Double Catalytic Activity Unveiled: Synthesis, Characterization, and Catalytic Applications of Iridium Complexes in Transfer Hydrogenation and Photomediated Transformations

ACS Catalysis, Год журнала: 2024, Номер 14(9), С. 6413 - 6422

Опубликована: Апрель 11, 2024

Iridium complexes have been demonstrated to be highly active catalysts for a wide variety of transformations. Their unique photophysical and photochemical properties render them as one the most established photocatalysts. Moreover, iridium are widely acknowledged their efficiency in transfer hydrogenation reactions. However, development able promote both traditional organometallic catalysis photocatalysis is scarce. Thus, design iridium-based still an area research. In this context, we targeted synthesis family Ir-Cp* systems explore (photo)catalytic applications. Here, describe synthesis, structural characterization, formula [IrCp*Cl(N^O)]. These applied with double catalytic function, carbonyl reduction different photomediated

Язык: Английский

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Access of arylmethanes via iridium-catalyzed deoxygenative cross-coupling of aryl ketones with anilines/phenols

Journal of Catalysis, Год журнала: 2024, Номер 433, С. 115492 - 115492

Опубликована: Апрель 11, 2024

Язык: Английский

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Visible-Light-Induced Imine Hydrogenation Catalyzed by Thioxanthone-TfOH Complex

The Journal of Organic Chemistry, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

Amino compounds are important molecules, commonly found in nature and widely applied industrial production. Recently, photocatalysis has been discovered as an efficient method to synthesize amino by promoting imine hydrogenation. In this work, a strategy of hydrogenation catalyzed 2e– consecutive photoinduced electron transfer (ConPET) process thioxanthone-TfOH complex (9-HTXTF) was thoroughly investigated with its reaction conditions optimized, substrate scope examined, mechanism elucidated, which provides for synthesizing compounds.

Язык: Английский

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Acid-base synergetic effect and thermal risk assessment on homogeneous catalytic production of γ-valerolactone with formic acid

Journal of Loss Prevention in the Process Industries, Год журнала: 2025, Номер unknown, С. 105636 - 105636

Опубликована: Март 1, 2025

Язык: Английский

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Heterogeneous Cobalt Nanocatalyst for Reductive Transformation of Nitroarenes to Aryl Amines Using Isopropanol as a Hydrogen Source

Industrial & Engineering Chemistry Research, Год журнала: 2025, Номер unknown

Опубликована: Март 19, 2025

Herein, we introduce an efficient catalytic transfer hydrogenation method using inexpensive, environmentally friendly, and readily available isopropyl alcohol as a hydrogen donor for selectively reducing diverse nitroarenes. The process employs cobalt-based nanocatalyst (Co–N/Al2O3), synthesized via simple impregnation cobalt nitrate, 1,10-phenanthroline, γ-Al2O3 precursors. This proves highly effective in producing wide range of aryl amines (35 examples), pharmaceutical intermediates (4 late-stage functional group transformations (1 example), with yields ranging from moderate to excellent (70–98%) across various scales. catalyst was characterized HR-TEM, powder XRD, XPS, H2-TPR, N2 adsorption–desorption, Raman spectroscopy, ICP-OES techniques. These analyses confirmed the formation Co3O4 nanoparticles. exceptional performance Co–N/Al2O3 is attributed its optimized textural, morphological, acidic properties, which are superior other catalysts. Mechanistic studies provided insights into formed during different stages reaction indirect route (condensation mechanism). recyclability were validated through experimental testing, demonstrating consistent efficiency over three consecutive cycles. sustainable offers promising alternative conventional processes that use molecular hydrogen.

Язык: Английский

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Room Temperature Transfer Hydrogenation of Aldehydes Using Methanol Catalyzed by Iridium(III) Pyridylidene-Indole Complex

Chemical Communications, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

An air- and moisture-stable (L)Ir( iii )Cp* catalyst with electron-rich pyridylidene–indole ligands enables efficient, selective transfer hydrogenation of aldehydes to alcohols using methanol at low temperatures (10–25 °C).

Язык: Английский

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Formate-Mediated C–C Coupling of Aryl/Vinyl Halides and Triflates: Carbonyl Arylation and Reductive Cross-Coupling

ACS Catalysis, Год журнала: 2025, Номер unknown, С. 8274 - 8283

Опубликована: Май 2, 2025

Язык: Английский

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Nickel‐Catalyzed Efficient Transfer Hydrogenation of Ketones

ChemistrySelect, Год журнала: 2024, Номер 9(19)

Опубликована: Май 16, 2024

Abstract An efficient and versatile synthesis of alcohols via transfer hydrogenation from ketones with isopropanol, utilizing [Ni(6,6′‐(OH) 2 ‐2,2′‐bpy)][Br ] under alkaline conditions, has been documented. It was noteworthy that many readily reducible or labile functional groups such as nitro, cyano, halide, within the same molecular framework, did not undergo any change standard reaction conditions. Furthermore, gram scale successfully carried out good yield using a common route only single purification by column chromatography.

Язык: Английский

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Unveiling proton-responsive sites and reaction mechanisms in formic acid dehydrogenation catalyzed by Cp*Ir(III)-Pyridylpyrrole complexes: A DFT study

International Journal of Hydrogen Energy, Год журнала: 2024, Номер 66, С. 148 - 155

Опубликована: Апрель 12, 2024

Язык: Английский

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En Route to Diastereopure Polycyclic γ‐Lactones by Iridium‐Catalyzed Hydride Transfer^†

Chinese Journal of Chemistry, Год журнала: 2024, Номер 42(23), С. 3047 - 3055

Опубликована: Июль 30, 2024

Comprehensive Summary The reductive lactonization strategy provides an efficient access to diastereoenriched polycyclic γ‐lactones. However, it is still a formidable challenge develop and versatile protocol with excellent levels of diastereocontrol. Herein, we provide highly diastereoselective route diastereopure bi‐ γ‐lactones, by means iridium‐catalyzed hydride transfer strategy. This method features high diastereocontrol, broad substrate scope, catalyst efficiency ( S / C = up 5000). Mechanistic studies suggest that the iridium formation might be rate‐determining step, step diastereo‐determining step. large steric hindrance species intramolecular hydrogen bonding are critically key diastereocontrol process. From perspectives configurational analysis Duniz angles attack, nature well rationalized. A more general empirical rule based on facial selectivity for explaining predicting stereochemistry also proposed.

Язык: Английский

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