Semi-heterogeneous g-C₃N₄/NaI dual catalytic C–C bond formation under visible light

Green Chemistry, Год журнала: 2023, Номер 25(8), С. 3292 - 3296

Опубликована: Янв. 1, 2023

The semi-heterogeneous g-C 3 N 4 /NaI dual catalytic system driven C–C bond formation between quinoxalin-2(1 H )-ones and arylhydrazines under blue light irradiation is reported for the first time.

Язык: Английский

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Multifunctional nano-cellulose aerogel for efficient oil–water separation: Vital roles of magnetic exfoliated bentonite and polyethyleneimine

Separation and Purification Technology, Год журнала: 2023, Номер 314, С. 123557 - 123557

Опубликована: Март 10, 2023

Язык: Английский

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Tropos Diphenylmethane-Based Phosphine–Phosphoramidite Ligands: Design, Synthesis, and Application in Catalytic Asymmetric Hydrogenation

Organic Letters, Год журнала: 2025, Номер unknown

Опубликована: Янв. 9, 2025

A series of chiral hybrid diphosphorus ligands incorporating a conformationally flexible tropos diphenylmethane-based phosphoramidite unit have been developed and evaluated in the Rh-catalyzed asymmetric hydrogenation 2-(1-arylvinyl)anilides α-enamides, leading to up >99% yield 99% enantiomeric excess. Preliminary results from comparative studies showcased extraordinary catalytic performance these phosphine–phosphoramidite ligands, with competency essentially superior those well-established regular rigid backbone.

Язык: Английский

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A highly active and chemoselective homobimetallic ruthenium catalyst for one-pot reductive amination in water

Green Chemistry, Год журнала: 2023, Номер 26(3), С. 1610 - 1626

Опубликована: Дек. 13, 2023

A bimetallic Ru( ii ) complex efficiently catalyzes reductive amination of diverse substrates in water with the highest reported TONs and TOFs. Experimental DFT calculations point to a cooperative effect for increased efficiency at low catalyst loading (0.05 mol%).

Язык: Английский

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Transition-Metal-Catalyzed Asymmetric Reductive Amination and Amidation Cascade Reaction for the Synthesis of Piperazinones

Organic Letters, Год журнала: 2022, Номер 24(49), С. 9033 - 9037

Опубликована: Дек. 6, 2022

An efficient enantioselective reductive amination and amidation cascade reaction has been developed. Catalyzed by iridium or rhodium complexes with the help of sets additives, coupling simple alkyl diamines α-ketoesters occurs smoothly to afford chiral cyclic piperazinone products. For disubstituted monosubstituted diamine substrates, corresponding reactions proceed through distinctive types intermediates thus require different transition metals achieve high enantioselectivity, namely, for former latter. In this transformation, applied highly modular phosphoramidite-phosphine hybrid ligands displayed preeminent versatility tunability.

Язык: Английский

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Cobalt-Catalyzed Enantioselective Reductive Amination of Ketones with Hydrazides

Organic Letters, Год журнала: 2023, Номер 26(4), С. 769 - 774

Опубликована: Дек. 4, 2023

An efficient cobalt-catalyzed asymmetric reductive amination of ketones with hydrazides has been realized, directly producing valuable chiral hydrazines in high yields and enantioselectivities (up to 98% enantiomeric excess).

Язык: Английский

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Metal-free cascade reactions for one-pot tetrahydroquinoxaline construction through nitroarene reduction and imine hydrogenation with water

New Journal of Chemistry, Год журнала: 2024, Номер 48(14), С. 6103 - 6108

Опубликована: Янв. 1, 2024

A metal-free one-pot cascade process of imines with B 2 cat and water has been developed to construct dihydroquinoxalinones tetrahydroquinoxalines directly from readily available 2-nitroanilines or o -dinitrobenzenes α-ketoesters α-diketones.

Язык: Английский

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Sulfur-Promoted Access to 3-Arylquinoxalin-2-ones by Oxidative Coupling of o-Phenylenediamines with Arylacetates

Organic Letters, Год журнала: 2024, Номер 26(29), С. 6098 - 6102

Опубликована: Июль 15, 2024

We disclose the synthesis of 3-arylquinoxalin-2-ones from o-phenylenediamines and readily available arylacetates. The method harnesses selective oxidative property elemental sulfur in presence amine base catalyst DMSO. reactions are operationally simple tolerate a wide range functional groups.

Язык: Английский

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Recent advancements in visible-light-induced direct C(3)–H functionalization of quinoxalin-2(1H)-ones

Green Synthesis and Catalysis, Год журнала: 2024, Номер unknown

Опубликована: Дек. 1, 2024

Язык: Английский

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Access to enantioenriched dihydroquinoxalinones via Cu-catalyzed propargylic substitution

Organic Chemistry Frontiers, Год журнала: 2024, Номер 11(7), С. 1996 - 2001

Опубликована: Янв. 1, 2024

A Cu-catalyzed straightforward approach for the synthesis of otherwise synthetically challenging enantioenriched dihydroquinoxalinones from propargylic esters and commercially readily available o -phenylenediamines is developed.

Язык: Английский

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