Ruthenium(III) chloride-catalyzed chemoselective synthesis of acetals from aldehydes
摘要:
A mild and chemoselective acetalization procedure for the protection of various aldehydes in the presence of ketones is described. (C) 2004 Elsevier Ltd. All rights reserved.
Synthesis of Benzaldehyde-Functionalized Glycans: A Novel Approach Towards Glyco-SAMs as a Tool for Surface Plasmon Resonance Studies
作者:Sebastian Kopitzki、Knud J. Jensen、Joachim Thiem
DOI:10.1002/chem.200902693
日期:——
In recent years the interest in tools for investigating carbohydrate–protein (CPI) and carbohydrate‐carbohydrate interactions (CCI) has increased significantly. For the investigation of CPI and CCI, several techniques employing different linking methods are available. Surfaceplasmonresonance (SPR) imaging is a most appropriate tool for analyzing the formation of self‐assembled monolayers (SAM) of
requirements for hydroxyl group arrangement in Lex head group surfaceplasmonresonance and gold nanoparticle techniques have shown to be powerful tools to investigate carbohydrate–carbohydrate interactions. Benzaldehyde-functionalizedglycans can be used for attachment to both gold nanoparticles and surfaceplasmonresonance sensor surfaces. Therefore, seven benzaldehyde equipped Lex analogs including
LewisX(Le x)基于抗原的碳水化合物与碳水化合物的相互作用是由金属离子的络合介导的。尽管有关Le x三糖头部基团(Galβ(1-4)[Fucα(1-3)] Glc N Ac)的参与羟基影响的理论研究可以提供有关该相互作用背后基本机理的基本信息,关于由Ca 2+络合介导的特定相互作用所需的羟基的取向和构型知之甚少。因此,需要非天然衍生物来提供有关Le x中羟基排列的要求的详细信息。头组表面等离振子共振和金纳米粒子技术已被证明是研究碳水化合物与碳水化合物相互作用的有力工具。苯甲醛官能化的聚糖可用于附着在金纳米颗粒和表面等离振子共振传感器表面上。因此,利用收敛方法合成了包括天然三糖在内的七个装备有苯甲醛的Le x类似物。通过表面等离振子共振实验将这些衍生物应用于正在进行的碳水化合物与碳水化合物的相互作用研究中,以证明有关Le x三糖中羟基排列的结构要求的理论假设。
Short Synthetic Route to Benzaldehyde-Functionalized Idose and Talose Derivatives by Acetoxonium Ion Rearrangements
作者:Sebastian Kopitzki、Joachim Thiem
DOI:10.1002/ejoc.201201648
日期:2013.7
(CCI) are mediated by complexation of metal ions. Angyal postulated on the requirements for hydroxy group arrangement in pyranoses to account for metal-ion complexation. These requirements are particularly well fulfilled in α-ido- and α-talopyranosides, whose ring hydroxy groups have all axial and axial-equatorial-axial configurations, respectively. Surface plasmon resonance (SPR) and gold-nanoparticle
Highly efficient triphenyl(3-sulfopropyl)phosphonium functionalized phosphotungstic acid on silica as a solid acid catalyst for selective mono-allylation of acetals
作者:Sumit B. Kamble、Suhas H. Shinde、Chandrashekhar V. Rode
DOI:10.1039/c5cy00531k
日期:——
A silica-supported zwitterion-functionalized phosphotungstic acid catalyst developed for the selective Hosomi–Sakurai reaction giving 93–99% yield of homoallyl ethers.
A toolset of functionalized porphyrins with different linker strategies for application in bioconjugation
作者:M. H. Staegemann、S. Gräfe、R. Haag、A. Wiehe
DOI:10.1039/c6ob01551d
日期:——
alkenyl, alkynyl, amino, azido, epoxide, hydroxyl, and maleimido groups have thus been synthesized. For the first time such functionalized porphyrins have been conjugated to hyperbranchedpolyglycerol (hPG) as a biocompatible carrier system for photodynamic therapy (PDT) using the copper(I)-catalyzed 1,3-dipolar cycloaddition (CuAAC). The photocytotoxicity of selected porphyrins as well as of the