frank Schweizer, Naohiro Oshima, Tadahiro Takeda, Fumiyuki Kiuchi
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Keywords: glycosphingolipid, Ascaris suum, host–parasite interaction, stereocontrolled synthesis, biotin probe
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2019 Volume 67 Issue 2 Pages 143-154

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Abstract

Stereocontrolled syntheses of biotin-labeled oligosaccharide portions containing the non reducing end oligosaccharides of glycosphingolipids from Ascaris suum have been accomplished. Galα1→3GalNAcβ1→OR (1), Galβ1→3Galα1→3GalNAcβ1→OR (2), Galβ1→6Galα1→3GalNAcβ1→OR (3), Galβ1→6(Galβ1→3)Galα1→3GalNAcβ1→OR (4) and GlcNAcβ1→6Galβ1→6(Galβ1→3)Galα1→3GalNAcβ1→OR (5) (R = biotinylated probe) were synthesized by stepwise condensation (1–4) and block synthesis (5) using 5-(methoxycarbonylpentyl) 2-O-benzoyl-3-O-2-napthylmethyl-4,6-O-di-tert-butylsilylene-α-D-galactopyranosyl-(1→3)-4,6-O-benzylidene-2-deoxy-2-phthalimido-β-D-galactopyranoside (12) as a common precursor. Compound 12 was converted into two kinds of glycosyl acceptors and was condensed with suitable galactosyl donors, respectively.

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© 2019 The Pharmaceutical Society of Japan
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