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

Cobalt(III) Complexes of Pyridine-Functionalized Chelating NHC Ligands: Effective Catalysts for the Olefination of Alcohols Using Sulfones DOI

Misba Siddique,

Mehali Das,

Arnab Rit

et al.

Organometallics, Journal Year: 2024, Volume and Issue: 43(13), P. 1482 - 1489

Published: June 26, 2024

Several air-stable cobalt(III) complexes 1a-d featuring pyridine-functionalized NHC ligand systems were synthesized and completely characterized. These then explored as phosphine-free catalysts for the olefination of alcohols with sulfones, among studied here, benzimidazolylidene-supported 1b complex acetylacetonate (acac) a labile co-ligand was noted to be most active one, which also successful broad range sulfones providing diverse olefins. It is important mention that this first example such protocol catalyzed by cobalt. Furthermore, utility present demonstrated gram-scale reaction postsynthetic modifications obtained compounds. Finally, based on various control experiments including detection intermediates kinetic studies, plausible mechanism proposed.

Language: Английский

Citations

3
Synthesis of Quinazolinone Scaffolds via Zinc(II) Stabilized Amidyl Radical Promoted Deaminative Approach DOI

Subarna Manna,

Sangita Sahoo,

Arnab Rit

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(55), P. 7097 - 7100

Published: Jan. 1, 2024

Herein, we report a solely ligand centered redox controlled protocol, utilizing bench stable zinc compound, for the efficient coupling of

Language: Английский

Citations

3
Copper-Catalyzed C(sp3)–H Alkylation of Fluorene with Primary and Secondary Alcohols using Borrowing Hydrogen Method DOI
Ratnakar Saha, Suraj Kumar Maharana, Narayan Ch. Jana

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(74), P. 10144 - 10147

Published: Jan. 1, 2024

Despite the limited success of copper-catalyzed alkylations, (NNS)CuCl proved to be an effective catalyst for sp

Language: Английский

Citations

1
Redox-enabled cooperative catalysis by activating secondary alcohols using low-valent Zn complexes DOI

Arup Samanta,

Amit Chaubey,

Debjyoti Pal

et al.

Chemical Communications, Journal Year: 2024, Volume and Issue: 60(75), P. 10398 - 10401

Published: Jan. 1, 2024

Inspired by nature's redox management in bioinorganic systems, we developed various Zn-complexes to catalyze a radical-mediated borrowing hydrogen process for producing β-disubstituted ketones. A diverse range of secondary alcohols, including fatty terpenoids and steroid analogs, were successfully utilized the chemoselective functionalization Several organometallic control studies suggest that coordinatively unsaturated radical species operate as active catalysts promote alcohol activation initiate HAT process.

Language: Английский

Citations

1
Zn(II)-Stabilized Azo-Anion Radical-Catalyzed Dehydrogenative Synthesis of Olefins DOI
Subhasree Pal, Amit Kumar Guin,

Subhankar Khanra

et al.

The Journal of Organic Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 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.

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