Hexaazatrinaphthalene-Based Covalent Triazine Framework-Supported Rhodium(III) Complex: A Recyclable Heterogeneous Catalyst for the Reductive Amination of Ketones to Primary Amines

Inorganic Chemistry, Год журнала: 2023, Номер 62(24), С. 9360 - 9368

Опубликована: Июнь 7, 2023

The development of efficient and recyclable heterogeneous catalysts is an important topic. Herein, a rhodium(III) complex Cp*Rh@HATN-CTF was synthesized by the coordinative immobilization [Cp*RhCl2]2 on hexaazatrinaphthalene-based covalent triazine framework. In presence (1 mo l% Rh), series primary amines could be obtained via reductive amination ketones in high yields. Moreover, catalytic activity well maintained during six runs. present system also applied for large scale preparation biologically active compound. It would facilitate CTF-supported transition metal sustainable chemistry.

Язык: Английский

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Imidazolium carboxylates boost Ru-catalyzed hydroaminomethylation of olefins with CO2

Chem Catalysis, Год журнала: 2023, Номер 3(11), С. 100787 - 100787

Опубликована: Окт. 20, 2023

Язык: Английский

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External Catalyst- and Additive-Free Photo-Oxidation of Aromatic Alcohols to Carboxylic Acids or Ketones Using Air/O2

Molecules, Год журнала: 2023, Номер 28(7), С. 3031 - 3031

Опубликована: Март 28, 2023

We present an environment-friendly and highly efficient method for the oxidation of aromatic alcohols to carboxylic acids or ketones in air via light irradiation under external catalyst-, additive-, base-free conditions. The photoreaction system exhibits a wide substrate scope potential large-scale applications. Most desired products are easily obtained recrystallization separation from low-boiling reaction medium acetone good yields, can be subsequent directly transformed without further purification.

Язык: Английский

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Iridium Nanoparticles on NiO as Heterogeneous Catalysts for Acceptorless Dehydrogenation of Primary Alcohols with Tunable Product Selectivity

ACS Applied Nano Materials, Год журнала: 2023, Номер 6(16), С. 14786 - 14797

Опубликована: Авг. 7, 2023

In this work, we introduced a nanostructured iridium catalyst supported on NiO (IrNP@NiO) for acceptorless dehydrogenative oxidation of primary alcohols. The was synthesized by simple wet chemical technique and characterized HR-TEM, SEM-EDX, powder diffraction XRD, XPS, ICP-AES analyses. HR-TEM analysis revealed the formation ultrasmall Ir nanoparticles with an average size 1–2 nm over surface. A range alcohols could selectively be converted to corresponding acids or carboxylates concomitant evolution 2 equiv H2 when reactions were performed in presence base. Interestingly, same base-free condition, keeping all other reaction variables same, aldehydes isolated as main products along 1 H2. Notably, our efficiently convert relatively challenging biomass-based alcohols, such furfuryl alcohol, piperonyl 1-adamantane ethanol, their products, which have tremendous biological well industrial significance. easily separated from mixture reused at least five runs without any significant drop activity. dehydrogenation strategy benzyl alcohol scalable up gram.

Язык: Английский

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Vapor-phase dehydrogenation of 3-methyl-2-butanol over silica-supported Cu-catalyst prepared by mannitol-assisted impregnation

Bulletin of the Chemical Society of Japan, Год журнала: 2024, Номер 97(3)

Опубликована: Янв. 10, 2024

Abstract Silica-supported Cu (Cu/SiO2) prepared by using an organic additive-assisted impregnation method was employed as a catalyst for the dehydrogenation of 3-methyl-2-butanol (3M2BO) to 3-methyl-2-butanone (methyl isopropyl ketone, MIPK). The utilization additives, especially mannitol, during protocol has led generation Cu/SiO2 containing highly dispersed nanoparticles, i.e. high surface area (SACu). These properties contributed activity mannitol-assisted catalyst, in which limited only equilibrium nature reaction. proportional relationship between formation rate MIPK with SACu confirmed benefits additives. In addition, improvement mannitol gave negligible side product originating from dehydration 3M2BO; thus, yield 99.5% achieved even at 300 °C.

Язык: Английский

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Synthesis of Imines from the Coupling Reaction of Alcohols and Amines Catalyzed by Phosphine Free Cobalt(II) Complexes

Organic & Biomolecular Chemistry, Год журнала: 2024, Номер 22(22), С. 4528 - 4535

Опубликована: Янв. 1, 2024

Phosphine-free, air stable cobalt( ii ) based complexes consisting of imino phenol ligands were synthesized and utilized as catalysts in the coupling reaction alcohols with amines into imines following an acceptorless dehydrogenative pathway.

Язык: Английский

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Controlled incorporation of Zn into nitrogen-doped porous carbon boosts the alcohol dehydrogenation to carboxylic acids

Materials Today Chemistry, Год журнала: 2024, Номер 40, С. 102221 - 102221

Опубликована: Июль 26, 2024

Язык: Английский

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Poly(2,2′-Bibenzimidazole)-Supported Ruthenium Complex: A Recyclable Heterogeneous Catalyst for the Redox Isomerization of Allylic Alcohols to Ketones

ACS Applied Polymer Materials, Год журнала: 2022, Номер 5(1), С. 700 - 710

Опубликована: Дек. 29, 2022

A metallopolymer, Ru(p-cymene)@poly(2,2′-BiBzlm), which is synthesized by the incorporation of [Ru(p-cymene)Cl]2 into poly(bibenzimidazoles), was proven to be a general and efficient catalyst for redox isomerization allylic alcohols ketones. Mechanistic experiments showed that this reaction in agreement with an intramolecular hydrogen shift. This also applied gram-scale synthesis biologically active molecule. Furthermore, could recycled five times without obvious decrease activity.

Язык: Английский

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Ni(OH)₂ nanoparticles as a recyclable catalyst in acceptorless dehydrogenation of alcohols to acids/acid salts under aerobic conditions

ChemistrySelect, Год журнала: 2023, Номер 8(13)

Опубликована: Апрель 4, 2023

Abstract We demonstrate herein the catalytic performance of unsupported Ni(OH) 2 nanoparticles towards dehydrogenation primary alcohols to corresponding acids under aerobic conditions in refluxing toluene. An assortment aromatic and aliphatic carboxylic acids/acids salts was prepared from moderate excellent yields. Interestingly, protocol can also be employed synthesize on a gram scale, demonstrating practical utility method. Mechanistic studies suggest that reaction proceeds through an acceptorless strategy follow both Cannizzaro dehydrogenative path. Broad substrate scope, operational simplicity, low cost, reusability are most interesting features current heterogeneous described herein.

Язык: Английский

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Magnetic core-shell composites accessed by coordination assembly boost catalytic CO2 valorization

CHINESE JOURNAL OF CATALYSIS (CHINESE VERSION), Год журнала: 2023, Номер 48, С. 258 - 266

Опубликована: Май 1, 2023

Язык: Английский

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