N-heterocyclic carbene (NHC) copper complexes supported by calix[4]arene is reported. Mono-substituted calix[4]arene was prepared through conventional procedures, followed by the attachment of an imidazolyl group to create the precursor of NHC ligands. Alkylation with two alkyl bromides followed by metalation resulted in fully characterized original complexes. The X-ray structure showed an “out” conformation
Rigidified Compounds for Modulating Heparanase Activity
申请人:Gelder M. Van Joel
公开号:US20080039456A1
公开(公告)日:2008-02-14
Disclosed are novel rigidified compounds having a rhodanine-like residue and at least one aryl or heteroaryl residue linked to the rhodanine-like residue, whereby a core structure of these compounds, as defined in the specification, is characterized as having one or zero free-to-rotate bonds. Also disclosed are pharmaceutical compositions containing these rigidified compounds and uses thereof for modulating the activity of heparanase and hence in the treatment of heparanase-associated diseases and disorders, and uses thereof for modulating the activity of heparin-binding proteins and hence in the treatment of heparin-binding proteins-associated diseases and disorders as well as in the treatment of medical conditions that are at least partially treatable by rhodanine or a rhodanine analog.
Heteroleptic Bis(N-heterocyclic carbene)Copper(I) Complexes: Highly Efficient Systems for the [3+2] Cycloaddition of Azides and Alkynes
作者:Faïma Lazreg、Alexandra M. Z. Slawin、Catherine S. J. Cazin
DOI:10.1021/om3006195
日期:2012.11.26
The first examples of heteroleptic bis-N-heterocyclic carbene (NHC) copper(I) complexes and a mixed NHC–phosphine Cu complex are reported. These complexes are easily synthesized from the reaction of [Cu(OH)(NHC)] with various imidazol(idin)ium or phosphonium tetrafluoroborate salts. These cationic heteroleptic bis-NHC Cu complexes are highly active systems for the azide–alkyne cycloaddition leading
This invention provides a process which comprises contacting, in a reaction zone, at least one organic azide, at least one alkyne, and at least one N-heterocyclic carbene copper compound in which the ligands are either (i) a halide and an N-heterocyclic carbene or (ii) two N-heterocyclic carbenes and a BF
4
−
or PF
6
−
anion, to form a 1,2,3-triazole in which at least the 1 and 4 positions each has a substituent. The N-heterocyclic carbene either an imidazol-2-ylidene in which the 1 and the 3 positions each has a substituent which has at least one carbon atom, or a 4,5-dihydro-imidazol-2-ylidene in which the 1 and the 3 positions each has a substituent which has at least one carbon atom.
Solution-Phase Parallel Synthesis of Ruxolitinib-Derived Janus Kinase Inhibitors via Copper-Catalyzed Azide–Alkyne Cycloaddition
作者:Matthias Gehringer、Michael Forster、Stefan A. Laufer
DOI:10.1021/co500122h
日期:2015.1.12
A solution-phaseparallelsynthesis of triazole-derived ruxolitinib analogues was developed in the current study. The method employs copper-catalyzed azide–alkyne cycloaddition to build up the central triazole template. Product isolation by precipitation and centrifugation is straightforward and yields high purity compounds suited for biological profiling. A simple protocol for accessing the terminal