Zn(II)-Stabilized Azo-Anion Radical-Catalyzed Dehydrogenative Synthesis of Olefins DOI
Subhasree Pal, Amit Kumar Guin,

Subhankar Khanra

и другие.

The Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 16, 2024

Herein, we describe a Zn-catalyzed atom-economical, inexpensive, and sustainable method for preparing broad spectrum of substituted olefins utilizing alcohols as the main precursor. Using Zn(II) complex [ZnLCl2] (1) redox-noninnocent ligand 2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline (L), various (E)-olefins were prepared in good yields by coupling with sulfones aryl cyanides under an inert atmosphere. Under aerial atmosphere, vinyl nitriles isolated up to 82% yield reacting benzyl presence 1. Control experiments mechanistic investigation indicate active involvement aryl-azo electron hydrogen reservoir, permitting 1 perform promising catalyst.

Язык: Английский

Heterogeneous Mn@CeO2 Catalyst for α-Alkylation of Ketones with Alcohols via Hydrogen-Borrowing Strategy DOI Creative Commons

Rajagopal Swaathy,

S. Karthikeyan

ACS Omega, Год журнала: 2025, Номер 10(9), С. 9649 - 9660

Опубликована: Фев. 24, 2025

Construction of a C-C bond via alkylation ketones with alcohol as the alkylating source by employing hydrogen-borrowing strategy is attracting significant attention and highly appealing due to its simplicity, cost-effectiveness, environmental benefits, fact that water only byproduct. The development heterogeneous catalysts based on nonprecious base metals progressing rapidly. Our newly disclosed manganese-doped cerium oxide nanocomposite (10 wt % Mn@CeO2) stands out cost-efficient air-stable catalyst, synthesized through straightforward coprecipitation method employed for α-alkylation primary alcohols strategy. X-ray diffraction (XRD) analysis confirms high crystallinity CeO2, while field emission scanning electron microscopy (FE-SEM) high-resolution transmission (HR-TEM) images reveal MnO2 nanoparticles, measuring 19 nm in size, uniformly decorated rod-shaped CeO2 which have size 33 nm. photoelectron spectroscopy (XPS) uncovers presence Mn4+ species embedded nanorods. Electron paramagnetic resonance (EPR) further indicates surface defects contribute impressive catalytic yield, ranges from 70 98% α-alkylated ketones. Thermogravimetric (TGA) demonstrates remarkable thermal stability maintaining up 800 °C. Additionally, inductively coupled plasma mass spectrometry (ICP-MS) no leaching Mn ions, emphasizing heterogeneity catalyst. Remarkably, 10 Mn@CeO2 recycled six cycles loss activity. This study underscores synergistic effect between metal redox pair key exceptional activity reactions, making promising catalyst sustainable efficient formation.

Язык: Английский

Процитировано

0
The recyclable non-metal acid-catalyzed ammination of benzyl alcohol DOI
Ming Zhong, Min Li, Guoliang Chen

и другие.

Sustainable Chemistry and Pharmacy, Год журнала: 2025, Номер 44, С. 101957 - 101957

Опубликована: Март 3, 2025

Язык: Английский

Процитировано

0
Zn(II)-Stabilized Azo-Anion Radical-Catalyzed Dehydrogenative Synthesis of Olefins DOI
Subhasree Pal, Amit Kumar Guin,

Subhankar Khanra

и другие.

The Journal of Organic Chemistry, Год журнала: 2024, Номер unknown

Опубликована: Дек. 16, 2024

Herein, we describe a Zn-catalyzed atom-economical, inexpensive, and sustainable method for preparing broad spectrum of substituted olefins utilizing alcohols as the main precursor. Using Zn(II) complex [ZnLCl2] (1) redox-noninnocent ligand 2-((4-chlorophenyl)diazenyl)-1,10-phenanthroline (L), various (E)-olefins were prepared in good yields by coupling with sulfones aryl cyanides under an inert atmosphere. Under aerial atmosphere, vinyl nitriles isolated up to 82% yield reacting benzyl presence 1. Control experiments mechanistic investigation indicate active involvement aryl-azo electron hydrogen reservoir, permitting 1 perform promising catalyst.

Язык: Английский

Процитировано

0