The catalytic formation of cyclic organic carbonates (COCs) using carbon dioxide (CO2) as a renewable feed stock is highly vibrant area research with an increasing amount researchers focusing on this thematic investigation. These are useful building blocks and nontoxic reagents most commonly derived from CO2 coupling reactions oxirane dialcohol precursors homogeneous catalysis methodologies. activation suitable reaction partners key technology requisite for efficient conversion its high...

Abstract Metal complexes of salen ligands are an important class compounds, and they have been widely studied in the past. Among their successful catalytic applications, synthesis cyclic carbonates by coupling reaction epoxides with CO 2 has received increased attention; this is mostly due to importance using a greenhouse gas as feedstock for useful molecules. Herein most relevant past present research surrounding topic presented.

The conversion of carbon dioxide (CO₂), an abundant renewable reagent, into chemicals academic and industrial interest is imminent importance to create a higher degree sustainability in chemical processing production.

An aluminum complex based on an amino triphenolate ligand scaffold shows unprecedented high activity (initial TOFs up to 36 000 h–1), broad substrate scope, and functional group tolerance in the formation of highly organic carbonates prepared from epoxides CO2. The developed catalytic protocol is further characterized by low catalyst loadings relative mild reaction conditions using a cheap, abundant, nontoxic metal.

Abstract The reaction mechanism for the Zn(salphen)/NBu 4 X (X=Br, I) mediated cycloaddition of CO 2 to a series epoxides, affording five‐membered cyclic carbonate products has been investigated in detail by using DFT methods. ring‐opening step process was examined and preference opening at methylene (C β ) or methine carbon α established. Furthermore, calculations were performed clarify reasons lethargic behavior internal epoxides presence binary catalyst. Also, insertion ring‐closing steps...

Abstract The use of phenolic compounds as organocatalysts is discussed in the context atom‐efficient cycloaddition carbon dioxide to epoxides, forming useful cyclic organic carbonate products. presence and cooperative nature adjacent groups catalyst structure results significantly enhanced catalytic efficiencies, allowing these CO 2 fixation reactions operate efficiently under virtually ambient conditions. effect has also been studied by computational methods. Furthermore, when are carried...

Abstract Homogeneous catalysis employing carbon dioxide (CO 2 ) as a carbon‐based renewable feedstock has been and continues to be flourishing area of research, providing new improved synthetic methodologies towards range organic products. Since CO is inexpensive, non‐toxic available in virtually unlimited amounts, the progress widespread academic, industrial societal interest. This interest sparked by demanding necessity provide viable alternatives for fossil fuel‐derived precursors their...

Zn(salphen) complexes are reported as effective, cheap, robust and relatively green catalysts for the cycloaddition of carbon dioxide to terminal epoxides afford cyclic carbonates in good yields.

Abstract An iron(III) amine triphenolate complex, [FeTPhOA] 2 , able to efficiently catalyze the cycloaddition of carbon dioxide a range terminal epoxides under mild conditions, is described. In addition, it has also been found that complex conversion with more sterically congested oxiranes and oxetanes which are generally considered challenging substrates activate. Variation co‐catalyst, required for ring‐opening substrates, examined. The results show epoxide converted an iodide whereas...

And mild it is: This Highlight covers the most recent developments in CO2 fixation by homogeneous catalytic methods under reactions conditions. A particular focus is given to two main product categories: formation of carboxylic acids (and derivatives) from sources comprising reactive CH bonds, and integration into (functionalized) epoxides giving rise either cyclic carbonate or poly(carbonate) structures.

The first asymmetric synthesis of α,α-disubstituted allylic N-arylamines based on a palladium-catalyzed amination has been developed. protocol uses highly modular vinyl cyclic carbonates and unactivated aromatic amine nucleophiles as substrates. catalytic process features minimal waste production, ample scope in reaction partners, high induction up to 97% ee, operational simplicity.

The recent advances made in the catalytic preparation of biobased cyclic carbonates derived from sugars, glycerol, fatty acids/vegetable oils and terpenes are presented, together with a discussion surrounding their potential applications.

Squaramides are presented as modular, easy to optimize, and effective catalysts for the conversion of epoxides carbon dioxide into cyclic organic carbonates (COCs). The catalytic potential these squaramides, in combination with a suitable halide nucleophile, is particularly noted when internal examined substrates, their transformation disubstituted COCs marks rare case an organocatalyst challenging conversions. Control experiments support mechanistic view that squaramides predominantly...

The use of renewable terpene-based monomers for the preparation sustainable functional polymers is highlighted.

Salens are among the most widely studied ligands in chemistry. They primarily applied homogeneous catalysis, a use that helps to increase our knowledge of environmentally benign and cost-attractive chemical and/or pharmaceutical processes. Lately, interest salen chemistry has shifted these scaffolds various other applications which immense versatility framework as molecular building block can be exploited. Herein, we highlight recent research involving incorporation motifs new materials...

Transmetalation of polylithiated, carbosilane (CS) dendrimers functionalized with the potentially terdentate ligand [C6H2(CH2NMe2)2-2,6-R-4]- ( = NCN) NiCl2(PEt3)2 produced a series nickel-containing [G0]-Ni4 (4), [G1]-Ni12 (5), and [G2]-Ni36 (7) in moderate to good yields. The metallodendrimers 4, 5, 7 are catalytically active atom-transfer radical addition (ATRA) reaction (Kharasch reaction), viz. 1:1 CCl4 methyl methacrylate (MMA). catalytic data were compared those obtained for...

Zn(II)-salphen complexes are readily accessible and interesting supramolecular building blocks with a large structural diversity. Higher-order assemblies, such as molecular boxes based on bis-Zn(II)-salphen block various ditopic bipyridine ligands, have been constructed by means of supramolecular, coordinative Zn(II)-N(pyr) interactions. The use ligands differing sizes enables the construction structures predefined box diameters. features 2:2 assemblies were investigated in detail (variable...

Abstract The efficient and highly selective formation of a wide range (hetero)cyclic cis ‐diol scaffolds using aminotriphenolate‐based metal catalysts is reported. key intermediates are cyclic carbonates, which obtained in high yield with levels diastereo‐ chemoselectivity from the parent oxirane precursors carbon dioxide. Deprotection carbonate structures affords synthetically useful different ring sizes that incorporate various functional groups. This atom‐efficient method allows simple...

Al(III) complexes of amino-tris(phenolate) ligand scaffolds have been prepared to attain highly Lewis acidic catalysts. Combination the aforementioned systems with ammonium halides provides active catalysts for synthesis organic carbonates through addition carbon dioxide oxiranes initial turnover frequencies among highest reported date within context cyclic carbonate formation. Density functional theory (DFT) studies combined kinetic data a rational relative high activity found these...

Conditions matter: The cycloaddition of carbon dioxide to various epoxides catalyzed by Zn(salphen) complexes selectively yield cyclic carbonates may be performed under ambient conditions. This newly developed process for meets the requirements sustainable and green technology.