Visible-Light-Induced Divergent C–H Esterification/Alkylation of Quinoxalin-2(1H)-ones with Aldehydes under Mild Conditions

Organic Letters, Год журнала: 2025, Номер 27(10), С. 2526 - 2531

Опубликована: Март 5, 2025

Herein, we introduce an efficient and straightforward strategy for the selective C-H esterification alkylation of quinoxalin-2(1H)-ones with aldehydes. A key feature our study is ability to perform both using different types The reaction system highly compatible a range aldehydes, yielding C3-esterified C3-alkylated products in moderate-to-good yields. applicability this approach further enhanced by its scalability through continuous-flow synthesis, late-stage modification significant molecules, product derivatization. Our mechanistic investigations reveal radical relay mechanism, triggered hydrogen atom transfer process.

Язык: Английский

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A concise synthesis of Se/Fe materials for catalytic oxidation reactions of anthracene and polyene

Chinese Chemical Letters, Год журнала: 2024, Номер unknown, С. 110036 - 110036

Опубликована: Май 1, 2024

Язык: Английский

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Se/ZrO₂-Catalyzed Oxidation of Phenol

Chinese Journal of Organic Chemistry, Год журнала: 2024, Номер 44(4), С. 1343 - 1343

Опубликована: Янв. 1, 2024

Язык: Английский

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Element transfer reaction theory: Scientific connotation and its applications in chemical industry

Chinese Chemical Letters, Год журнала: 2025, Номер unknown, С. 110924 - 110924

Опубликована: Фев. 1, 2025

Язык: Английский

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Polymer-Supported Selenium Affording Opportunities in Catalyst Design

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

Опубликована: Фев. 20, 2025

Polymer-supported selenium has been reported as a heterogeneous catalyst that is easily separated from the reaction system, thereby making recovery and reuse of more convenient. However, utilization polymer-supported in preparation catalysts not restricted to aforementioned technical advantages. Recent studies have shown small-molecule organoselenium significant performance differences, leading distinct mechanisms, which offer opportunities for development new organic reactions.

Язык: Английский

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Activation of Molecular Oxygen and Selective Oxidation with Metal Complexes

Accounts of Chemical Research, Год журнала: 2025, Номер unknown

Опубликована: Фев. 21, 2025

ConspectusSelective oxidation with molecular oxygen is one of the most appealing approaches to functionalization organic molecules and, yet at same time, challenging reactions facing synthesis due poor selectivity control. Molecular a green and inexpensive oxidant, producing water as only byproduct in oxidation. Not surprisingly, it has been used manufacturing many commodity chemicals industry. It also nature's choice oxidant drives variety critical life various other biologic processes. While past decades have witnessed great progress understanding, both structurally mechanistically, how nature exploits metalloenzymes, i.e., monooxygenases dioxygenases, tackle some reactions, e.g., methane methanol, there are small number well-defined, man-made metal complexes that reported enable selective compounds more relevant fine chemical pharmaceutical synthesis.In 10 years or so, our laboratories developed several transition shown they capable catalyzing under 1 atm O2. Thus, we an Fe(II)-bisimidazolidinyl-pyridine complex catalyzes oxygenation C–H bonds ethers concomitant release hydrogen gas instead water, when iron center replaced Fe(III), oxidative cleavage C═C olefins becomes feasible. To address low activity oxidizing less active olefins, Mn(II)-bipyridine complex, which aliphatic C–C diols, carboxyl units carboxylic acids visible light irradiation. Light necessary cleave off-cycle, inactive manganese dimer into catalytically Mn═O oxo species. Furthermore, found binuclear salicylate-bridged Cu(II) enables tetrahydroisoquinolines well bond cleavage, catalytic vitamin B1 analogue brought in, lactams takes place via carbene catalysis. Still further, readily accessible Rh(II)-terpyridine alcohols, being water-soluble, catalyst can be easily separated reused multiple times. In addition, recently unearthed simple protocol allows waste polystyrene depolymerized isolable, valuable chemicals. A cheap Brønsted acid acts catalyst, activating singlet state through complexation polymer irradiation, thereby depolymerizing polymer.

Язык: Английский

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Selective Oxidation of Tertiary Alcohols to Ketones via Synergistic Catalysis of (NH₄)₂Ce(NO₃)₆ and Trifluoroacetic Acid With Oxygen

cMat., Год журнала: 2025, Номер 2(1)

Опубликована: Март 1, 2025

ABSTRACT Tertiary alcohols are generally considered difficult to oxidize. However, in this work, it was found that catalyzed by (NH 4 ) 2 Ce(NO 3 6 (CAN) and the presence of catalytic trifluoroacetic acid (TFA), selective oxidative C‐C bond cleavage tertiary could be achieved using O flow produce carbonyl compounds. The benefits method include use simple inexpensive catalysts, as well environmentally friendly nature process. This research significantly broadens scope alcohol oxidation chemistry. Since reactions involving have potential applications key unit reaction certain industrial processes, finding holds significant promise for organic chemical engineering.

Язык: Английский

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An unexpected approach to enhance specific surface area and mesopore amount of polyaniline by Zn doping

Rare Metals, Год журнала: 2024, Номер 43(9), С. 4585 - 4594

Опубликована: Май 25, 2024

Язык: Английский

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Se/ZrO₂-Catalyzed Oxidative Polymerization of Aniline

Chinese Journal of Organic Chemistry, Год журнала: 2024, Номер 44(11), С. 3392 - 3392

Опубликована: Янв. 1, 2024

Язык: Английский

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Selenium and Alzheimer's disease

Chinese Chemical Letters, Год журнала: 2024, Номер unknown, С. 110727 - 110727

Опубликована: Дек. 1, 2024

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