ONO pincer type binuclear Pd(II) complex: Synthesis, crystal structure and catalytic utilization of the resulting organopalladium complex in catalytic copper-free Sonogashira coupling reaction
作者:Mojtaba Bagherzadeh、Narges-alsadat Mousavi、Maryam Zare、Sirous Jamali、Arkady Ellern、L. Keith Woo
DOI:10.1016/j.ica.2016.07.032
日期:2016.9
Abstract New binuclear palladium (II) complex featuring ONO pincer type hydrazone ligand was synthesized and characterized by spectroscopic and single-crystal XRD analysis. This complex showed excellent catalytic activity towards the copper-free Sonogashira cross coupling reaction. The main advantages over previous methodologies include low catalyst loading, less problematic reaction media (H2O–DMSO)
A library of acylhydrazone iron chelators was synthesized and tested for its ability to inhibit the growth of a chloroquine-resistant strain of Plasmodium falciparum. Some of these new compounds are significantly more active than desferrioxamine DFO, the iron chelator in widespread clinical use and also than the most effective chelators. (c) 2005 Elsevier Ltd. All rights reserved.
Vanadiumoxo–aroylhydrazone complexes: Synthesis, structure and DFT calculations
The aroylhydrazone Schiff base ligands (E)-N'-(2-hydroxybenzylidene)benzohydrazide = H(2)L(1), (E)-N'-(2-hydroxy-3-methoxybenzylidene)benzohydrazide = H(2)L(2) and = (E)-N'-(5-bromo-2-hydroxybenzylidene)benzohydrazide = H(2)L(3) gave the vanadium(V)oxo-aroylhydrazone complexes [V(V)OL(1)(OCH(3))(OHCH(3)] (1), [V(V)OL(2)(OCH(3))(OHCH(3)]center dot CH(3)OH (2) and [V(V)OL(3)(OCH(3))(OHCH(3)] (3) on reaction with vanadium(IV) oxide acetylacetonate. The complexes were characterized by spectroscopic methods in the solid state (IR) and in solution (UV-Vis, (1)H NMR). Single crystal X-ray analysis was performed with 3. In methanol solution six-coordinated V(V)OL(3)(OCH(3))(OHCH(3)) was formed. V(IV) was oxidized to V(V) by aerial oxygen in the synthesis. In the VO(5)N coordination sphere the alcohol oxygen lies trans to the oxo oxygen. The general V-O bond length order is oxo < methoxylato < phenoxidic < enolato < alcoholic. The complexes are mononuclear, but intermolecular O-H center dot center dot center dot-N hydrogen bonding affords a zigzag chain. OFT calculations on complex 3 reproduced the geometric parameters. IR and UV-Vis spectroscopic data well in a reasonable range. (C) 2010 Elsevier Ltd. All rights reserved.
Binuclear Schiff base copper(II) complexes: Syntheses, crystal structures, HSA interaction and anti-cancer properties