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Adding Diversity to Diiron Aminocarbyne Complexes with Amine Ligands. INORGANICS 2023. [DOI: 10.3390/inorganics11030091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/24/2023] Open
Abstract
The reactions of the diiron aminocarbyne complexes [Fe2Cp2(NCMe)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, 1aNCMe; R = Cy, 1bNCMe), freshly prepared from the tricarbonyl precursors 1a–b, with primary amines containing an additional function (i.e., alcohol or ether) proceeded with the replacement of the labile acetonitrile ligand and formation of [Fe2Cp2(NH2CH2CH2OR’)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, R’ = H, 2a; R = Cy, R’ = H, 2b; R = Cy, R’ = Me, 2c) in 81–95% yields. The diiron-oxazolidinone conjugate [Fe2Cp2(NH2OX)(CO)(μ-CO){μ-CN(Me)2}]CF3SO3, 3, was prepared from 1a, 3-(2-aminoethyl)-5-phenyloxazolidin-2-one (NH2OX) and Me3NO, and finally isolated in 96% yield. In contrast, the one pot reactions of 1a-b with NHEt2 in the presence of Me3NO gave the unstable [Fe2Cp2(NHEt2)(CO)(μ-CO){μ-CN(Me)(R)}]CF3SO3 (R = Me, 4a; R = Cy, 4b) as unclean products. All diiron complexes were characterized by analytical and spectroscopic techniques; moreover, the behavior of 2a–c and 3 in aqueous media was ascertained.
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Zhang CH, Wu ZL, Bai RX, Hu TD, Zhao B. Highly Efficient Conversion of Aziridines and CO 2 Catalyzed by Microporous [Cu 12] Nanocages. ACS APPLIED MATERIALS & INTERFACES 2023; 15:1879-1890. [PMID: 36584397 DOI: 10.1021/acsami.2c19614] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
The conversion of CO2 as a C1 source into value-added products is an attractive alternative in view of the green synthesis. Among the reported approaches, the cyclization reaction of aziridines with CO2 is of great significance since the generated N-containing cyclic skeletons are extensively found in pharmaceutical chemistry and industrial production. However, a low turnover number (TON) and homogeneous catalysts are often involved in this catalytic system. Herein, one novel copper-organic framework {[Cu2(L4-)(H2O)2]·3DMF·2H2O}n (1) (H4L = 2'-fluoro-[1,1':4',1″-Terphenyl]-3,3″,5,5″-tetracarboxylic acid) assembled by nanosized [Cu12] cages was successfully synthesized and structurally characterized, which exhibits high CO2/N2 selectivity due to the strong interactions between CO2 and open Cu(II) sites and ligands in the framework. Catalytic investigations suggest that 1 as a heterogeneous catalyst can effectively catalyze the cyclization of aziridines with CO2, and the TON can reach a record value of 90.5. Importantly, 1 displays excellent chemical stability, which can be recycled at least five times. The combination explorations of nuclear magnetic resonance (NMR), 13C-isotope labeling experiments, and density functional theory (DFT) clearly uncover the mechanism of this aziridine/CO2 coupling reaction system, in which 1 and tetrabutylammonium bromide (TBAB) can highly activate the substrate molecule, and the synergistic catalytic effect between them can greatly reduce the reaction energy barrier from 51.7 to 36.2 kcal/mol.
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Affiliation(s)
- Cang-Hua Zhang
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin 300071, P. R. China
| | - Zhi-Lei Wu
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin 300071, P. R. China
| | - Run-Xue Bai
- Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Analytical Science and Technology of Hebei Province, College of Chemistry and Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Tian-Ding Hu
- Institute of Theoretical Chemistry, Jilin University, Changchun 130023, P. R. China
- Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650500, P. R. China
| | - Bin Zhao
- Department of Chemistry, Key Laboratory of Advanced Energy Material Chemistry, MOE, Renewable Energy Conversion and Storage Center (RECAST), Nankai University, Tianjin 300071, P. R. China
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Cavalleri M, Damiano C, Manca G, Gallo E. Protonated Porphyrins: Bifunctional Catalysts for the Metal-Free Synthesis of N-Alkyl-Oxazolidinones. Chemistry 2023; 29:e202202729. [PMID: 36194105 PMCID: PMC10100137 DOI: 10.1002/chem.202202729] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Indexed: 11/12/2022]
Abstract
The protonation of commercially available porphyrin ligands yields a class of bifunctional catalysts able to promote the synthesis of N-alkyl oxazolidinones by CO2 cycloaddition to corresponding aziridines. The catalytic system does not require the presence of any Lewis base or additive, and shows interesting features both in terms of cost effectiveness and eco-compatibility. The metal-free methodology is active even with a low catalytic loading of 1 % mol, and the chemical stability of the protonated porphyrin allowed it to be recycled three times without any decrease in performance. In addition, a DFT study was performed in order to suggest how a simple protonated porphyrin can mediate CO2 cycloaddition to aziridines to yield oxazolidinones.
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Affiliation(s)
- Matteo Cavalleri
- Department of ChemistryUniversity of MilanVia C. Golgi 1920133MilanItaly
| | - Caterina Damiano
- Department of ChemistryUniversity of MilanVia C. Golgi 1920133MilanItaly
| | - Gabriele Manca
- Istituto di Chimica dei Composti OrganoMetalliciICCOM-CNRVia Madonna del Piano 1050019Sesto FiorentinoItaly
| | - Emma Gallo
- Department of ChemistryUniversity of MilanVia C. Golgi 1920133MilanItaly
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Hu Y, Yang L, Liu X. Novel MCM-41 Supported Dicationic Imidazolium Ionic Liquids Catalyzed Greener and Efficient Regioselective Synthesis of 2-Oxazolidinones from Aziridines and Carbon Dioxide. MOLECULES (BASEL, SWITZERLAND) 2022; 28:molecules28010242. [PMID: 36615437 PMCID: PMC9822182 DOI: 10.3390/molecules28010242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/20/2022] [Revised: 12/14/2022] [Accepted: 12/27/2022] [Indexed: 12/29/2022]
Abstract
A type of MCM-41 supported dicationic imidazolium ionic liquid nanocatalyst has been synthesized and found to be competent for the synthesis of 2-oxazolidinones through the sustainable chemical conversion of CO2 with aziridines. It was shown that the highest efficiency was achieved in the cycloaddition of a series of aziridines and CO2 in the presence of a catalytic amount of the solid catalyst MCM-41@ILLaCl4 under mild conditions. Merits of this meticulously designed protocol are the use of a novel supported ionic liquid catalyst, the easy work-up process, good to excellent yields, a short reaction time, and purification without column chromatography. Overall, the present protocol of synthesizing 2-oxazolidinones under cocatalyst- and solvent-free conditions using MCM-41@ILLaCl4 is promising for industrial applications.
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Affiliation(s)
- Yulin Hu
- College of Chemistry and Chemical Engineering, Anshun University, Anshun 561000, China
| | - Lili Yang
- College of Chemistry and Chemical Engineering, Anshun University, Anshun 561000, China
| | - Xiaobing Liu
- College of Chemistry and Chemical Engineering, Jinggangshan University, Ji’an 343009, China
- Correspondence:
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Sonzini P, Berthet N, Damiano C, Dufaud V, Gallo E. A metal-free porphyrin heterogenised onto SBA-15 silica: A performant material for the CO2 cycloaddition to epoxides and aziridines. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Lindberg A, Vasdev N. Ring-opening of non-activated aziridines with [ 11C]CO 2 via novel ionic liquids. RSC Adv 2022; 12:21417-21421. [PMID: 35975081 PMCID: PMC9345297 DOI: 10.1039/d2ra03966d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Accepted: 07/14/2022] [Indexed: 11/23/2022] Open
Abstract
Novel ionic liquids based on DBU and DBN halide salts were developed as a catalytic system for ring-opening of non-activated aziridines with [11C]CO2. The ability of ionic liquids to activate aziridines represents a simple methodology for the synthesis of 11C-carbamates and can be extended for CO2-fixation in organic and radiochemistry. Novel ionic liquids based on DBU and DBN halide salts were developed as a catalytic system for ring-opening of non-activated aziridines with [11C]CO2.![]()
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Affiliation(s)
- Anton Lindberg
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health Toronto ON M5T 1R8 Canada
| | - Neil Vasdev
- Azrieli Centre for Neuro-Radiochemistry, Brain Health Imaging Centre, Centre for Addiction and Mental Health Toronto ON M5T 1R8 Canada .,Department of Psychiatry, University of Toronto Toronto ON M5T 1R8 Canada
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