Supported Nickel Nanoparticles as Catalyst in Direct sp3 C–H Alkylation of 9H‐Fluorene Using Alcohols as Alkylating Agent DOI Creative Commons
Raju Dey,

M. Vageesh,

Harsh Joshi

et al.

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract Herein, we report an inexpensive first‐row transition metal Ni heterogeneous catalytic system for the C sp 3 ‐mono alkylation of fluorene using alcohols as alkylating agents via borrowing hydrogen strategy. The protocol displayed versatility with high yields desired products various types primary alcohols, including aryl/hetero aryl methanols, and aliphatic agents. catalyst NPs@N−C was synthesized high‐temperature pyrolysis strategy, ZIF‐8 sacrificial template. characterized by XPS, HR‐TEM, HAADF‐STEM, XRD ICP‐MS. is stable even in air at room temperature, excellent activity could be recycled 5 times without appreciable loss its activity.

Language: Английский

Direct C−H Sulfuration: Synthesis of Disulfides, Dithiocarbamates, Xanthates, Thiocarbamates and Thiocarbonates DOI
Qiao Sun, Yuan Xu,

Liu Yang

et al.

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: 19(9)

Published: Feb. 29, 2024

Abstract In light of the important biological activities and widespread applications organic disulfides, dithiocarbamates, xanthates, thiocarbamates thiocarbonates, continual persuit efficient methods for their synthesis remains crucial. Traditionally, preparation such compounds heavily relied on intricate multi‐step syntheses use highly prefunctionalized starting materials. Over past two decades, direct sulfuration C−H bonds has evolved into a straightforward, atom‐ step‐economical method organosulfur compounds. This review aims to provide an up‐to‐date discussion disulfuration, dithiocarbamation, xanthylation, thiocarbamation thiocarbonation, with special focus describing scopes mechanistic aspects. Moreover, synthetic limitations some these methodologies, along key unsolved challenges be addressed in future are also discussed. The majority examples covered this accomplished via metal‐free, photochemical or electrochemical approaches, which alignment overraching objectives green sustainable chemistry. comprehensive consolidate recent advancements, providing valuable insights dynamic landscape strategies crucial classes

Language: Английский

Citations

4
Heterogeneous Mn@CeO2 Catalyst for α-Alkylation of Ketones with Alcohols via Hydrogen-Borrowing Strategy DOI Creative Commons

Rajagopal Swaathy,

S. Karthikeyan

ACS Omega, Journal Year: 2025, Volume and Issue: 10(9), P. 9649 - 9660

Published: Feb. 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.

Language: Английский

Citations

0
Multicomponent synthesis via acceptorless alcohol dehydrogenation: an easy access to tri-substituted pyridines DOI Creative Commons

P. Hima,

M. Vageesh,

Raju Dey

et al.

RSC Advances, Journal Year: 2024, Volume and Issue: 14(15), P. 10761 - 10767

Published: Jan. 1, 2024

The multicomponent synthesis of 2,4,6-trisubstituted pyridine via acceptorless alcohol dehydrogenation using ammonium acetate as a nitrogen source catalyzed by hydroxyapatite-supported palladium nanoparticles heterogeneous catalyst.

Language: Английский

Citations

3
Fe SAC on Nitrogen‐Doped Carbon: An Efficient Catalyst for S‐Alkylation of Dithiocarbamates via Borrowing Hydrogen Strategy DOI Creative Commons

M. Vageesh,

P. Hima,

P. A. Bhobe

et al.

Asian Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: 13(5)

Published: March 7, 2024

Abstract Herein we report, the synthesis of single‐atom iron on nitrogen‐doped carbon as a catalyst for direct formation C sp3 −S bond via borrowing hydrogen strategy using alcohols alkylating agent. The was synthesized by encapsulating ferrocene within ZIF‐8 framework, followed pyrolysis and characterized precisely FE‐SEM, HR‐TEM, XPS, Raman, XRD EXAFS. is robust, displayed an excellent reactivity in reaction could be recycled five times without any appreciable loss activity.

Language: Английский

Citations

2
Acceptorless dehydrogenation under neat reaction conditions: Synthesis of 2-aryl/alkyl quinazolinones using supported Ni NPs as catalyst DOI

M. Vageesh,

Omkar Patil,

Raju Dey

et al.

Synlett, Journal Year: 2024, Volume and Issue: 35(20), P. 2496 - 2502

Published: Aug. 15, 2024

Abstract We report here a Ni-NPs-catalyzed one-pot synthesis of 2-alkyl/aryl quinazolinone motifs via acceptorless dehydrogenation alcohol, condensation an aldehyde intermediate with 2-aminobenzamide, followed by second the cyclized intermediate. The protocol is atom-economical and require earth-abundant Ni as catalyst. present involves annulation 2-aminobenzamide various types primary alcohols, including aryl/heteroaryl methanol, aliphatic produces high yields desired products under neat conditions. catalyst was synthesized high-temperature pyrolysis strategy, using ZIF-8 sacrificial template. NPs@N-C characterized XPS, HR-TEM, HAADF-STEM, XRD, ICP-MS. stable even in air at room temperature displayed excellent activity dehydrogenative coupling quinazolinones could be recycled five times without appreciable loss its activity.

Language: Английский

Citations

1
Facile access to S-aryl/alkyl dithiocarbamates through three-component coupling involving CS2 under metal-free conditions DOI
Linlin Xu,

Si-Ran Wang,

Jiaqi Sun

et al.

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: 22(37), P. 7702 - 7706

Published: Jan. 1, 2024

The development of facile and convenient atom-economical methods for the preparation organosulfur compounds from CS

Language: Английский

Citations

0
Supported Nickel Nanoparticles as Catalyst in Direct sp3 C–H Alkylation of 9H‐Fluorene Using Alcohols as Alkylating Agent DOI Creative Commons
Raju Dey,

M. Vageesh,

Harsh Joshi

et al.

Chemistry - An Asian Journal, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Abstract Herein, we report an inexpensive first‐row transition metal Ni heterogeneous catalytic system for the C sp 3 ‐mono alkylation of fluorene using alcohols as alkylating agents via borrowing hydrogen strategy. The protocol displayed versatility with high yields desired products various types primary alcohols, including aryl/hetero aryl methanols, and aliphatic agents. catalyst NPs@N−C was synthesized high‐temperature pyrolysis strategy, ZIF‐8 sacrificial template. characterized by XPS, HR‐TEM, HAADF‐STEM, XRD ICP‐MS. is stable even in air at room temperature, excellent activity could be recycled 5 times without appreciable loss its activity.

Language: Английский

Citations

0