Optimizing Divalent Inhibitors of<i>Pseudomonas aeruginosa</i>Lectin LecA by Using A Rigid Spacer
作者:Francesca Pertici、Nico J. de Mol、Johan Kemmink、Roland J. Pieters
DOI:10.1002/chem.201303463
日期:2013.12.9
Rigid spacers: Optimal highly potent divalentligands of the P. aeruginosa lectinLecA have been prepared. The ligands consist of a rigid spacer derived from glucose–triazole units (see figure). Systematic variation of the number of spacer units and the aglycon linker led to a 7500‐fold enhancement in potency.
Synthesis of Sugar-Based Silica Gels by Copper-Catalysed Azide-Alkyne Cycloaddition via a Single-Step Azido-Activated Silica Intermediate and the Use of the Gels in Hydrophilic Interaction Chromatography
Novel sugar‐based silica gels were prepared by exploiting the copper‐catalysed azide–alkyne cycloaddition (CuAAC) of two different sugar alkynes, namely, ethynyl C‐galactoside 1 and propargyl O‐lactoside 2, with new single‐step azido‐activated silica gels. The fully characterised stationary phases were generally used for hydrophilic interaction chromatography (HILIC), with particular application in
Synthesis of rapamycin glycoconjugates via a CuAAC-based approach
作者:Lisa Moni、Alberto Marra、Jerauld S. Skotnicki、Frank E. Koehn、Magid Abou-Gharbia、Alessandro Dondoni
DOI:10.1016/j.tetlet.2013.10.026
日期:2013.12
The conversion of the C40 secondary hydroxyl group of rapamycin into the azido group was followed by copper catalyzed cycloaddition of the resulting azido-rapamcin with various unprotected propargyl O-and S-glycosides and a C-ethynyl derivative. This approach furnished a collection of triazole-bridged rapamycin glycoconjugates (14 examples) in 44-83% isolated yield. (C) 2013 Elsevier Ltd. All rights reserved.