Cutting-edge technologies for the recovery of cobalt from different waste discards DOI
Satyabrata Si

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 365 - 391

Published: Nov. 15, 2024

Language: Английский

Cobalt-Catalyzed Enantioselective Dicarbofunctionalization of Acrylates DOI

Jiejun Li,

Yi Xu, Xiaolong Wan

et al.

ACS Catalysis, Journal Year: 2024, Volume and Issue: unknown, P. 15221 - 15236

Published: Oct. 2, 2024

Language: Английский

Citations

2
Cobalt-Hydride-Catalyzed Alkene-Carboxylate Transposition (ACT) of Allyl Carboxylates DOI
Gaoyuan Zhao,

Arman Khosravi,

Sahil Sharma

et al.

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(46), P. 31391 - 31399

Published: Nov. 12, 2024

The alkene-carboxylate transposition (ACT) of allyl carboxylates is one the most atom-economic and synthetically reliable transformations in organic chemistry, as are versatile synthetic intermediates. Classic ACT transformations, including [3,3]-sigmatropic rearrangement transition metal-catalyzed allylic rearrangement, typically yield 1,2-alkene/1,3-acyloxy shifted products through a two-electron process. However, position-altered to produce distinct 1,3-alkene/1,2-acyloxy remains elusive. Here, we report first cobalt-hydride-catalyzed carboxylates, enabling access these unprecedented via 1,2-radical migration (RaM) strategy. This transformation demonstrates broad functional group tolerance, suitable for late-stage modification complex molecules, amenable gram-scale synthesis. It also expands reaction profiles both cobalt catalysis. Preliminary experimental computational studies suggest mechanism involving metal-hydride hydrogen atom transfer (MHAT) 1,2-RaM expected serve basis development Co-H-catalyzed generating wide array valuable building blocks synthetic, medicinal, materials chemistry.

Language: Английский

Citations

2
Surface self-modification of TiO2 for enhanced photocatalytic toluene oxidation via photothermal effect DOI
Jinyu Li,

Sunzai Ke,

Jiayu Yi

et al.

Journal of Catalysis, Journal Year: 2024, Volume and Issue: 440, P. 115846 - 115846

Published: Nov. 13, 2024

Language: Английский

Citations

2
Synthesis and application of triptycene based oligomers for the stereoselective aldol reaction of isatin and ketones DOI
Meha Bhargava,

Dhiraj Rani,

Jyoti Agarwal

et al.

Molecular Catalysis, Journal Year: 2024, Volume and Issue: 568, P. 114462 - 114462

Published: Aug. 28, 2024

Language: Английский

Citations

1
The penetration depth of atomic radicals in tubes with catalytic surface properties DOI
Domen Paul, Miran Mozetič, Rok Zaplotnik

et al.

Plasma Science and Technology, Journal Year: 2024, Volume and Issue: 26(7), P. 075510 - 075510

Published: April 1, 2024

Abstract Catalysis of molecular radicals is often performed in interesting experimental configurations. One possible configuration tubular geometry. The are introduced into the tubes on one side, and stable molecules exhausted other side. penetration depth depends numerous parameters, so it not always feasible to calculate it. This article presents systematic measurements oxygen atoms along made from nickel, cobalt, copper. source O was a surfatron-type microwave plasma. initial density depended gas flow 0.7×10 21 m −3 , 2.4×10 4.2×10 at rates 50, 300, 600 sccm, pressures 10, 35, 60 Pa, respectively. temperature remained room throughout experiments. dissociation fraction decreased exponentially length all cases. depths for well-oxidized nickel were 1.2, 1.7, 2.4 cm, For they slightly lower 1.0, 1.3, 1.6 respectively, while copper, 1.1, 1.7 results explained by dynamics heterogeneous surface association. These data useful any attempt estimate loss fragments tubes, which serve as catalysts association various molecules.

Language: Английский

Citations

0
Advanced Catalytic Syntheses of 1,3-Oxazine Derivatives via Electrophilic Substitution Using Mono- and Bimetallic Phosphate Catalysts: Co₃(PO 4 ) 2 and CoCa 3 (HPO 4 )(PO 4 ) 2 (OH) DOI Creative Commons
Achraf El Hallaoui, Nouhaila Ferraa,

Yousssef MERROUN

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 2, 2024

Abstract This research introduces a novel catalytic approach for the synthesis of 1,3-oxazinone derivatives through multicomponent reaction that relies on an electrophilic substitution mechanism, employing two cobalt-based phosphate catalysts. approach, allowed us to synthesize oxazine derivatives, known their significant biological activities, achieving impressive yields up 97% in remarkably short time only 7 minutes, all under conditions environmentally friendly according principles green chemistry using ethanol/water mixture as solvent. In our study, we utilized catalysts derived from cobalt-modified phosphate, which were synthesized laboratory simple methods. The first support consists monometallic catalyst, denoted Co3(PO4)2, whereas second is bimetallic catalyst modified with cobalt and calcium CoCa3(HPO4)(PO4)2(OH). Our developed methods had various advantages including simplicity process, rapid time, clean-up, ability recover reuse overall simplicity. All these render this effective viable synthesizing suitable large-scale applications.

Language: Английский

Citations

0
Advanced Catalytic Approaches for Synthesizing 1,2-dihydro-1-aryl-3H-naphtho[1,2-e]-[1,3]oxazin-3-one Derivatives through Electrophilic Substitution Reactions using Mono- and Bimetallic Phosphate Catalysts: A Study of Co₃(PO₄)₂ and CoCa₃(HPO₄)(PO₄)₂(OH) DOI Creative Commons
Achraf El Hallaoui, Nouhaila Ferraa,

Yousssef MERROUN

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: Aug. 7, 2024

Abstract This research introduces a novel catalytic approach for the synthesis of 1,3-oxazinone derivatives through multicomponent reaction that relies on an electrophilic substitution mechanism, employing two cobalt-based phosphate catalysts. approach, allowed us to synthesize oxazine derivatives, known their significant biological activities, achieving impressive yields up 97% in remarkably short time only 7 minutes, all under conditions environmentally friendly according principles green chemistry using ethanol/water mixture as solvent. In our study, we utilized catalysts derived from cobalt-modified phosphate, which were synthesized laboratory simple methods. The first support consists monometallic catalyst, denoted Co3(PO4)2, whereas second is bimetallic catalyst modified with cobalt and calcium CoCa3(HPO4)(PO4)2(OH). Our developed methods had various advantages including simplicity process, rapid time, clean-up, ability recover reuse overall simplicity. All these render this effective viable synthesizing suitable large-scale applications.

Language: Английский

Citations

0
Cutting-edge technologies for the recovery of cobalt from different waste discards DOI
Satyabrata Si

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown, P. 365 - 391

Published: Nov. 15, 2024

Language: Английский

Citations

0