C–H Activation: Toward Sustainability and Applications

ACS Central Science, Journal Year: 2021, Volume and Issue: 7(2), P. 245 - 261

Published: Feb. 2, 2021

Since the definition of "12 Principles Green Chemistry" more than 20 years ago, chemists have become increasingly mindful need to conserve natural resources and protect environment through judicious choice synthetic routes materials. The direct activation functionalization C–H bonds, bypassing intermediate functional group installation is, in abstracto, step atom economic, but numerous factors still hinder sustainability large-scale applications. In this Outlook, we highlight research areas seeking overcome challenges activation: pursuit abundant metal catalysts, avoidance static directing groups, replacement oxidants, introduction bioderived solvents. We close by examining progress made subfield aryl borylation from its origins, highly efficient precious Ir-based systems, emerging 3d catalysts. future growth field will depend on industrial uptake, thus urge researchers strive toward sustainable activation.

Language: Английский

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Inventive problem-solving map of innovative carbon emission strategies for solar energy-based transportation investment projects

Applied Energy, Journal Year: 2022, Volume and Issue: 311, P. 118680 - 118680

Published: Feb. 14, 2022

The transportation sector is also of great importance in terms carbon emission problem. Significant amount dioxide emitted into the atmosphere due to use fossil fuels transport vehicles. Electric vehicles play a key role overcome this However, high cost an important handicap choosing electric vehicles, especially road transport. Therefore, charged with solar energy can contribute significantly solution In study, it aimed generate inventive problem-solving map innovative reduction strategies for investment projects. Hence, study illustrates causal relationships influencing and influenced items be defined. An extension group decision-making (GDM) spherical fuzzy numbers proposed regarding These principles are weighted by methodology. main contribution present significant increase effectiveness projects novel hybrid analysis results have positive problem industry. findings explain that dynamicity most critical TRIZ-based factor improves because has greatest weight (0.267). Composite materials impact scenario 0.255. It recommended panels should designed so they receive sunlight at different times vertically. Flexible structured considered change position according angle sun during day. Thus, more electrical obtained.

Language: Английский

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3d metallaelectrocatalysis for resource economical syntheses

Chemical Society Reviews, Journal Year: 2020, Volume and Issue: 49(13), P. 4254 - 4272

Published: Jan. 1, 2020

This review summarizes key developments in 3d metallaelectrocatalysis the context of resource economy molecular syntheses.

Language: Английский

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Coordination environment engineering to boost electrocatalytic CO2 reduction performance by introducing boron into single-Fe-atomic catalyst

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 437, P. 135294 - 135294

Published: Feb. 16, 2022

Language: Английский

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Cobalt‐Catalyzed Oxidative C−H Activation: Strategies and Concepts

ChemSusChem, Journal Year: 2020, Volume and Issue: 13(13), P. 3306 - 3356

Published: Feb. 17, 2020

Inexpensive cobalt-catalyzed oxidative C-H functionalization has emerged as a powerful tool for the construction of C-C and C-Het bonds, which offers unique potential transformative applications to modern organic synthesis. In early stage, these transformations typically required stoichiometric toxic transition metals sacrificial oxidants; thus, formation metal-containing waste was inevitable. contrast, naturally abundant molecular O2 more recently been successfully employed green oxidant in cobalt catalysis, thus considerably improving sustainability such transformations. Recently, significant momentum gained by use electricity sustainable environmentally benign redox reagent functionalization, thereby preventing consumption cost-intensive chemicals while at same time addressing considerable safety hazards related oxygen combination with flammable solvents. Considering unparalleled aforementioned approaches synthesis, this Review summarizes recent progress activation until 2020.

Language: Английский

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Renewable resources for sustainable metallaelectro-catalysed C–H activation

Chemical Science, Journal Year: 2020, Volume and Issue: 11(33), P. 8657 - 8670

Published: Jan. 1, 2020

The merger of C–H activation with electrosynthesis, powered by renewable energies and resources, will guide towards a sustainable future.

Language: Английский

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Green strategies for transition metal-catalyzed C–H activation in molecular syntheses

Organic Chemistry Frontiers, Journal Year: 2021, Volume and Issue: 8(17), P. 4886 - 4913

Published: Jan. 1, 2021

Sustainable strategies for the activation of inert C–H bonds towards improved resource-economy.

Language: Английский

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Insights into Cobalta(III/IV/II)‐Electrocatalysis: Oxidation‐Induced Reductive Elimination for Twofold C−H Activation

Angewandte Chemie International Edition, Journal Year: 2020, Volume and Issue: 59(27), P. 10955 - 10960

Published: March 10, 2020

Abstract The merger of cobalt‐catalyzed C−H activation and electrosynthesis provides new avenues for resource‐economical molecular syntheses, unfortunately their reaction mechanisms remain poorly understood. Herein, we report the identification full characterization electrochemically generated high‐valent cobalt(III/IV) complexes as crucial intermediates in electrochemical oxygenations. Detailed mechanistic studies provided support an oxidatively‐induced reductive elimination via highly‐reactive cobalt(IV) intermediates. These key insights set stage unprecedented cobaltaelectro two‐fold C−H/C−H activation.

Language: Английский

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Atropoenantioselective palladaelectro-catalyzed anilide C–H olefinations viable with natural sunlight as sustainable power source

Chemical Science, Journal Year: 2022, Volume and Issue: 13(9), P. 2729 - 2734

Published: Jan. 1, 2022

Asymmetric pallada-electrocatalyzed C–H activation of achiral anilides were accomplished by catalyst control with high levels enantioselectivity. Dual catalysis was devised, while photovoltaic cells could be used to empower the electrocatalysis.

Language: Английский

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Cobalta-Electrocatalyzed C–H Allylation with Unactivated Alkenes

ACS Catalysis, Journal Year: 2020, Volume and Issue: 10(11), P. 6457 - 6462

Published: May 12, 2020

Versatile and robust cobalt catalysis enabled the electrochemical C–H allylation with nonactivated alkenes. In contrast to precious palladium, rhodium, iridium, ruthenium catalysts that are limited electronically activated styrenes acrylates, we herein disclose cobalt-catalyzed electro-oxidative allylations Thus, allylated benzamides were obtained high levels of chemoselectivity, positional selectivity, regioselectivity in biomass-derived solvent γ-valerolactone. Detailed mechanistic studies provided strong support for a base-assisted internal electrophilic-type substitution mechanism key activation step. The cobaltaelectro-catalysis overall achieved resource-economy by avoiding use stoichiometric chemical oxidants, H2 as only byproduct.

Language: Английский

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