Manganese-catalyzed hydrogenation, dehydrogenation, and hydroelementation reactions

Chemical Society Reviews, Год журнала: 2022, Номер 51(11), С. 4386 - 4464

Опубликована: Янв. 1, 2022

The emerging field of organometallic catalysis has shifted towards research on Earth-abundant transition metals due to their ready availability, economic advantage, and novel properties. In this case, manganese, the third most abundant transition-metal in Earth's crust, emerged as one leading competitors. Accordingly, a large number molecularly-defined Mn-complexes been synthesized employed for hydrogenation, dehydrogenation, hydroelementation reactions. regard, catalyst design is based three pillars, namely, metal-ligand bifunctionality, ligand hemilability, redox activity. Indeed, developed catalysts not only differ chelating atoms they possess but also working principles, thereby different turnover numbers product molecules. Hence, critical assessment molecularly defined manganese terms atoms, reaction conditions, mechanistic pathway, significant. Herein, we analyze complexes catalytic activity, versatility allow multiple transformations routes convert substrates target This article will be helpful get significant insight into design, aiding design.

Язык: Английский

---

Recent Advances in Reversible Liquid Organic Hydrogen Carrier Systems: From Hydrogen Carriers to Catalysts

Advanced Materials, Год журнала: 2024, Номер 36(37)

Опубликована: Фев. 20, 2024

Abstract Liquid organic hydrogen carriers (LOHCs) have gained significant attention for large‐scale storage due to their remarkable gravimetric capacity (HSC) and compatibility with existing oil gas transportation networks long‐distance transport. However, the practical application of reversible LOHC systems has been constrained by intrinsic thermodynamic properties performances associated catalysts in (de)hydrogenation cycles. To overcome these challenges, thermodynamically favored carriers, high‐performance catalysts, catalytic procedures need be developed. Here, advances recent years summarized, primarily centered on regular catalyzed homogeneous heterogeneous including dehydrogenative aromatization cycloalkanes arenes N ‐heterocyclics ‐heteroarenes, as well reverse hydrogenation processes. Furthermore, development metal complexes coupling, a new family based alcohols is described that can release H 2 under relatively mild conditions. Finally, views next steps challenges field technology are provided, emphasizing resources low‐cost technologies, scenarios.

Язык: Английский

---

Cobalt-catalyzed dehydrogenative functionalization of alcohols: Progress and future prospect

Coordination Chemistry Reviews, Год журнала: 2021, Номер 451, С. 214257 - 214257

Опубликована: Окт. 28, 2021

Язык: Английский

---

Cooperative approaches in catalytic hydrogenation and dehydrogenation

Chemical Society Reviews, Год журнала: 2022, Номер 51(6), С. 1881 - 1898

Опубликована: Янв. 1, 2022

This review uses catalytic hydrogenation and dehydrogenation processes as a platform to compare metal–ligand cooperativity metal–metal strategies in catalysis.

Язык: Английский

---

Advancement in photocatalytic acceptorless dehydrogenation reactions: Opportunity and challenges for sustainable catalysis

Coordination Chemistry Reviews, Год журнала: 2022, Номер 472, С. 214805 - 214805

Опубликована: Сен. 3, 2022

Язык: Английский

---

Well-Defined Phosphine-Free Manganese(II)-Complex-Catalyzed Synthesis of Quinolines, Pyrroles, and Pyridines

The Journal of Organic Chemistry, Год журнала: 2022, Номер 87(13), С. 8351 - 8367

Опубликована: Июнь 21, 2022

Herein, we report a simple, phosphine-free, and inexpensive catalytic system based on manganese(II) complex for synthesizing different important N-heterocycles such as quinolines, pyrroles, pyridines from amino alcohols ketones. Several control experiments, kinetic studies, DFT calculations were carried out to support the plausible reaction mechanism. We also detected two potential intermediates in cycle using ESI-MS analysis. Based these metal-ligand cooperative mechanism was proposed.

Язык: Английский

---

Cobalt-Catalyzed Acceptorless Dehydrogenation of Primary Amines to Nitriles

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(17), С. 11801 - 11810

Опубликована: Апрель 16, 2024

The direct double dehydrogenation from primary amines to nitriles without an oxidant or hydrogen acceptor is both intriguing and challenging. In this paper, we describe a non-noble metal catalyst capable of realizing such transformation with high efficiency. A cobalt-centered N,N-bidentate complex was designed employed as metal–ligand cooperative catalyst. Detailed kinetic studies, control experiments, DFT calculations revealed the crucial hydride transfer, proton evolution processes. Finally, tandem outer-sphere/inner-sphere mechanism proposed for through imine intermediate.

Язык: Английский

---

Single-Atom Fe-Catalyzed Acceptorless Dehydrogenative Coupling to Quinolines

Journal of the American Chemical Society, Год журнала: 2024, Номер 146(33), С. 23338 - 23347

Опубликована: Авг. 6, 2024

A single-atom iron catalyst was found to exhibit exceptional reactivity in acceptorless dehydrogenative coupling for quinoline synthesis, outperforming known homogeneous and nanocatalyst systems. Detailed characterizations, including aberration-corrected HAADF-STEM, XANES, EXAFS, jointly confirmed the presence of atomically dispersed centers. Various functionalized quinolines were efficiently synthesized from different amino alcohols a range ketones or alcohols. The achieved turnover number (TON) up 10

Язык: Английский

---

Redox-active ligands for chemical, electrochemical, and photochemical molecular conversions

Coordination Chemistry Reviews, Год журнала: 2022, Номер 473, С. 214804 - 214804

Опубликована: Сен. 16, 2022

Язык: Английский

---

Pt@MIL-101(Fe) for efficient visible light initiated coproduction of benzimidazoles and hydrogen from the reaction between o-Phenylenediamines and alcohols

Journal of Catalysis, Год журнала: 2022, Номер 410, С. 156 - 163

Опубликована: Апрель 23, 2022

Язык: Английский

---