Chemical synthesis of 13C-labelled ganglioside Gb3 trisaccharide from [U-13C]-D-glucose
作者:Hiroki Shimizu、Jonathan M Brown、Steven W Homans、Robert A Field
DOI:10.1016/s0040-4020(98)00577-8
日期:1998.8
glycolipid binding domain of the toxin with its natural ligand, ganglioside Gb3 (Galα1 →4Galβ1 →4Glcβ1 →Cer), remain to be confirmed. To this end we now report the synthesis of the (2-trimethylsilyl)ethyl glycoside of the Gb3 trisaccharide in isotopically enriched form from [U-13C]-D-glucose.
Biosynthesis of isoxazolin-5-one and 3-nitropropanoic acid containing glucosides in juvenile Chrysomelina
作者:Tobias Becker、Kerstin Ploss、Wilhelm Boland
DOI:10.1039/c6ob00899b
日期:——
(3-NPA) ester 2 in Chrysomelina larvae. Both structural elements originate from sequestered plant-derived β-alanine or from propanoyl-CoA that is derived from the degradation of some essential amino acids, e.g. valine. β-Alanine is converted into 3-NPA and isoxazolinone 5 by consecutive oxidations of the amino group of β-Ala. Substituting the diphospho group of α-UDP-glucose with 5 generates the isoxazolin-5-one
C3 Epimerization of Glucose, via Regioselective Oxidation and Reduction
作者:Varsha R. Jumde、Niek N. H. M. Eisink、Martin D. Witte、Adriaan J. Minnaard
DOI:10.1021/acs.joc.6b02074
日期:2016.11.18
Palladium-catalyzedoxidation can single out the secondary hydroxyl group at C3 in glucose, circumventing the more readily accessible hydroxyl at C6 and the more reactive anomeric hydroxyl. Oxidation followed by reduction results in either allose or allitol, each a rare sugar that is important in biotechnology. Also, N-acetylglucosamine is selectively oxidized at C3. These results demonstrate that
The synthesis of novel hexa-13C-labelled glucosinolates from [13C6]-d-glucose
作者:Qingzhi Zhang、Tomas Lebl、Agnieszka Kulczynska、Nigel P. Botting
DOI:10.1016/j.tet.2009.04.043
日期:2009.6
An isotopically labelled building block, 2,3,4,6-tetra-O-acetyl-1-thio-beta-D-[C-13(6)]glucopyranose (4), is obtained from the commercially available [C-13(6)]-D-glucose. This hexa-C-13-labelled thioglucose can be employed to make any glucosinolate (8) for use as an internal standard for isotopic dilution LCMS analysis. Herein three typical glucosinolates in their hexa-C-13-labelled form: [glucose-C-13(6)]gluconasturtiin, [glucose-C-13(6)]sinigrin and [glucose-C-13(6)]glucoerucin are synthesised by coupling the isotopically labelled thioglucose (4) with the corresponding hydroximoyl chlorides followed by sulfation with pyridine sulfur trioxide and deacetylation with a catalytic amount of potassium methoxide, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
Syntheses of isotope-labeled SGLT2 inhibitor canagliflozin (JNJ-28431754)
作者:Ronghui Lin、David C. Hoerr、Larry E. Weaner、Rhys Salter
DOI:10.1002/jlcr.3542
日期:2017.11
(subtype 2 sodium-glucose transport protein) inhibitor approved for the treatment of type 2 diabetes. Herein, we report the synthesis of 13 C and 14 C-labeled canagliflozin. Stableisotope-labeled [13 C6 ]canagliflozin was synthesized in 4 steps starting from [13 C6 ]-labeled glucose. The [14 C]-Labeled canagliflozin was synthesized by incorporation of [14 C] into the benzylic position between the thiophene