A Simple Synthesis of Sugar Nucleoside Diphosphates by Chemical Coupling in Water
作者:Hidenori Tanaka、Yayoi Yoshimura、Malene R. Jørgensen、Jose A. Cuesta-Seijo、Ole Hindsgaul
DOI:10.1002/anie.201205433
日期:2012.11.12
easy: The new reagent “ImIm”, which is formed in situ in water, is shown to activate nucleoside 5′‐phosphates to their imidazolides, these can subsequently couple with sugar‐1‐phosphates; the whole procedure takes place in water. This truly simple method yields a crude product mixture that can be used directly as a source of donors for glycosyltransferase‐mediated oligsaccharide synthesis. In the scheme
Synthesis of α- and β-d-glucopyranuronate 1-phosphate and α-d-glucopyranuronate 1-fluoride: Intermediates in the synthesis of d-glucuronic acid from starch
作者:André Heeres、Henk A van Doren、Kees F Gotlieb、Ido P Bleeker
DOI:10.1016/s0008-6215(97)00030-x
日期:1997.4
The title uronates were prepared by 2,2,6,6-tetramethyl-1-piperidinyloxy (TEMPO) catalysed sodium hypochlorite oxidation of alpha- and beta-D-glucopyranosyl phosphate(alpha-/beta-Glc-1-P) and alpha-D-glucopyranosyl fluoride (alpha-Glc-1-F). Quantitative recovery of the TEMPO catalyst was achieved by azeotropic distillation of a small part of the reaction mixture, Also, a heterogeneous catalyst system was prepared by immobilisation of 4-oxo-tetramethyl-1-piperidinyloxy (OTEMPO) on amino-functionalized silica. The protected uronates were hydrolysed to yield D-glucuronate. Since alpha- and beta-Glc-1-P and alpha-Glc-1-F can be obtained from starch in one step, D-glucuronic acid is now available from starch in a convenient three-step sequence. (C) 1997 Elsevier Science Ltd.
Synthesis of β-d-glucopyranosyl-(1 → 4)-d-arabinose, β-d-glucopyranosyl-(1 → 4)-l-fucose and β-d-glucopyranosyl-(1 → 4)- d-altrose catalysed by cellobiose phosphorylase from Cellvibrio gilvus
beta-D-Glcp-(1-->4)-D-Arap, beta-D-Glcp-(1-->4)-L-Fucp, and beta-D-Glcp-(1-->4)-D-Altp were synthesised using a partially purified cellobiose phophorylase from Cellvibrio gilvus. The disaccharides were purified, and analysed by H-1 and C-13 NMR. (C) 1998 Elsevier Science Ltd.
Straathof, A. J. J.; Kieboom, A. P. G.; Bekkum, H. van, Recueil des Travaux Chimiques des Pays-Bas, 1985, vol. 104, p. 65 - 68
作者:Straathof, A. J. J.、Kieboom, A. P. G.、Bekkum, H. van