Modulating the water oxidation catalytic activity of iridium complexes by functionalizing the Cp*-ancillary ligand: hints on the nature of the active species
The present work describes the design and synthesis of a series of rhodium and iridium dimers [(eta(5)-ring)MCl](2)(mu(2)-Cl)(2) (where (eta(5)-ring)MCl = (eta(5)-Me4C5R)Rh(III)Cl or (eta(5)-Me4C5R)Ir(III)Cl) using a new and efficient 1 h procedure. Rhodium and iridium dimeric complexes were synthesized via a microwave reaction. The modified HMe4C5R (R = isopropyl, n-butyl, isobutyl, sec-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, phenyl, benzyl, phenethyl, cyclohexyl, and cyclopentyl) type ligands were synthesized by reaction of 2,3,4,S-tetramethylcyclopent-2-en-1-one with the respective Grignard reagent (RMgX), followed by elimination of water under acidic conditions to produce the tetramethyl(alkyl or aryl)cyclopentadienes in moderate to excellent yields (40-98%). Reaction of the HMe4C5R ligands with [M(COD)](mu(2)-Cl)(2) (M = Rh, Ir; COD = 1,S-cyclooctadiene) gave the dimeric complexes [(eta(5)-Me4C5R)MCl](2)(mu(2)-Cl)(2) in yields ranging from 47% to 96%. The derivatized dimers were tested for antimicrobial activity, showing activity against Mycobacterium smegmatis and improved activity with derivatized R groups against Staphylococcus aureus and MRSA 43300. The characterization of these complexes was completed by NMR spectroscopy, single-crystal X-ray diffraction, high-resolution mass spectrometry, and elemental analysis.
The present invention relates to novel iridium and/or rhodium containing complexes for use as a cytotoxic, such as an anti-cancer agent. There is also provided a method of preparing said compounds.
Synthesis, Characterization, and Antimicrobial Activity of Rh<sup>III</sup> and Ir<sup>III</sup> β-Diketonato Piano-Stool Compounds
作者:Christine M. DuChane、Loren C. Brown、Virginia S. Dozier、Joseph S. Merola
DOI:10.1021/acs.organomet.7b00742
日期:2018.2.26
IrIII half-sandwich compounds of the type [(η5-Cp*R)M(β-diketonato)Cl] were synthesized and characterized, including 17 X-ray crystallographic structures. In general, the complexes were synthesized in short reaction times and in good yield. The antimicrobial properties of these complexes were tested against a variety of microbes, and several complexes were found to have good activity against Mycobacterium
Synthesis, Characterization, and Antimicrobial Activity of Rh<sup>III</sup> and Ir<sup>III</sup> N-Heterocyclic Carbene Piano-Stool Complexes
作者:Chad M. Bernier、Christine M. DuChane、Justin S. Martinez、Joseph O. Falkinham、Joseph S. Merola
DOI:10.1021/acs.organomet.1c00166
日期:2021.6.14
and IrIII piano-stool complexes of the form [(η5-Cp*R)M(NHC)Cl2] was synthesized and characterized, including 12 X-ray crystallographic structures. The antimicrobial properties of these complexes were screened against a variety of microbes, with several achieving high activities, most notably against Mycobacterium smegmatis (MICs as low as 0.45 μM). In general, the Rh complexes were more potent than
合成并表征了一系列[(η 5 -Cp* R )M(NHC)Cl 2 ]形式的 Rh III和 Ir III钢琴-凳配合物,包括 12 个 X 射线晶体结构。这些复合物的抗菌特性针对多种微生物进行了筛选,其中几种实现了高活性,最显着的是针对耻垢分枝杆菌(MIC 低至 0.45 μM)。一般来说,Rh 复合物比它们的 Ir 类似物更有效,并且活性随着 Cp* R和 NHC 配体的疏水性而增加。