Novel Affinity Ligands for Chromatography Using Combinatorial Chemistry
作者:Tor Regberg、Charlotta Lindquist、Ake Pilotti、Christel Ellstrom、Lars Fagerstam、Ann Eckersten、Yasuro Shinohara、Steven L. Gallion、Joseph C. Hogan
DOI:10.2174/138620711795222482
日期:2011.5.1
Spatially addressable combinatorial libraries were synthesized by solution phase chemistry and screened for binding to human serum albumin. Members of arylidene diamide libraries were among the best hits found, having submicromolar binding affinities. The results were analyzed by the frequency with which particular substituents appeared among the most potent compounds. After immobilization of the ligands either through the oxazolone or the amine substituent, characterization by surface plasmon resonance showed that ibuprofen affected the binding kinetics, but phenylbutazone did not. It is therefore likely that these compounds bind to Site 2 in sub domain IIIA of human serum albumin (HSA).
Stereoselective Synthesis of 1,3-Diaminotruxillic Acid Derivatives: An Advantageous Combination of CH-<i>ortho</i>
-Palladation and On-Flow [2+2]-Photocycloaddition in Microreactors
作者:Elena Serrano、Alberto Juan、Angel García-Montero、Tatiana Soler、Francisco Jiménez-Márquez、Carlos Cativiela、M. Victoria Gomez、Esteban P. Urriolabeitia
DOI:10.1002/chem.201503742
日期:2016.1.4
The stereoselective synthesis of ε‐isomers of dimethyl esters of 1,3‐diaminotruxillic acid in three steps is reported. The first step is the ortho‐palladation of (Z)‐2‐aryl‐4‐aryliden‐5(4H)‐oxazolones 1 to give dinuclear complexes 2 with bridging carboxylates. The reaction occurs through regioselective activation of the ortho‐CH bond of the 4‐arylidene ring in carboxylic acids. The second step is
Two organic-inorganic hybrid polyoxometalates, consist of 1-butyl-3-methylimidazolium salts of (W10O32)(4-) and (RW12O40)(3-) polyanions were prepared and characterized by thermal analysis, X-ray diffraction, FT-IR, diffuse reflectance UV-Vis spectroscopic methods and nitrogen absorption-desorption determination (BET). These heterogeneous catalysts were used for synthesis of azlactones by the reaction of aldehydes with hippuric acid and acetic anhydride under solvent-free conditions. These catalysts were reused several times without loss of their activities. (C) 2011 Elsevier B.V. All rights reserved.
A simple conversion of azlactones into indenones via H3PW12O40/Al2O3 catalyzed intramolecular Friedel–Crafts reaction
作者:Mahboubeh Rostami、Ahmad R. Khosropour、Valiollah Mirkhani、Majid Moghadam、Shahram Tangestaninejad、Iraj Mohammadpoor-Baltork
DOI:10.1016/j.tetlet.2011.10.120
日期:2011.12
A rapid and simple procedure for the synthesis of the indenone derivatives, N-(1-oxo-1H-inden-2-yl)benzamides, via intramolecular Friedel-Crafts (IFC) reaction of (Z)-4-arylidene-2-phenyl-5(4)-oxazolones (azlactones) catalyzed by H3PW12O40 supported on neutral alumina under microwave irradiation has been developed. The reaction is straightforward and allows easy isolation of the product. The catalyst could be re-used up to four times after simple filtration. (C) 2011 Elsevier Ltd. All rights reserved.