Ionic liquids (ILs) are incorporated into traditional porous materials to create ILs-functionalized porous materials, which exhibit excellent absorption capacity and good catalytic activity for CO2. As a result, they are extensively utilized in the chemical conversion of CO2. This paper specifically focuses on the utilization of ILs-functionalized organic porous materials, ILs-functionalized inorganic porous materials, and ILs-functionalized organic-inorganic hybrid porous materials in the conversion of CO2. The synergistic effects of combining ILs with porous materials in CO2 conversion are thoroughly discussed. Furthermore, an in-depth analysis is provided regarding the potential prospects and future applications of utilizing ILs-functionalized porous materials within the broader realm of catalytic CO2 conversion technologies.
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Ionic Liquid‐Functionalized Porous Materials for Catalyzing CO2 Cycloaddition Reaction
Synthesis and electronic properties of nitrogen-rich nanographene
DOI: 10.1039/D4CC01189A, Communication
A polycyclic aromatic hydrocarbon displaying twelve edge nitrogen centers for a 42 π-electron system is reported.
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[ASAP] Optical Terpene and Terpenoid Sensing: Chiral Recognition, Determination of Enantiomeric Composition and Total Concentration Analysis with Late Transition Metal Complexes
Iridium‐Catalyzed Cycloisomerization of Alkynoic Acids: Synthesis of Unsaturated Lactones
Abstract
The iridium‐catalyzed cycloisomerization of various alkynoic acids was successfully developed, and a series of five‐, six‐, and especially seven‐membered unsaturated lactones were constructed with moderate yields and excellent regioselectivities (up to 68% yield, >99:1 rr). In addition, the indole compound can be easily prepared with 75% yield through this efficient synthetic methodology. Moreover, a plausible mechanism for this Ir‐catalyzed cycloisomerization of alkynoic acids was proposed.
N-heterocyclic Carbene–Cu-Catalyzed Enantioselective Conjugate Additions with Alkenylboronic Esters as Nucleophiles
Isonicotinate Ester Catalyzed Decarboxylative Borylation of (Hetero)Aryl and Alkenyl Carboxylic Acids through N-Hydroxyphthalimide Esters
Calcium(II)-Catalyzed Alkenylation of N-Acyliminiums and Related Ions with Vinylboronic Acids
Abstract
Efficient C−C bond-forming reactions between N,O-acetals and vinylboronic acids were achieved via a calcium(II)-catalyzed formation of a N-acyliminium intermediate or a related ion. This strategy can give a rapid access to a wide variety of alkenyl-functionalized nitrogen-containing compounds in good to excellent yields under simple reaction conditions.
Chemoselective Reduction of Azlactones Using Schwartz’s Reagent
Arylative Intramolecular Allylation of Ketones with 1,3-Enynes Enabled by Catalytic Alkenyl-to-Allyl 1,4-Rhodium(I) Migration
Abstract
Alkenyl-to-allyl 1,4-rhodium(I) migration enables the generation of nucleophilic allylrhodium(I) species by remote C−H activation. This new mode of reactivity was employed in the diastereoselective reaction of arylboron reagents with substrates containing a 1,3-enyne tethered to a ketone, to give products containing three contiguous stereocenters. The products can be obtained in high enantioselectivities using a chiral sulfur-alkene ligand.
On the move: The title migration enables the generation of nucleophilic allylrhodium(I) species by remote C−H activation. This new mode of reactivity was employed in the diastereoselective reaction of arylboron reagents with substrates containing a 1,3-enyne tethered to a ketone, to give products containing three contiguous stereocenters. The products can be obtained in high enantioselectivities using a chiral sulfur-alkene ligand.
Rh-Catalyzed Anti-Markovnikov Hydrocyanation of Terminal Alkynes
B(C6F5)3-Catalyzed (Convergent) Disproportionation Reaction of Indoles
B(C6F5)3-Catalyzed Selective Chlorination of Hydrosilanes
Abstract
The chlorination of Si−H bonds often requires stoichiometric amounts of metal salts in conjunction with hazardous reagents, such as tin chlorides, Cl2, and CCl4. The catalytic chlorination of silanes often involves the use of expensive transition-metal catalysts. By a new simple, selective, and highly efficient catalytic metal-free method for the chlorination of Si−H bonds, mono-, di-, and trihydrosilanes were selectively chlorinated in the presence of a catalytic amount of B(C6F5)3 or Et2O⋅B(C6F5)3 and HCl with the release of H2 as a by-product. The hydrides in di- and trihydrosilanes could be selectively chlorinated by HCl in a stepwise manner when Et2O⋅B(C6F5)3 was used as the catalyst. A mechanism is proposed for these catalytic chlorination reactions on the basis of competition experiments and density functional theory (DFT) calculations.
Cl-early a winning combination: Hydrosilanes underwent selective chlorination upon treatment with HCl in the presence of a catalytic amount of B(C6F5)3 with the liberation of H2 (see scheme). For the chlorination of di- and trihydrosilanes, the adduct Et2O⋅B(C6F5)3 was found to be the more selective catalyst.
Ring-opening of cyclic ethers by aluminum hydridotriphenylborate
DOI: 10.1039/C7CC01159H, Communication
Ring-opening of THF or THP in the presence of pinacolborane can be catalyzed by a molecular aluminum hydride catalyst [(L)AlH2]2 (L = Me3TACD)/BPh3 and involves an isolable intermediate [(L)AlH][HBPh3].
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