132807-48-8Relevant articles and documents
Protected-mode Synthesis of N-Linked Glycopeptides: Single-step Preparation of Building Blocks as Peracetyl Glycosylated NαFmoc Asparagine OPfp Esters
Christiansen-Brams, Ida,Meldal, Morten,Bock, Klaus
, p. 1461 - 1472 (2007/10/02)
The preparation of Nα-(fluoren-9-ylmethoxycarbonyl)asparagine pentafluorophenyl esters (Nα-Fmoc-Asn-OPfp) glycosylated with per-O-acetylated β-D-glucose, N-acetyl-β-D-glucosamine, β-D-mannose, 4-O-β-D-glucopyranosyl-β-D-glucose (cellobiose), 4-O-β-D-galactopyranosyl-β-D-glucose (lactose) and 4-O-α-D-glucopyranosyl-β-D-glucose (maltose) is described.The per-O-acetylated glycosylamines were treated selectively with the key compound Nα-Fmoc-Asp(Cl)-OPfp 2, to give, in a single step, the glycosylated building blocks.The acid chloride 2 was prepared in a quantitative one-pot reaction from commercially available Nα-Fmoc-Asp(OBut)-OPfp 1.The acid stability of the N-glycosidic linkage was investigated.The building block 7, containing a maltose moiety, was used in the synthesis of a glycosylated D-Ala1 Peptide-T amide analogue 14.CD spectra were recorded in 85 percent TFE.All compounds were fully characterized by (1)H and (13)C NMR spectroscopy.