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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Highly crystalline K-intercalated Se/C: an easily accessible mesoporous material catalyzing the epoxidation of β-ionone

Catalysis Science & Technology, Год журнала: 2022, Номер 12(7), С. 2241 - 2247

Опубликована: Янв. 1, 2022

Highly crystalline K-intercalated Se/C was fabricated by calcining methylselenized glucose with KBr being followed the subsequent water washing. It could catalyze selective oxidation reaction of β-ionone using O 2 as mild oxidant.

Язык: Английский

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Synthesis of β-Arylseleno Sulfoximines: A Metal-Free Three-Component Reaction Mediated by Tetrabutylammonium Tribromide

The Journal of Organic Chemistry, Год журнала: 2022, Номер 87(16), С. 10684 - 10697

Опубликована: Авг. 8, 2022

A tetrabutylammonium tribromide-mediated three-component reaction of alkenes, diselenides, and sulfoximines has been established herein, providing direct metal-free access to diverse β-arylseleno sulfoximine derivatives. This regioselective sulfoximido-selenization protocol proceeds efficiently under mild ambient conditions with generally good yields. strategy is featured by step atom economy, practicability, a broad substrate scope, gram-scale synthesis.

Язык: Английский

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Transition Metal‐free Selenium‐mediated Aryl Amines via Reduction of Nitroarenes

ChemSusChem, Год журнала: 2023, Номер 16(15)

Опубликована: Март 27, 2023

A scalable and operationally simple on water seleno-mediated reduction of nitroarenes to the respective aryl amines with NaBH4 is described. The reaction proceeds under transition metal-free conditions promoted by formation Na2 Se, which effective reducing agent involved in mechanism. This mechanistic information enabled development a mild -free protocol for selective nitro derivatives bearing labile moieties, including nitrocarbonyl compounds. selenium-containing aqueous phase can be successfully reused up four cycles, thus further improving efficiency disclosed.

Язык: Английский

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Synthesis of pyrimidine ligand and its mononuclear metal(II)/(III) complexes: Spectroscopic characterization, thermal, DFT, molecular docking, antimicrobial and anticancer studies

Inorganic Chemistry Communications, Год журнала: 2023, Номер 155, С. 110989 - 110989

Опубликована: Июль 1, 2023

Язык: Английский

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Magnetic Se/Fe/PCN-Catalyzed Oxidative Cracking Alkenes in O₂

Chinese Journal of Organic Chemistry, Год журнала: 2022, Номер 42(6), С. 1849 - 1849

Опубликована: Янв. 1, 2022

Oxidative cracking reaction of alkenes is applied not only in the synthesis carbonyl compounds, but also biomass conversion and degradation organic pollutants.It an chemical with potential industrial application value.Developing a suitable catalyst to promote using molecular oxygen as cheap safe oxidant under mild conditions meaningful research topic interdisciplinary field chemistry material chemistry.In this work, Se/Fe/PCN was designed prepared.The experimental results showed that excellent catalytic activity for oxidative styrene derivatives.Notably, selectivity good, aldehydes product could reach 70%～90%.The magnetically separable, be reused next turn reaction.

Язык: Английский

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Synthesis of Chalcogenylchromenes through Cyclization of Propargylic Aryl Ethers

The Journal of Organic Chemistry, Год журнала: 2022, Номер 87(22), С. 15050 - 15060

Опубликована: Окт. 27, 2022

We describe here for the first time synthesis of 2-(chalcogenyl)-3H-benzo[f]chromenes and new 3-(phenylselanyl)-2H-chromenes by radical or electrophilic cyclization propargylic aryl ethers in presence diorganyl diselenides ditellurides using Oxone as a green oxidant acetonitrile solvent sealed tube at 100 °C. In this study, thirty-one chalcogenylchromenes with broad substrate scope were prepared moderate to excellent yields (50-98%), including compounds derived from natural products.

Язык: Английский

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Photocatalytic Aerobic Cyclization of N‐Propargylamides Enabled by Selenium‐π‐Acid Catalysis

Chemistry - A European Journal, Год журнала: 2023, Номер 29(35)

Опубликована: Март 15, 2023

A dual catalytic approach combining photocatalyst and selenium-π-acid synergy has been used to cyclized of N-propargylamides. This method offers readily access oxazole aldehydes under chemical oxidant-free conditions with low catalyst loadings, where air acts as a terminal gratuitous oxidant. The reaction is demonstrated range substrates, including aryl alkyl propargyl amides, in the late-stage functionalization several amide-containing drug molecules. Mechanistic studies suggest that acridinium able oxidize diselenide generate singlet oxygen (1 O2 ), which responsible for this transformation.

Язык: Английский

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Selective Epoxidation of β-Ionone Catalyzed by Iron-Doped Se/C

Chinese Journal of Organic Chemistry, Год журнала: 2022, Номер 42(11), С. 3890 - 3890

Опубликована: Янв. 1, 2022

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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