Synthesis of β-d-GalNAc(4,6-diS)(1–4)[α-l-Fuc(2,4-diS)(1–3)]-β-d-GlcA, a novel trisaccharide unit of chondroitin sulfate with a fucose branch
摘要:
Novel glycosaminoglycans isolated from the body wall of sea cucumbers consist of chondroitin sulfates like polysaccharides. We have synthesized a representative repeating trisaccharide composed of a chondroitin backbone having a fucose (Fuc) branch at O-3 of glucuronic acid (GlcA), beta-D-GalNac(4,6-diS)(1-4)[alpha-L-Fuc(2,4-diS)(1-3)]-beta-D-GlcA, in a stereocontrolled manner. Regiospecific sulfation at 04,6 and O-2,4 of the N-acetylgalactosamine (GalNAc) and Fuc residues, respectively, was successfully achieved. (C) 2013 Elsevier Ltd. All rights reserved.