Themed collection Green Synthesis

22 items
Open Access Feature Article

Xylochemicals and where to find them

More than 100 useful ‘xylochemicals’ and their natural origins are offered combined with an overview of comparative petro- and xylochemical approaches to synthetic chemistry.

Graphical abstract: Xylochemicals and where to find them
From the themed collection: Green Synthesis
Feature Article

Organocatalytic enantioselective reactions involving prochiral carbocationic intermediates

This feature article aims to summarize the exciting advances in organocatalytic enantioselective reactions involving prochiral carbocationic intermediates.

Graphical abstract: Organocatalytic enantioselective reactions involving prochiral carbocationic intermediates
From the themed collection: Green Synthesis
Accepted Manuscript - Feature Article

Recent advances in (chemo)enzymatic cascades for upgrading bio-based resources

From the themed collection: Green Synthesis
Feature Article

Recent advances in transition metal-catalyzed (1,n) annulation using (de)-hydrogenative coupling with alcohols

Recent progress in sustainable approaches using (1,n) annulation for the synthesis of stereo-selective cycloalkanes, cycloalkenes and N-heterocycles is discussed.

Graphical abstract: Recent advances in transition metal-catalyzed (1,n) annulation using (de)-hydrogenative coupling with alcohols
From the themed collection: Green Synthesis
Feature Article

Photocatalytic cross-couplings via the cleavage of N–O bonds

This feature article summarises the recent progress in the visible light photoredox organic reactions of N-(acyloxy)phthalimide and oxime derivatives via the cleavage of N–O bonds.

Graphical abstract: Photocatalytic cross-couplings via the cleavage of N–O bonds
From the themed collection: Green Synthesis
Open Access Feature Article

Advances in photochemical and electrochemical incorporation of sulfur dioxide for the synthesis of value-added compounds

Photosynthesis and electrosynthesis enable the “green” upcycling of SO2 to value-added products.

Graphical abstract: Advances in photochemical and electrochemical incorporation of sulfur dioxide for the synthesis of value-added compounds
From the themed collection: Green Synthesis
Feature Article

Visible-light-facilitated P-center radical addition to C[double bond, length as m-dash]X (X = C, N) bonds results in cyclizations

Different strategies and new P-radical precursor induced C–P bond formation by visible light photocatalysis were summarized.

Graphical abstract: Visible-light-facilitated P-center radical addition to C [[double bond, length as m-dash]] X (X = C, N) bonds results in cyclizations
From the themed collection: Green Synthesis
Open Access Feature Article

Enhanced polysaccharide nanofibers via oxidation over SiliaCat TEMPO

Drawing on independent work carried out by academic and industrial researchers using the immobilized TEMPO catalyst SiliaCat TEMPO, in this study, we show how shifting the carboxylation process mediated by TEMPO in solution to a process mediated by the above-mentioned hybrid sol–gel catalyst allows the synthesis of insoluble polysaccharide nanofibers of superior quality, eliminating waste.

Graphical abstract: Enhanced polysaccharide nanofibers via oxidation over SiliaCat TEMPO
From the themed collection: Chemical Communications HOT articles
Open Access Communication

Molecular recognition and adsorptive separation of m-xylene by trianglimine crystals

An energy-efficient adsorptive molecular sieving strategy is reported using a crystalline trianglimine macrocycle to separate the elusive m-xylene isomer with over 91% purity.

Graphical abstract: Molecular recognition and adsorptive separation of m-xylene by trianglimine crystals
From the themed collection: Green Synthesis
Communication

Weak base-promoted selective rearrangement of oxaziridines to amides via visible-light photoredox catalysis

The photocatalytic single-electron oxidation of oxaziridines increases their acidity, thus facilitating the application of a weak base feasible for converting oxaziridines to amides.

Graphical abstract: Weak base-promoted selective rearrangement of oxaziridines to amides via visible-light photoredox catalysis
From the themed collection: Green Synthesis
Communication

Tropylium-promoted Ritter reactions

The tropylium ion serves as an excellent and environmentally-benign catalyst for the Ritter reaction.

Graphical abstract: Tropylium-promoted Ritter reactions
From the themed collection: Green Synthesis
Open Access Communication

Aerobic oxidation and oxidative esterification of alcohols through cooperative catalysis under metal-free conditions

The ABNO@PMO-IL-Br material obtained by anchoring 9-azabicyclo[3.3.1]nonane-3-one N-oxyl within the mesopores of PMO with bridged imidazolium groups is a robust bifunctional catalyst for the metal-free aerobic oxidation of a wide variety of alcohols under oxygen balloon reaction conditions.

Graphical abstract: Aerobic oxidation and oxidative esterification of alcohols through cooperative catalysis under metal-free conditions
From the themed collection: Green Synthesis
Communication

Hydrogen bonding-catalysed alcoholysis of propylene oxide at room temperature

Alcoholysis of propylene oxide is achieved over azolate ionic liquids at room temperature by hydrogen-bonding catalysis, accessing glycol ethers in moderate to high yields with selectivity of >99%.

Graphical abstract: Hydrogen bonding-catalysed alcoholysis of propylene oxide at room temperature
From the themed collection: Green Synthesis
Communication

Electrochemical reduction of fluoroalkyl sulfones for radical fluoroalkylation of alkenes

Radical fluoroalkylation of alkenes has been developed by electrochemical reduction of fluoroalkyl sulfones.

Graphical abstract: Electrochemical reduction of fluoroalkyl sulfones for radical fluoroalkylation of alkenes
From the themed collection: Green Synthesis
Open Access Communication

Artificial plant cell walls as multi-catalyst systems for enzymatic cooperative asymmetric catalysis in non-aqueous media

Immobilization of lipase and palladium nanoparticles onto cellulose creates an artificial plant cell wall structure for dynamic kinetic resolution.

Graphical abstract: Artificial plant cell walls as multi-catalyst systems for enzymatic cooperative asymmetric catalysis in non-aqueous media
From the themed collection: Green Synthesis
Communication

Electrochemical trifluoromethylation/cyclization for the synthesis of isoquinoline-1,3-diones and oxindoles

Herein, we describe a protocol for electrochemical cathode reduction to generate trifluoromethyl radicals.

Graphical abstract: Electrochemical trifluoromethylation/cyclization for the synthesis of isoquinoline-1,3-diones and oxindoles
From the themed collection: Green Synthesis
Communication

B(C6F5)3-Catalyzed site-selective N1-alkylation of benzotriazoles with diazoalkanes

The site-selective N1-alkylation of benzotriazoles with diazoalkanes is achieved using 10 mol% of B(C6F5)3 as a catalyst.

Graphical abstract: B(C6F5)3-Catalyzed site-selective N1-alkylation of benzotriazoles with diazoalkanes
From the themed collection: Green Synthesis
Communication

Micelle enabled C(sp2)–C(sp3) cross-electrophile coupling in water via synergistic nickel and copper catalysis

A robust and sustainable C(sp2)–C(sp3) cross-electrophile coupling was developed via nickel/copper synergistic catalysis under micellar conditions.

Graphical abstract: Micelle enabled C(sp2)–C(sp3) cross-electrophile coupling in water via synergistic nickel and copper catalysis
From the themed collection: Green Synthesis
Open Access Communication

An alginate-confined peroxygenase-CLEA for styrene epoxidation

An alginate-confined peroxygenase-CLEA has been prepared for the stereoselective epoxidation of cis-β-methylstyrene under non-aqueous reaction conditions. Product titres of up to 48 mM and excellent enzyme turnovers of 96 000 have been achieved.

Graphical abstract: An alginate-confined peroxygenase-CLEA for styrene epoxidation
From the themed collection: Green Synthesis
Communication

Low molecular weight and highly functional RCF lignin products as a full bisphenol a replacer in bio-based epoxy resins

A lignocellulose-to-chemicals valorization chain is presented, wherein lignin oligomers obtained from reductive catalytic fractionation are used to synthesize BPA-free epoxy resins.

Graphical abstract: Low molecular weight and highly functional RCF lignin products as a full bisphenol a replacer in bio-based epoxy resins
From the themed collection: Green Synthesis
Communication

Visible-light-mediated multicomponent reaction for secondary amine synthesis

The widespread presence of secondary amines in agrochemicals, pharmaceuticals, natural products, and small-molecule biological probes has inspired efforts to streamline the synthesis of molecules with this functional group.

Graphical abstract: Visible-light-mediated multicomponent reaction for secondary amine synthesis
From the themed collection: Green Synthesis
Communication

Electrochemical synthesis of sulfamides

Organic electrosynthesis enables the formation of symmetrical sulfamides directly from anilines and SO2 mediated by iodide.

Graphical abstract: Electrochemical synthesis of sulfamides
From the themed collection: Green Synthesis
22 items

About this collection

Chemical Synthesis is the foundation of modern medicines for human health, agrochemicals to boost world food supply, and various synthetic fibers for daily usages, among many others.  Despite these undisputed benefits, many state-of-art chemical syntheses are unsustainable from the viewpoint of the feedstocks to the reactions and process technologies used and the amount of waste generated. The emergence of Green Chemistry led chemists to rethink methods for the generation and utilisation of chemical products in every aspect.  Green synthesis, as an integral part of Green Chemistry, encompasses the entire lifecycle of chemical synthesis. These include the use of renewable rather than fossil based raw materials, the replacement of stoichiometric reactions by chemo- and biocatalytic alternatives, including photocatalysis and electrocatalysis, the streamlining of synthesis by minimising auxiliary steps such as activation,  and protection-deprotection, and the use of continuous processing. This special issue, Guest Edited by Chao-Jun Li (McGill University), Shu Koboyashi (University of Tokyo) and Roger Sheldon (University of the Witwatersrand) will highlight recent advances in these various approaches to the greening of organic synthesis.

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