Construction of Fused Tetrahydroquinolines by Catalytic Hydride-Transfer-Initiated Tandem Functionalization of Quinolines

Organic Letters, Год журнала: 2022, Номер 24(16), С. 3048 - 3052

Опубликована: Апрель 15, 2022

Herein, we present a new annulation reaction of quinolinium salts with indoles and paraformaldehyde, which enables syn-diastereoselective construction vast range fused tetrahydroquinolines via ruthenium-catalyzed hydride-transfer-initiated tandem functionalization the quinoline skeleton. The developed transformation proceeds mild conditions, good substrate functional group compatibility, readily available feedstocks, operational simplicity.

Язык: Английский

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Polyaniline-Supported Tungsten-Catalyzed α-H Alkylation Reaction of Ketone with Alcohol

Organic Letters, Год журнала: 2023, Номер 25(43), С. 7928 - 7932

Опубликована: Окт. 23, 2023

α-H alkylation of carbonyls is a significant reaction in the pharmaceutical industry because it can directly form C–C bond an environmentally benign manner. Thus, developing novel catalyst for this hot and practical topic catalysis, organic synthesis, materials science. In paper, we found that polyaniline-supported tungsten could catalyze ketone with alcohol generating water as only byproduct. Polyaniline support key promoting catalytic activity tungsten, which relatively cheaper than traditionally employed noble metals. The occurred under mild conditions wide substrate scope. initial concentration was enhanced to 1 mol/L, while speed accelerated reduce time 6 h; these improvements significantly enhance production capacity. advantages make synthesis industrial purposes.

Язык: Английский

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Nitrogen-doped carbon supported nanocobalt for the synthesis of functionalized triazines via oxidative cleavage of biomass derived vicinal diols as carbon synthons

Journal of Catalysis, Год журнала: 2022, Номер 408, С. 227 - 235

Опубликована: Март 19, 2022

Язык: Английский

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Transition‐Metal‐Catalyzed Direct Substitution of Alcohols in Aqueous Media

European Journal of Organic Chemistry, Год журнала: 2023, Номер 26(29)

Опубликована: Июнь 14, 2023

Abstract The direct use of alcohols as the much greener and more sustainable alkylated reagents in substitution reactions is one emerging areas green chemisty. However, owing to poor leaving character OH group, not an easy thing. Transition metal (TM) catalysis such Pd‐catalyzed allylic/benzyl Ir‐catalyzed borrowing hydrogen provides efficient protocols for alcohols, however, organic solvent servely anhydrous conditions are generally required. In recent decade, TM‐catalyzed aqueous media was developed a alternative. this review, develpoments area summarized. activation mechanism emphatically discussed.

Язык: Английский

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A cascade catalytic system of photocatalytic oxidation based on Cu@PCN-222(Ni) and enzyme catalysis for the synthesis of chalcone compounds in one pot

Journal of Catalysis, Год журнала: 2022, Номер 415, С. 102 - 111

Опубликована: Окт. 12, 2022

Язык: Английский

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Au(III)/TPPMS-catalyzed Friedel–Crafts benzylation of deactivated N-alkylanilines in water

Organic & Biomolecular Chemistry, Год журнала: 2024, Номер 22(38), С. 7874 - 7879

Опубликована: Янв. 1, 2024

The Friedel-Crafts reaction of electronically deactivated anilines including those with strong electron-withdrawing NO

Язык: Английский

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Porous Organic Polymer Supported Nano Ruthenium Catalysts for Cascade Aromatization of Quinoxalin-2(1H)-one and C–H Annulation with Alkynes

Organic Letters, Год журнала: 2023, Номер 25(44), С. 7974 - 7978

Опубликована: Окт. 31, 2023

Selective C–H annulation with alkynes is one of the most useful tools to synthesize heterocycles. Herein, we developed novel porous organic polymers supported ruthenium (POPs-Ru) as highly efficient catalysts for cascade aromatization quinoxalin-2(1H)-one and alkynes. Both terminal internal were successfully transferred furo[2,3-b]quinoxaline derivatives good functional group tolerance high regioselectivity by using POPs-Ru catalysts. Furthermore, catalyst exhibited activity could be reused at least five times without obvious deactivation this coupling reaction. This study offers an important platform immobilization molecular metal functionalization.

Язык: Английский

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Facile access to 1,2-disubstituted benzimidazoles and 2,3-dihydro-1H-perimidines using a biogenically synthesized single phase δ-MnO₂ NP catalyst and its dye removal study

New Journal of Chemistry, Год журнала: 2023, Номер 48(3), С. 1327 - 1335

Опубликована: Дек. 8, 2023

The synthesis of single phase δ -MnO 2 NPs was carried out utilising an environmentally benign biogenic method. prepared catalyst utilized for benzimidazoles and dihydroperimidines the dye removal study with exceptional catalytic activity.

Язык: Английский

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Dehydrative amination of benzhydrols with electron-withdrawing group-substituted 2-aminopyridines utilizing Au(iii)/TPPMS catalyst system in water

Organic & Biomolecular Chemistry, Год журнала: 2022, Номер 20(20), С. 4183 - 4188

Опубликована: Янв. 1, 2022

We report a method for gold( iii )/TPPMS-catalyzed direct amination of benzhydols using 2-aminopyridines with poor nucleophilic character in water.

Язык: Английский

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High Active Palladium Composite and Catalytic Applications on the Synthesis of Substituted Aminopyridine Derivatives Through Borrowing Hydrogen Strategy

Catalysis Letters, Год журнала: 2022, Номер 153(8), С. 2378 - 2387

Опубликована: Сен. 11, 2022

Язык: Английский

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