Iridium supported on porous polypyridine-oxadiazole as high-activity and recyclable catalyst for the borrowing hydrogen reaction

Green Chemistry, Год журнала: 2022, Номер 24(6), С. 2602 - 2612

Опубликована: Янв. 1, 2022

Porous polypyridine-oxadiazole supported iridium catalysts (PPO-Ir) revealed high catalytic activity for the reaction of dimethyl-6-aminouracil (including 1,3-dimethylbarbituric acid, 2-aminobenzylamine) with alcohols.

Язык: Английский

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Transition metal complexes of click-derived 1,2,3-triazoles as catalysts in various transformations: An overview and recent developments

Coordination Chemistry Reviews, Год журнала: 2023, Номер 493, С. 215317 - 215317

Опубликована: Июнь 28, 2023

Язык: Английский

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Merrifield resin-supported quinone as an efficient biomimetic catalyst for metal-free, base-free, chemoselective synthesis of 2,4,6-trisubstituted pyridines

Green Chemistry, Год журнала: 2019, Номер 21(20), С. 5683 - 5690

Опубликована: Янв. 1, 2019

Metal-free, base-free, biomimetic, and chemoselective synthesis of 2,4,6-trisubstituted pyridines was developed for the first time under mild conditions.

Язык: Английский

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Iron‐Catalyzed Borrowing Hydrogen C‐Alkylation of Oxindoles with Alcohols

ChemSusChem, Год журнала: 2019, Номер 12(11), С. 2345 - 2349

Опубликована: Апрель 8, 2019

A general and efficient iron-catalyzed C-alkylation of oxindoles has been developed. This borrowing hydrogen approach employing a (cyclopentadienone)iron carbonyl complex (2 mol %) exhibited broad reaction scope, allowing benzylic simple primary secondary aliphatic alcohols to be employed as alkylating agents. variety underwent selective mono-C3-alkylation in good-to-excellent isolated yields (28 examples, 50-92 % yield, 79 average yield).

Язык: Английский

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Unsymmetrical triazolyl-naphthyridinyl-pyridine bridged highly active copper complexes supported on reduced graphene oxide and their application in water

Green Chemistry, Год журнала: 2019, Номер 21(19), С. 5345 - 5351

Опубликована: Янв. 1, 2019

A clean method for the synthesis of functionalized quinolines in water with a recoverable copper catalyst was developed.

Язык: Английский

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Immobilization of manganese dioxide nanoparticles on modified poly 2,4-dichlorostyrene microspheres: a highly efficient and recyclable catalyst for borrowing hydrogen reactions

Organic Chemistry Frontiers, Год журнала: 2019, Номер 6(19), С. 3420 - 3427

Опубликована: Янв. 1, 2019

Modified poly 2,4-dichlorostyrene microspheres were designed and synthesized, proved to be an effective carrier synthesize supported manganese dioxide nanoparticles.

Язык: Английский

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Transfer Hydrogenation of Aldehydes and Ketones in Air with Methanol and Ethanol by an Air-Stable Ruthenium–Triazole Complex

ACS Sustainable Chemistry & Engineering, Год журнала: 2021, Номер 9(13), С. 4903 - 4914

Опубликована: Март 22, 2021

Coordination of 1,4-disubstituted 1,2,3-triazoles L1 and L2 with [(p-cymene)RuCl2]2 followed by dehydrochlorination in the presence a base resulted formation complexes 1 2, respectively. Both were tested for transfer hydrogenation aldehydes ketones air using ecologically benign cheap ethanol as hydrogen source catalytic amount base. Air-stable complex was proved to be an active catalyst wide variety aromatic aliphatic bearing various functionalities. Catalyst also effective carbonyls simplest primary alcohol, methanol, under aerobic conditions. Under present protocol, labile or reducible functionalities such nitro, cyano, ester groups tolerated. Good selectivity observed acyclic α,β-unsaturated carbonyls. However, this protocol not selective 2-cyclohexen-1-one both alkene keto moieties reduced. The hydrogenations are believed proceed via ruthenium-hydride intermediate. Finally, acetophenone isopropanol commonly used performed sustainable green credentials these protocols utilizing ethanol, compared help CHEM21 metrics toolkit.

Язык: Английский

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Access to Deuterated Unnatural α-Amino Acids and Peptides by Photochemical Acyl Radical Addition

Organic Letters, Год журнала: 2021, Номер 23(14), С. 5299 - 5304

Опубликована: Июнь 25, 2021

A visible-light-enabled, photocatalyst-free conjugate addition reaction of dehydroamino acids is disclosed. Employing 4-acyl-1,4-dihydropyridines as both a radical reservoir and reductant, various β-acyl α-amino their deuterated analogues were obtained in good results. Both late-stage peptide modification stereoselective synthesis chiral oxazolidinones are successfully achieved. The protocol characterized by mild conditions efficient derivatization, thus unlocking novel blueprint to access unnatural amino acid derivatives, important building blocks with potential application the peptidomimetic toolbox.

Язык: Английский

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Platform for 3-fluoro-3-hydroxyoxindoles: photocatalytic C–N cross-coupling and deaminative oxidation–fluorohydroxylation

Organic Chemistry Frontiers, Год журнала: 2024, Номер 11(10), С. 2727 - 2732

Опубликована: Янв. 1, 2024

A photocatalytic C–N cross-coupling and deaminative fluorinating strategy has been developed to afford 3-fluoro-3-hydroxyoxindoles with wide functionality tolerance good yields.

Язык: Английский

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Recent advances in the coordination chemistry of benzotriazole-based ligands

Coordination Chemistry Reviews, Год журнала: 2019, Номер 395, С. 193 - 229

Опубликована: Июнь 15, 2019

Язык: Английский

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