as ligands in copper-catalyzed azide and alkyne cycloaddition (CuAAC) reactions were studied. The compounds with a lower number of branches exhibit excellent gelation properties and can function as supramolecular gelators. The resulting gels were characterized using optical microcopy and atomic force microscopy. The glycoconjugates containing six branches showed significant catalytic activity for copper
report various multi-tier designer dendritic molecules that incorporate an aromaticcore and heterocyclic and peptide units. The 5-(azidomethyl)benzene-1,3-dicarbonyl unit was chosen as the scaffold as this unit allows two identical units and a reactive end to be incorporated, thus generating a dendron suitable for dendrimer synthesis. The design and synthesis of dendrimers with multi-tier architectures
作者:Yoann M. Chabre、Denis Giguère、Bertrand Blanchard、Jacques Rodrigue、Sylvain Rocheleau、Mathieu Neault、Subhash Rauthu、Alex Papadopoulos、Alexandre A. Arnold、Anne Imberty、René Roy
DOI:10.1002/chem.201003402
日期:2011.5.27
As part of ongoing activities toward the design of potent and selective ligands against galactoside‐binding proteins from animal, bacterial, and plant lectins, a systematic investigation involving the synthesis and binding evaluations of a series of original β‐C‐galactopyranoside mimetics is described. The multivalent presentation of partly optimized candidates on various dendritic scaffolds through
作为针对来自动物,细菌和植物凝集素的半乳糖苷结合蛋白的有效和选择性配体设计工作的一部分,对系统的研究进行了描述,该研究涉及一系列原始β- C-吡喃半乳糖苷模拟物的合成和结合评估。通过Cu I催化的叠氮化物-炔烃环加成反应(CuAAc),还实现了在各种树突状支架上部分优化的候选物的多价呈现。基于等温滴定量热法(ITC)的生物物理研究已经表明在低微摩尔范围内的解离常数为最佳优化单价缀合物(ķ d = 37μ中号)。因此,结果证实了稳定的C-半乳糖苷可能代表了致病性铜绿假单胞菌PA-IL凝集素(Lec A)的天然α-连接寡糖抑制剂的有效合成糖模拟物。对于三价,六价和九价衍生物,还观察到糖缀合物亲和力的惊人增强,其中最有力的解离常数低于500 n M,与β- D相比,亲和力增加了400倍。-Gal- Ø‐我用作参考。为了加深我们对识别过程中涉及的最佳糖模拟物结合模式的理解,已进行了分子建模研究,对
Carbohydrate triazoles and isoxazoles as inhibitors of galectins-1 and -3
作者:Denis Giguère、Ramesh Patnam、Marc-André Bellefleur、Christian St-Pierre、Sachiko Sato、René Roy
DOI:10.1039/b517529a
日期:——
Galactosides and lactosides bearing triazoles or isoxazoles, regiospecifically prepared by [1,3]-dipolar cycloadditions between alkynes, azides or nitrile oxides, provided specific galectin-1 and -3 inhibitors with potencies as low as 20 µM.