1
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Zheng Y, Yang Y, Li Y, Cai L, Zhao X, Xue B, Li Y, An J, Zhang J. Preparation of Hydrophobic Au Catalyst and Application in One-Step Oxidative Esterification of Methacrolein to Methyl Methacrylate. Molecules 2024; 29:1854. [PMID: 38675674 PMCID: PMC11055172 DOI: 10.3390/molecules29081854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2024] [Revised: 04/07/2024] [Accepted: 04/11/2024] [Indexed: 04/28/2024] Open
Abstract
The water produced during the oxidative esterification reaction occupies the active sites and reduces the activity of the catalyst. In order to reduce the influence of water on the reaction system, a hydrophobic catalyst was prepared for the one-step oxidative esterification of methylacrolein (MAL) and methanol. The catalyst was synthesized by loading the active component Au onto ZnO using the deposition-precipitation method, followed by constructing the silicon shell on Au/ZnO using tetraethoxysilane (TEOS) to introduce hydrophobic groups. Trimethylchlorosilane (TMCS) was used as a hydrophobic modification reagent to prepare hydrophobic catalysts, which exhibited a water droplet contact angle of 111.2°. At a temperature of 80 °C, the hydrophobic catalyst achieved a high MMA selectivity of over 95%. The samples were characterized using XRD, N2 adsorption, ICP, SEM, TEM, UV-vis, FT-IR, XPS, and water droplet contact angle measurements. Kinetic analysis revealed an activation energy of 22.44 kJ/mol for the hydrophobic catalyst.
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Affiliation(s)
- Yanxia Zheng
- Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China; (Y.Z.)
| | - Yubo Yang
- Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China; (Y.Z.)
| | - Yixuan Li
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
| | - Lu Cai
- Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China; (Y.Z.)
| | - Xuanjiao Zhao
- Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China; (Y.Z.)
| | - Bing Xue
- School of Mechanical Engineering, Shandong University of Technology, Zibo 255049, China
| | - Yuchao Li
- Institute of Clean Chemical Technology, School of Chemistry and Chemical Engineering, Shandong Collegial Engineering Research Center of Novel Rare Earth Catalysis Materials, Shandong University of Technology, Zibo 255049, China; (Y.Z.)
| | - Jiutao An
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo 255049, China
| | - Jialiang Zhang
- Shandong Mingsheng Environmental Protection Technology Co., Ltd., Jinan 250000, China
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2
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Yu Y, Lin J, Qin A, Wang H, Wang J, Wang W, Wu G, Zhang Q, Qian H, Ma S. Relay Catalysis for Selective Aerobic Oxidative Esterification of Primary Alcohols with Methanol. Org Lett 2024. [PMID: 38619221 DOI: 10.1021/acs.orglett.4c01059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/16/2024]
Abstract
Esters are bulk and fine chemicals and ubiquitous in polymers, bioactive compounds, and natural products. Their traditional synthetic approach is the esterification of carboxylic acids or their activated derivatives with alcohols. Herein, a bimetallic relay catalytic protocol was developed for the aerobic esterification of one alcohol in the presence of a slowly oxidizing alcohol, which has been identified as methanol. A concise synthesis of phlomic acid was executed to demonstrate the practicality and potential of this reaction.
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Affiliation(s)
- Yibo Yu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Jie Lin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Anni Qin
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Huanan Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Jie Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Weiyi Wang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Guolin Wu
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Qian Zhang
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Hui Qian
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
| | - Shengming Ma
- Research Center for Molecular Recognition and Synthesis, Department of Chemistry, Fudan University, 220 Handan Lu, Shanghai 200433, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, P. R. China
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3
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Abbasi F, Sardarian AR. Direct additive-free N-formylation and N-acylation of anilines and synthesis of urea derivatives using green, efficient, and reusable deep eutectic solvent ([ChCl][ZnCl 2] 2). Sci Rep 2024; 14:7206. [PMID: 38532063 DOI: 10.1038/s41598-024-57608-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2024] [Accepted: 03/20/2024] [Indexed: 03/28/2024] Open
Abstract
In the current report, we introduce a simple, mild efficient and green protocol for N-formylation and N-acetylation of anilines using formamide, formic acid, and acetic acid as inexpensive, nontoxic, and easily available starting materials just with heating along stirring in [ChCl][ZnCl2]2 as a durable, reusable deep eutectic solvent (DES), which acts as a dual catalyst and solvent system to produce a wide range of formanilides and acetanilides. Also, a variety of unsymmetrical urea derivatives were synthesized by the reaction of phenyl isocyanate with a range of amine compounds using this benign DES in high to excellent yields. [ChCl][ZnCl2]2 showed good recycling and reusability up to four runs without considerable loss of its catalytic activity.
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Affiliation(s)
- Fatemeh Abbasi
- Chemistry Department, College of Sciences, Shiraz University, Shiraz, 71946-84795, Iran
| | - Ali Reza Sardarian
- Chemistry Department, College of Sciences, Shiraz University, Shiraz, 71946-84795, Iran.
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4
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Dellisanti A, Chessa E, Porcheddu A, Carraro M, Pisano L, De Luca L, Gaspa S. Visible Light-Promoted Oxidative Cross-Coupling of Alcohols to Esters. Molecules 2024; 29:570. [PMID: 38338315 PMCID: PMC10856673 DOI: 10.3390/molecules29030570] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/16/2024] [Accepted: 01/19/2024] [Indexed: 02/12/2024] Open
Abstract
Ester is one of the most significant functional groups in organic chemistry and is enclosed in several valued molecules. Usually, esters are prepared through the acid-catalyzed esterification reaction of carboxylic acids with alcohols, transesterification of esters with alcohols, or via activation of carboxylic acids followed by the addition of alcohols. However, these procedures typically imply the excess use of reactants and harsh reaction conditions. Visible light-mediated photoreactions have been disclosed to display a safe, sustainable, and accessible alternative to traditional methods, and to lead new reactivity modes in organic procedures. In this context, we propose a transition metal-based and organic-based photocatalyst-free synthesis of esters from alcohols induced by visible light. The methodology can be carried out using sunlight or artificial visible light as a solar simulator or a blue LED source.
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Affiliation(s)
- Andrea Dellisanti
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Elisa Chessa
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Andrea Porcheddu
- Dipartimento di Scienze Chimiche e Geologiche, Università degli Sudi di Cagliari, 09042 Monserrato, Italy;
| | - Massimo Carraro
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Luisa Pisano
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Lidia De Luca
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
| | - Silvia Gaspa
- Dipartimento di Scienze Chimiche, Fisiche, Matematiche e Naturali, Università degli Sudi di Sassari, Via Vienna 2, 07100 Sassari, Italy; (A.D.); (E.C.); (M.C.); (L.P.); (S.G.)
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5
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Bhardwaj N, Tripathi N, Kumar S, Jain SK. Synthesis of amides directly from carboxylic acids and hydrazines. Org Biomol Chem 2023; 21:7572-7579. [PMID: 37671775 DOI: 10.1039/d3ob01268a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/07/2023]
Abstract
The method for amide bond synthesis described here utilizes carboxylic acids and hydrazines in the presence of a catalytic amount of ZnCl2. This is the first report that highlights the use of hydrazine as an amine partner for amide synthesis directly with carboxylic acids. Ammonia (gas) is the only by-product in this method. The methodology is simple and could help in the synthesis of peptides and natural product derivatives.
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Affiliation(s)
- Nivedita Bhardwaj
- Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India.
| | - Nancy Tripathi
- Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India.
| | - Sanjay Kumar
- Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India.
| | - Shreyans K Jain
- Department of Pharmaceutical Engineering & Technology, Indian Institute of Technology (Banaras Hindu University), Varanasi-221005, India.
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6
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Yan XX, Lu WX, Mao JG, Xing J, Tang HY, Huang SY, Jiang W. Palladium-Catalyzed Direct Esterification via C-H Bond Activation of Aldehydes. J Org Chem 2023. [PMID: 37307498 DOI: 10.1021/acs.joc.3c00729] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
A concise and highly efficient synthesis method of direct esterification of aldehydes via Pd-catalyzed C-H bond activation of aldehyde group has been developed. The strategy avoids the preoxidation step of aldehyde or use of condensing agents in ester synthesis, which is not only applicable to various alcohols but also suitable for the esterification of phenolics which are usually difficult to be esterified. The methodology has the significant advantages of broad substrate scope, mild reaction conditions, and nonrequirement of additional oxidants.
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Affiliation(s)
- Xiao-Xiao Yan
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Wen-Xiu Lu
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Jian-Gang Mao
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Jian Xing
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Hong-Yu Tang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Shu-Yi Huang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
| | - Wen Jiang
- School of Chemistry and Chemical Engineering, Jiangxi Provincial Key Laboratory of Functional Molecular Materials Chemistry, Jiangxi University of Science and Technology, 156 Kejia Avenue, Ganzhou 341000, P. R. China
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7
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Wadey GP, Doherty KE, Sandoval AL, Leadbeater NE. Preparation of novel acyl pyrazoles and triazoles by means of oxidative functionalization reactions. HETEROCYCL COMMUN 2023. [DOI: 10.1515/hc-2022-0158] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
Abstract
Novel acyl pyrazoles and acyl triazoles have been prepared by means of the oxidative amidation of aldehydes in the presence of the requisite azole. Yields range from modest to good in both cases, and some limitations of the substrate scope have been discovered. Acyl pyrazoles were prepared by treatment of a mixture of aldehyde and pyrazole with an oxoammonium salt bearing the nitrate anion. In the case of acyl triazoles, the oxidative functionalization was performed using sodium persulfate as a terminal oxidant in the presence of a catalytic quantity of a nitroxide.
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Affiliation(s)
- Geoffrey P. Wadey
- Department of Chemistry, University of Connecticut , 55 North Eagleville Road , Storrs , CT 06269 , USA
| | - Katrina E. Doherty
- Department of Chemistry, University of Connecticut , 55 North Eagleville Road , Storrs , CT 06269 , USA
| | - Arturo León Sandoval
- Department of Chemistry, University of Connecticut , 55 North Eagleville Road , Storrs , CT 06269 , USA
| | - Nicholas E. Leadbeater
- Department of Chemistry, University of Connecticut , 55 North Eagleville Road , Storrs , CT 06269 , USA
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8
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Nagy BS, Fu G, Hone CA, Kappe CO, Ötvös SB. Harnessing a Continuous-Flow Persulfuric Acid Generator for Direct Oxidative Aldehyde Esterifications. CHEMSUSCHEM 2023; 16:e202201868. [PMID: 36377674 PMCID: PMC10107610 DOI: 10.1002/cssc.202201868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 10/30/2022] [Indexed: 06/16/2023]
Abstract
Persulfuric acid is a well-known oxidant in various industrial-scale purification procedures. However, due to its tendency toward explosive decomposition, its usefulness in organic synthesis remained largely underexplored. Herein, a continuous in situ persulfuric acid generator was developed and applied for oxidative esterification of aldehydes under flow conditions. Sulfuric acid served as a readily available and benign precursor to form persulfuric acid in situ. By taking advantage of the continuous-flow generator concept, safety hazards were significantly reduced, whilst a robust and effective approach was ensured for direct transformations of aldehydes to valuable esters. The process proved useful for the transformation of diverse aliphatic as well as aromatic aldehydes, while its preparative capability was verified by the multigram-scale synthesis of a pharmaceutically relevant key intermediate. The present flow protocol demonstrates the safe, sustainable, and scalable application of persulfuric acid in a manner that would not be amenable to conventional batch processing.
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Affiliation(s)
- Bence S. Nagy
- Institute of ChemistryUniversity of GrazNAWI GrazHeinrichstrasse 28A-8010GrazAustria
| | - Gang Fu
- Institute of ChemistryUniversity of GrazNAWI GrazHeinrichstrasse 28A-8010GrazAustria
| | - Christopher A. Hone
- Institute of ChemistryUniversity of GrazNAWI GrazHeinrichstrasse 28A-8010GrazAustria
- Center for Continuous Flow Synthesis and Processing (CC FLOW)Research CenterPharmaceutical Engineering GmbH (RCPE)Inffeldgasse 13A-8010GrazAustria
| | - C. Oliver Kappe
- Institute of ChemistryUniversity of GrazNAWI GrazHeinrichstrasse 28A-8010GrazAustria
- Center for Continuous Flow Synthesis and Processing (CC FLOW)Research CenterPharmaceutical Engineering GmbH (RCPE)Inffeldgasse 13A-8010GrazAustria
| | - Sándor B. Ötvös
- Institute of ChemistryUniversity of GrazNAWI GrazHeinrichstrasse 28A-8010GrazAustria
- Center for Continuous Flow Synthesis and Processing (CC FLOW)Research CenterPharmaceutical Engineering GmbH (RCPE)Inffeldgasse 13A-8010GrazAustria
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9
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Kumar S, Agasti N, Singh G, Kumar A. Base‐Mediated
N
‐Acetylation of Anilines/Amines: Nitriles as a Surrogate of the Acetyl Group. ChemistrySelect 2023. [DOI: 10.1002/slct.202204679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Saurav Kumar
- Department of Applied Chemistry Delhi Technological University 110042 Delhi India
| | - Nityananda Agasti
- Department of Chemistry Deen Dayal Upadhyaya College University of Delhi 110078 Delhi India
| | - Gajendra Singh
- Department of Chemistry Deshbandhu College University of Delhi 110019 Delhi India
| | - Anil Kumar
- Department of Applied Chemistry Delhi Technological University 110042 Delhi India
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10
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Christidou A, Zavalani K, Hatzidimitriou AG, Psomas G. Copper(II) complexes with 3,5-dihalogeno-salicylaldehydes: Synthesis, structure and interaction with DNA and albumins. J Inorg Biochem 2023; 238:112049. [PMID: 36327500 DOI: 10.1016/j.jinorgbio.2022.112049] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 10/12/2022] [Accepted: 10/21/2022] [Indexed: 11/21/2022]
Abstract
Eight copper(II) complexes of 3,5-dichloro-salicyladehyde or 3,5-dibromo-salicyladehyde (3,5-diX-saloH, X = Br or Cl) were synthesized in the absence or presence of a N,N'-donor co-ligand such as 2,2'-bipyridylamine, 1,10-phenanthroline, or 2,2'-bipyridine. The resultant compounds were formulated as [Cu(3,5-diX-salo)2(MeOH)2] (1-2) and [Cu(3,5-diX-salo)(N,N'-donor)Cl] (3-8) and were characterized by diverse techniques. The crystal structures of three complexes were determined by single-crystal X-ray crystallography. Diverse techniques were employed in order to investigate the interaction of the complexes with calf-thymus DNA which showed intercalation as the most possible mode of their interaction. The affinity of the complexes for bovine serum albumin and human serum albumin was evaluated by fluorescence emission spectroscopy in order to calculate the binding constants which suggested a tight and reversible binding. SYNOPSIS: A series of copper(II) complexes with 3,5-dihalogen-substituted salicylaldehydes as ligands were isolated and characterized. In vitro biological studies showed the intercalation of the compounds with calf-thymus DNA and their tight and reversible binding with serum albumins.
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Affiliation(s)
- Aphrodite Christidou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - Konstantina Zavalani
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - Antonios G Hatzidimitriou
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece
| | - George Psomas
- Laboratory of Inorganic Chemistry, Department of Chemistry, Aristotle University of Thessaloniki, GR 54124 Thessaloniki, Greece.
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11
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(3,5-Di-tert-butylphenyl)(1H-pyrazol-1-yl)methanone. MOLBANK 2022. [DOI: 10.3390/m1468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The acyl pyrazole derivative (3,5-di-tert-butylphenyl)(1H-pyrazol-1-yl)methanone was prepared simply and rapidly in 86% isolated yield by means of an oxidative functionalization reaction of an aldehyde with pyrazole. A substoichiometric quantity of 4-acetamido-2,2,6,6-tetramethylpiperidine-1-oxoammonium nitrate was used as the oxidant. The reaction was performed solvent-free and in the absence of a base, making it a clean, green approach. The mixture of aldehyde, pyrazole, and the oxidant was heated at 55 °C for 3 h, and then, the product was isolated in analytically pure form via extraction with no need for column chromatography.
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12
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Pan B, Sun HT, Zhang SS, Wang S, Yang YQ, Xu GZ, Su XB. Solvent-Controlled Regioselective Reaction of 2-Methyleneaziridines with Acrylic/Propargylic Acids: Synthesis of Carboxylate Aziridine/Acetone Esters. Org Lett 2022; 24:7492-7496. [PMID: 36215416 DOI: 10.1021/acs.orglett.2c02589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report a convenient solvent-controlled regioselective esterification to access two types of carboxylate esters without any additive or non-green activation strategy. In this transformation, 2-methyleneaziridines served as an ester reagent, providing two alternative electrophilic carbon centers. Notably, this protocol is suitable for some structure-complicated clinical molecules with a carboxylic acid group, presenting remarkable application potential.
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Affiliation(s)
- Bin Pan
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Hao-Tian Sun
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Shan-Shan Zhang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Shang Wang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Yong-Qi Yang
- Shandong Peninsula Engineering Research Center of Comprehensive Brine Utilization, Weifang University of Science and Technology, Shouguang 262700, P. R. China
| | - Guang-Zhao Xu
- School of Pharmacy, Weifang Medical University, Weifang 261053, P. R. China
| | - Xian-Bin Su
- College of Chemical Engineering, Nanjing Tech University, Nanjing 210009, P. R. China
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13
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Ai H, Leidecker BN, Dam P, Kubis C, Rabeah J, Wu X. Iron‐Catalyzed Alkoxycarbonylation of Alkyl Bromides via a Two‐Electron Transfer Process. Angew Chem Int Ed Engl 2022; 61:e202211939. [DOI: 10.1002/anie.202211939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Indexed: 11/12/2022]
Affiliation(s)
- Han‐Jun Ai
- Leibniz-Institut fur Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | | | - Phong Dam
- Leibniz-Institut fur Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Christoph Kubis
- Leibniz-Institut fur Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Jabor Rabeah
- Leibniz-Institut fur Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Xiao‐Feng Wu
- Leibniz-Institut fur Katalyse e.V. Albert-Einstein-Straße 29a 18059 Rostock Germany
- Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Institution 116023 Dalian Liaoning China
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14
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Chai LL, Zhao YH, Young DJ, Lu X, Li HX. Ni(II)-Mediated Photochemical Oxidative Esterification of Aldehydes with Phenols. Org Lett 2022; 24:6908-6913. [PMID: 36121710 DOI: 10.1021/acs.orglett.2c02560] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The photopromoted, Ni-catalyzed acceptorless dehydrogenation esterification of phenols and aromatic aldehydes has been achieved in an oxidant- and external photosensitizer-free manner. This reliable and atom-economical transformation was tolerant to a wide range of functional groups and proceeded efficiently to give various aryl benzoates in moderate to high yields. Additionally, this photocatalytic system displayed high activity for the hydrogen-evolution cross coupling of aliphatic aldehydes and phenols employing dual nickel and aromatic aldehyde catalysis.
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Affiliation(s)
- Lu-Lu Chai
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - You-Hui Zhao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - David James Young
- College of Engineering, IT and Environment, Charles Darwin University, Darwin, NT 0909, Australia
| | - Xinhua Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Hong-Xi Li
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
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15
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Iron‐catalyzed alkoxycarbonylation of alkyl bromides via a two‐electron transfer process. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202211939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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16
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Ismaeel N, Zhuo Z, Imran S, Yuan D, Yao Y. Synthesis and characterization of rare earth/lithium complexes stabilized by ethylenediamine-bridged bis(phenolate) ligands and their activity in catalyzing amidation reactions. Dalton Trans 2022; 51:13892-13901. [PMID: 36040382 DOI: 10.1039/d2dt02642b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rare earth/lithium complexes stabilized by ethylenediamine-bridged bis(phenolate) ligands have been synthesized and characterized. In addition to five rare earth/lithium amides isolated as major complexes, two other rare earth/lithium complexes bearing two phenolate ligands were also isolated. The activities of rare earth/lithium amides in catalyzing the amidation of aldehydes and amines were studied, which revealed that the yttrium/lithium complex was highly active for a wide range of substrates, generating 58 examples of amides in 42-99% yields under mild conditions (i.e., room temperature, 3-hour reaction time, additive-free). More importantly, this is the first example of rare earth-based catalysts capable of catalyzing the amidation of primary aliphatic amines.
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Affiliation(s)
- Nadia Ismaeel
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Zhixing Zhuo
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Sajid Imran
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering and Materials Science, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China.
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17
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Zhao F, Russo P, Mancuso R, Gabriele B, Wu XF. Copper-Catalyzed Carbonylative Coupling of Alkyl Iodides with Phenols for the Synthesis of Esters. J Catal 2022. [DOI: 10.1016/j.jcat.2022.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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18
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Ravindar L, Hasbullah SA, Hassan NI, Qin HL. Cross‐Coupling of C‐H and N‐H Bonds: a Hydrogen Evolution Strategy for the Construction of C‐N Bonds. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Lekkala Ravindar
- Universiti Kebangsaan Malaysia Fakulti Teknologi dan Sains Maklumat Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Siti Aishah Hasbullah
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Nurul Izzaty Hassan
- Universiti Kebangsaan Malaysia Fakulti Sains dan Teknologi Chemical Sciences Faculty of Science & Technology 43600 Bandar Baru Bangi MALAYSIA
| | - Hua-Li Qin
- Wuhan University of Technology School of Chemistry 430070 Hubei CHINA
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19
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Ni/g‐C3N4 Photocatalysis: Aerobic Oxidative Coupling Reaction Leading to Amidation of Aldehydes with Amines and C‐N, C‐O, and C‐C Cross‐Coupling Reaction. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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20
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Kang G, Han S. Synthesis of Dimeric Securinega Alkaloid Flueggeacosine B: From Pd-Catalyzed Cross-Coupling to Cu-Catalyzed Cross-Dehydrogenative Coupling. J Am Chem Soc 2022; 144:8932-8937. [PMID: 35576619 DOI: 10.1021/jacs.2c03861] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
We completed the synthesis of dimeric high-oxidation-state securinega alkaloid flueggeacosine B via two synthetic routes from allosecurinine. The first-generation synthesis (seven overall steps) involved a Liebeskind-Srogl cross-coupling reaction for the union of two functionalized fragments, the organostannane and the thioester. As a means to further streamline the synthetic route, we have developed a visible-light-mediated Cu-catalyzed cross-dehydrogenative coupling (CDC) reaction between an aldehyde and an electron-deficient olefin. This enabled the second-generation synthesis of flueggeacosine B from allosecurinine in four overall steps. The newly developed CDC reaction paves a direct way to a conjugated dicarbonyl moiety, a ubiquitous structural moiety present in various natural products.
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Affiliation(s)
- Gyumin Kang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sunkyu Han
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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21
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Wu M, Huang S, Hou H, Lin J, Lin M, Zhou S, Zheng Z, Sun W, Ke F. DIPEA-induced activation of OH - for the synthesis of amides via photocatalysis. RSC Adv 2022; 12:14724-14728. [PMID: 35702194 PMCID: PMC9109258 DOI: 10.1039/d2ra02107b] [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: 04/01/2022] [Accepted: 05/02/2022] [Indexed: 11/21/2022] Open
Abstract
The development of green protocols for photocatalysis where water acts as a nucleophile, induced by a weak organic base, is difficult to achieve in organic chemistry. Herein, an efficient light-mediated strategy for the synthesis of amides in which a weak organic base acts as a reductant to induce the formation of OH– from water under metal-free conditions is reported. A mechanistic study reveals that the generation of an N,N-diisopropylethylamine (DIPEA) radical via single electron transfer (SET), with the assistance of photocatalyst, that increases the nucleophilicity of the water molecules with respect to the cyanides is essential. Moreover, the removal rate of nitrile in wastewater can be as high as 83%, indicating that this strategy has excellent potential for nitrile degradation. Under weak organic base condition DIPEA as a reductant to increase the nucleophilicity of H2O an excellent potential system for nitrile degradation.![]()
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Affiliation(s)
- Mei Wu
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Sheng Huang
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Huiqing Hou
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Jie Lin
- Department of VIP Dental Service, School and Hospital of Stomatology, Fujian Medical University Fuzhou 350002 China
| | - Mei Lin
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Sunying Zhou
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Zhiqiang Zheng
- Department of VIP Dental Service, School and Hospital of Stomatology, Fujian Medical University Fuzhou 350002 China
| | - Weiming Sun
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
| | - Fang Ke
- Institute of Materia Medica, School of Pharmacy, Fujian Provincial Key Laboratory of Natural Medicine Pharmacology, Fujian Medical University Fuzhou 350122 China
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22
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Shan ZW, Chen XY, Zhang H, Liu HY, Yuan G. Copper Porphyrin-catalyzed C(sp3)-H Activation via Cross Dehydrogenative Coupling: Facile Transformation of Aldehydes to Esters. Synlett 2022. [DOI: 10.1055/a-1813-4235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Copper porphyrin-catalyzed alkane C−H bond functionalization with aldehydes via cross dehydrogenative coupling (CDC) using DTBP oxidant has been firstly described in non-solvents or non-additives system. Different aryl/heteroaryl-carboxilic esters were obtained in good to excellent yields depending on the aldehyde derivatives. This CDC reaction catalyzed by copper porphyrin has the advantages of shorter reaction time, lower reaction temperature and catalyst loading as well as the aerobic reaction atmosphere.
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Affiliation(s)
- Zi-Wei Shan
- Department of Chemistry, South China University of Technology, Guangzhou, China
| | - Xiao-Yan Chen
- Department of Chemistry, South China University of Technology, Guangzhou, China
| | - Hao Zhang
- Department of Chemistry, South China University of Technology, Guangzhou, China
| | - Hai-Yang Liu
- Department of Chemistry, South China University of Technology, Guangzhou, China
| | - Gaoqing Yuan
- Department of Chemistry, South China University of Technology, Guangzhou, China
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23
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Govindaraj D, Gopal B. Investigation of the catalytic activity of metallic copper and copper dispersed SiO2 for the reductive acetylation of aromatic nitro compounds. RESEARCH ON CHEMICAL INTERMEDIATES 2022. [DOI: 10.1007/s11164-022-04703-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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24
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Lv X, Xu J, Sun C, Su F, Cai Y, Jin Z, Chi YR. Access to Planar Chiral Ferrocenes via N-Heterocyclic Carbene-Catalyzed Enantioselective Desymmetrization Reactions. ACS Catal 2022. [DOI: 10.1021/acscatal.2c00001] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Xiaokang Lv
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Jun Xu
- School of Pharmacy, Guizhou University of Traditional Chinese Medicine, Huaxi District, Guiyang 550025, China
| | - Cuiyun Sun
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Fen Su
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yuanlin Cai
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Zhichao Jin
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Yonggui Robin Chi
- State Key Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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25
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Highly efficient direct visible-light-mediated oxidative esterification of aldehydes. Photochem Photobiol Sci 2022; 21:819-824. [PMID: 35050487 DOI: 10.1007/s43630-021-00160-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 12/14/2021] [Indexed: 10/19/2022]
Abstract
A very efficient one-pot procedure for the direct oxidation of aldehydes to esters mediated by visible-light is presented. Utilizing a combination of indium triflate and N-bromosuccinimide, NBS, with either ortho-esters or alcohols provided rapid access to a variety of esters. Certain substrates convert fully within a few seconds, other more challenging tert-butyl esters were formed in good yield after no more than 4 h.
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26
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Veisi H, Ebrahimi Z, Karmakar B, Tamoradi T, Ozturk T. A convenient green protocol for oxidative esterification of arylaldehydes over Pd NPs decorated polyplex encapsulated Fe 3O 4 microspheres. Int J Biol Macromol 2022; 200:132-138. [PMID: 34995652 DOI: 10.1016/j.ijbiomac.2021.12.152] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 12/19/2021] [Accepted: 12/23/2021] [Indexed: 12/11/2022]
Abstract
A mild, competent and eco-friendly protocol has been developed for oxidative esterification of various aldehydes over a post-synthetically modified and Pd fabricated chitosan-starch dual functionalized Fe3O4 microspheres as a magnetically isolable heterogeneous and biocompatible nanocatalyst. Molecular O2 was used as an oxidant in the reaction. A series of aldehydes was directly esterified with MeOH in excellent yields without any pre-activation and involvement of harsh chemicals/conditions. Structural features of the catalyst were assessed through FT-IR, FE-SEM, TEM, EDX, molecular mapping, XRD, VSM and ICP-OES techniques. Due to magnetic core, the catalyst was easily isolated using an external magnet and reused for 8 times in succession, retaining its morphology and catalytic activity.
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Affiliation(s)
- Hojat Veisi
- Department of Chemistry, Payame Noor University, Tehran, Iran.
| | - Zahra Ebrahimi
- Department of Chemistry, Payame Noor University, Tehran, Iran
| | - Bikash Karmakar
- Department of Chemistry, Gobardanga Hindu College, 24-Parganas (North), India.
| | - Taiebeh Tamoradi
- Department of Chemistry, Production Technology Research Institute-ACECR, Ahvaz, Iran
| | - Turan Ozturk
- Department of Chemistry, Istanbul Technical University, Maslak, Istanbul 34469, Turkey; TUBITAK-UME, Chemistry Group Laboratories, PO Box 54, 41471, Gebze, Kocaeli, Turkey.
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27
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Chitosan-starch biopolymer modified kaolin supported Pd nanoparticles for the oxidative esterification of aryl aldehydes. Int J Biol Macromol 2021; 191:465-473. [PMID: 34563573 DOI: 10.1016/j.ijbiomac.2021.09.106] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 09/12/2021] [Accepted: 09/15/2021] [Indexed: 12/17/2022]
Abstract
A mild and efficient green protocol has been disclosed for selective oxidative esterification of various aldehydes over a novel Pd fabricated chitosan-starch polyplex encapsulated Kaolin (Kaolin@CS-starch-Pd) as a heterogeneous and reusable biocompatible nanocatalyst. Molecular oxygen was used as an oxidizing agent to generate water as the sole by-product. A wide variety of aldehydes was converted to their methyl esters in high yields. The process involved gentle reaction conditions to avoid any type of pre-activation. Structural features of the catalyst were determined through FT-IR, FE-SEM, TEM, EDX, elemental mapping, XRD and ICP-OES analyses. The material was found to be stable enough toward Pd leaching. Durability of Kaolin@CS-starch-Pd was further justified by retaining its catalytic activity through successful reusability for several times.
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28
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Arp FF, Ashirov R, Bhuvanesh N, Blümel J. Di(hydroperoxy)adamantane adducts: synthesis, characterization and application as oxidizers for the direct esterification of aldehydes. Dalton Trans 2021; 50:15296-15309. [PMID: 34636381 DOI: 10.1039/d1dt03243g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The di(hydroperoxy)adamantane adducts of water (1) and phosphine oxides p-Tol3PO·(HOO)2C(C9H14) (2), o-Tol3PO·(HOO)2C(C9H14) (3), and Cy3PO·(HOO)2C(C9H14) (4), as well as a CH2Cl2 adduct of a phosphole oxide dimer (8), have been created and investigated by multinuclear NMR spectroscopy, and by Raman and IR spectroscopy. The single crystal X-ray structures for 1-4 and 8 are reported. The IR and 31P NMR data are in accordance with strong hydrogen bonding of the di(hydroperoxy)adamantane adducts. The Raman ν(O-O) stretching bands of 1-4 prove that the peroxo groups are present in the solids. Selected di(hydroperoxy)alkane adducts, in combination with AlCl3 as catalyst, have been applied for the direct oxidative esterification of n-nonyl aldehyde, benzaldehyde, p-methylbenzaldehyde, p-bromobenzaldehyde, and o-hydroxybenzaldehyde to the corresponding methyl esters. The esterification takes place in an inert atmosphere, under anhydrous and oxygen-free conditions, within a time frame of 45 minutes to 5 hours at room temperature. Hereby, two oxygen atoms per adduct assembly are active with respect to the quantitative transformation of the aldehyde into the ester.
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Affiliation(s)
- Fabian F Arp
- Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012, USA.
| | - Rahym Ashirov
- Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012, USA.
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012, USA.
| | - Janet Blümel
- Department of Chemistry, Texas A&M University, College Station, TX, 77842-3012, USA.
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29
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Cleavage via Selective Catalytic Oxidation of Lignin or Lignin Model Compounds into Functional Chemicals. CHEMENGINEERING 2021. [DOI: 10.3390/chemengineering5040074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Lignin, a complex aromatic polymer with different types of methoxylated phenylpropanoid connections, enables the sustainable supply of value-added chemicals and biofuels through its use as a feedstock. Despite the development of numerous methodologies that upgrade lignin to high-value chemicals such as drugs and organic synthesis intermediates, the variety of valuable products obtained from lignin is still very limited, mainly delivering hydrocarbons and oxygenates. Using selective oxidation and activation cleavage of lignin, we can obtain value-added aromatics, including phenols, aldehydes, ketones, and carboxylic acid. However, biorefineries will demand a broad spectrum of fine chemicals in the future, not just simple chemicals like aldehydes and ketones containing simple C = O groups. In particular, most n-containing aromatics, which have found important applications in materials science, agro-chemistry, and medicinal chemistry, such as amide, aniline, and nitrogen heterocyclic compounds, are obtained through n-containing reagents mediating the oxidation cleavage in lignin. This tutorial review provides updates on recent advances in different classes of chemicals from the catalytic oxidation system in lignin depolymerization, which also introduces those functionalized products through a conventional synthesis method. A comparison with traditional synthetic strategies reveals the feasibility of the lignin model and real lignin utilization. Promising applications of functionalized compounds in synthetic transformation, drugs, dyes, and textiles are also discussed.
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30
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Guo D, Peng Q, Zhang B, Wang J. Atroposelective Dynamic Kinetic Resolution via In Situ Hemiaminals Catalyzed by N-Heterocyclic Carbene. Org Lett 2021; 23:7765-7770. [PMID: 34569804 DOI: 10.1021/acs.orglett.1c02780] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Axially chiral amino acids and its derivatives are vital building blocks of bioactive molecules, artificial peptides, and asymmetric catalysts. Herein, we report an unprecedented carbene-catalyzed atroposelective dynamic kinetic resolution to access axially chiral amino esters via in situ hemiaminals. This protocol features a broad substrate scope and good functional group tolerance and allows the rapid assembly of axially chiral amino esters in good to high yields with high enantioselectivities.
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Affiliation(s)
- Donghui Guo
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China
| | - Qiupeng Peng
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China
| | - Bei Zhang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China
| | - Jian Wang
- School of Pharmaceutical Sciences, Key Laboratory of Bioorganic Phosphorous Chemistry & Chemical Biology (Ministry of Education), Tsinghua University, Beijing 100084, P. R. China
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31
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Harnying W, Sudkaow P, Biswas A, Berkessel A. N-Heterocyclic Carbene/Carboxylic Acid Co-Catalysis Enables Oxidative Esterification of Demanding Aldehydes/Enals, at Low Catalyst Loading. Angew Chem Int Ed Engl 2021; 60:19631-19636. [PMID: 34010504 PMCID: PMC8457137 DOI: 10.1002/anie.202104712] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 05/10/2021] [Indexed: 01/07/2023]
Abstract
We report the discovery that simple carboxylic acids, such as benzoic acid, boost the activity of N-heterocyclic carbene (NHC) catalysts in the oxidative esterification of aldehydes. A simple and efficient protocol for the transformation of a wide range of sterically hindered α- and β-substituted aliphatic aldehydes/enals, catalyzed by a novel and readily accessible N-Mes-/N-2,4,6-trichlorophenyl 1,2,4-triazolium salt, and benzoic acid as co-catalyst, was developed. A whole series of α/β-substituted aliphatic aldehydes/enals hitherto not amenable to NHC-catalyzed esterification could be reacted at typical catalyst loadings of 0.02-1.0 mol %. For benzaldehyde, even 0.005 mol % of NHC catalyst proved sufficient: the lowest value ever achieved in NHC catalysis. Preliminary studies point to carboxylic acid-induced acceleration of acyl transfer from azolium enolate intermediates as the mechanistic basis of the observed effect.
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Affiliation(s)
- Wacharee Harnying
- Department of Chemistry (Organic Chemistry), University of Cologne, Greinstraße 4, 50939, Cologne, Germany
| | - Panyapon Sudkaow
- Department of Chemistry (Organic Chemistry), University of Cologne, Greinstraße 4, 50939, Cologne, Germany
| | - Animesh Biswas
- Department of Chemistry (Organic Chemistry), University of Cologne, Greinstraße 4, 50939, Cologne, Germany
| | - Albrecht Berkessel
- Department of Chemistry (Organic Chemistry), University of Cologne, Greinstraße 4, 50939, Cologne, Germany
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32
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Harnying W, Sudkaow P, Biswas A, Berkessel A. N‐Heterocyclic Carbene/Carboxylic Acid Co‐Catalysis Enables Oxidative Esterification of Demanding Aldehydes/Enals, at Low Catalyst Loading. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104712] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Wacharee Harnying
- Department of Chemistry (Organic Chemistry) University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Panyapon Sudkaow
- Department of Chemistry (Organic Chemistry) University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Animesh Biswas
- Department of Chemistry (Organic Chemistry) University of Cologne Greinstraße 4 50939 Cologne Germany
| | - Albrecht Berkessel
- Department of Chemistry (Organic Chemistry) University of Cologne Greinstraße 4 50939 Cologne Germany
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33
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Kato M, Ghosh K, Nishii Y, Miura M. Rhodium-catalysed direct formylmethylation using vinylene carbonate and sequential dehydrogenative esterification. Chem Commun (Camb) 2021; 57:8280-8283. [PMID: 34319322 DOI: 10.1039/d1cc03362j] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A rhodium-catalysed direct formylmethylation adopting vinylene carbonate as an ethynol equivalent is reported. The developed catalytic system is further utilised for the oxidant-free production of esters with the liberation of hydrogen gas. Some control experiments are conducted to elucidate the reaction mechanism.
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Affiliation(s)
- Moena Kato
- Department of Applied Chemistry, Graduate School of Engineering, Suita, Osaka 565-0871, Japan.
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34
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Wei P, Zhu K, Cao J, Lin X, Shen X, Duan Z, Li C. Relationship between Micromolecules and Quality Changes of Tilapia Fillets after Partial Freezing Treatment with Polyphenols. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:8213-8226. [PMID: 34264653 DOI: 10.1021/acs.jafc.1c02035] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The study investigated the main characteristic micromolecular changes in tilapia fillets after partial freezing treatment with polyphenols by ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-Q-TOF-MS) analysis. A total of 2121 metabolite ion features were identified. The result suggested that procyanidin treatment increased the sweet, salty, and thick peptides' contents and suppressed the formation of bitter peptides. The levels of cis-4-octenedioic acid, 2-amino-heptanoic acid, indoleacrylic acid, and 2-amino-3-methyl-1-butanol in polyphenol treatments were significantly lower compared to those in the control group (P < 0.05), which delayed the formation of micromolecule of acids and alcohols associated with spoilage and inhibited the protein and lipid oxidation and degradation. Polyphenol treatments suppressed the formation of biogenic amines (lower levels of spermidine and 1-naphthylacetylspermine) and reduced fillet quality deterioration. It provided critical novel insights into the understanding of the molecular mechanism for inhibiting the quality deterioration of fillets treated with polyphenols during storage.
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Affiliation(s)
- Peiyu Wei
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Kexue Zhu
- Spice and Beverage Research Institute, Chinese Academy of Tropical Agricultural Sciences, Wanning 571533, China
| | - Jun Cao
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Xiangdong Lin
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, School of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Xuanri Shen
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
| | - Zhenhua Duan
- Institute of Food Science and Engineering, Hezhou University, Hezhou 542899, China
| | - Chuan Li
- Hainan Provincial Engineering Research Centre of Aquatic Resources Efficient Utilization in the South China Sea, School of Food Science and Engineering, Hainan University, Haikou 570228, China
- Collaborative Innovation Center of Seafood Deep Processing, Dalian Polytechnic University, Dalian 116034, China
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35
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Brown RCD. The Longer Route can be Better: Electrosynthesis in Extended Path Flow Cells. CHEM REC 2021; 21:2472-2487. [PMID: 34302434 DOI: 10.1002/tcr.202100163] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/02/2021] [Indexed: 01/01/2023]
Abstract
This personal account provides an overview of work conducted in my research group, and through collaborations with other chemists and engineers, to develop flow electrolysis cells and apply these cells in organic electrosynthesis. First, a brief summary of my training and background in organic synthesis is provided, leading in to the start of flow electrosynthesis in my lab in collaboration with Derek Pletcher. Our work on the development of extended path electrolysis flow reactors is described from a synthetic organic chemist's perspective, including laboratory scale-up to give several moles of an anodic methoxylation product in one day. The importance of cell design is emphasised with regards to achieving good performance in laboratory electrosynthesis with productivities from hundreds of mg h-1 to many g h-1 , at high conversion in a selective fashion. A simple design of recycle flow cell that can be readily constructed in a small University workshop is also discussed, including simple modifications to improve cell performance. Some examples of flow electrosyntheses are provided, including Shono-type oxidation, anodic cleavage of protecting groups, Hofer-Moest reaction of cubane carboxylic acids, oxidative esterification and amidation of aldehydes, and reduction of aryl halides.
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Affiliation(s)
- Richard C D Brown
- School of Chemistry, The University of Southampton, Highfield, Southampton, SO17 1BJ, UK
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36
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Ma H, Lu G, Han B, Huang G, Zhang Y, Wang JJ. Copper(I)-catalysed aerobic oxidative selective cleavage of C C bond with DMAP: Facile access to N-substituted benzamides. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153199] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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37
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Anbardan SZ, Mokhtari J, Yari A, Bozcheloei AH. Direct synthesis of amides and imines by dehydrogenative homo or cross-coupling of amines and alcohols catalyzed by Cu-MOF. RSC Adv 2021; 11:20788-20793. [PMID: 35479335 PMCID: PMC9034032 DOI: 10.1039/d1ra03142b] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 06/05/2021] [Indexed: 12/21/2022] Open
Abstract
Oxidative dehydrogenative homo-coupling of amines to imines and cross-coupling of amines with alcohols to amides was achieved with high to moderate yields at room temperature in THF using Cu-MOF as an efficient and recyclable heterogeneous catalyst under mild conditions. Different primary benzyl amines and alcohols could be utilized for the synthesis of a wide variety of amides and imines. The Cu-MOF catalyst could be recycled and reused four times without loss of catalytic activity.
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Affiliation(s)
- Soheil Zamani Anbardan
- Department of Chemistry, Science and Research Branch, Islamic Azad University P. O. Box 14515/775 Tehran Iran
| | - Javad Mokhtari
- Department of Chemistry, Science and Research Branch, Islamic Azad University P. O. Box 14515/775 Tehran Iran
| | - Ahmad Yari
- Department of Chemistry, Science and Research Branch, Islamic Azad University P. O. Box 14515/775 Tehran Iran
| | - Abolfazl Hassani Bozcheloei
- Department of Chemistry, Science and Research Branch, Islamic Azad University P. O. Box 14515/775 Tehran Iran
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38
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Nikitas NF, Apostolopoulou MK, Skolia E, Tsoukaki A, Kokotos CG. Photochemical Activation of Aromatic Aldehydes: Synthesis of Amides, Hydroxamic Acids and Esters. Chemistry 2021; 27:7915-7922. [PMID: 33772903 DOI: 10.1002/chem.202100655] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2021] [Indexed: 12/17/2022]
Abstract
A cheap, facile and metal-free photochemical protocol for the activation of aromatic aldehydes has been developed. Utilizing thioxanthen-9-one as the photocatalyst and cheap household lamps as the light source, a variety of aromatic aldehydes have been activated and subsequently converted in a one-pot reaction into amides, hydroxamic acids and esters in good to high yields. The applicability of this method was highlighted in the synthesis of Moclobemide, a drug against depression and social anxiety. Extended and detailed mechanistic studies have been conducted, in order to determine a plausible mechanism for the reaction.
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Affiliation(s)
- Nikolaos F Nikitas
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimioupolis, 15771, Athens, Greece
| | - Mary K Apostolopoulou
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimioupolis, 15771, Athens, Greece
| | - Elpida Skolia
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimioupolis, 15771, Athens, Greece
| | - Anna Tsoukaki
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimioupolis, 15771, Athens, Greece
| | - Christoforos G Kokotos
- Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens Panepistimioupolis, 15771, Athens, Greece
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39
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Kumar U, Sharma A, Kumar N, Kumar Pandey S. Copper‐Catalyzed Chemoselective
O
‐Aroylation of Phenolic Oxime Ethers with Aryl Aldehydes. ChemistrySelect 2021. [DOI: 10.1002/slct.202100809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Upendra Kumar
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Ajay Sharma
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Naveen Kumar
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
| | - Satyendra Kumar Pandey
- Department of Chemistry Institute of Science Banaras Hindu University Varanasi 221005 India
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40
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Xie P, Shi S, Hu X, Xue C, Du D. Sunlight Photocatalytic Synthesis of Aryl Hydrazides by Decatungstate‐Promoted Acylation under Room Temperature. ChemistrySelect 2021. [DOI: 10.1002/slct.202100808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Pan Xie
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry Shaanxi University of Science & Technology Xi'an 710021 China
| | - Sanshan Shi
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry Shaanxi University of Science & Technology Xi'an 710021 China
| | - Xueqing Hu
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry Shaanxi University of Science & Technology Xi'an 710021 China
| | - Cheng Xue
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry Shaanxi University of Science & Technology Xi'an 710021 China
| | - Dongdong Du
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry Shaanxi University of Science & Technology Xi'an 710021 China
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41
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Kumar U, Sharma A, Kumar N, Pandey SK. Copper-catalyzed chemoselective oxidative o-aroylation of 2-acetylphenols, alkyl salicylates and 1,3-dicarbonyl compounds using styrene derivatives. Tetrahedron 2021. [DOI: 10.1016/j.tet.2021.132000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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42
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Vetica F, Bortolami M, Petrucci R, Rocco D, Feroci M. Electrogenerated NHCs in Organic Synthesis: Ionic Liquids vs Organic Solvents Effects. CHEM REC 2021; 21:2130-2147. [PMID: 33507627 DOI: 10.1002/tcr.202000178] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/08/2021] [Indexed: 12/14/2022]
Abstract
In the last twenty years, N-heterocyclic carbenes (NHCs) have been extensively studied for their application as organocatalysts in stereoselective synthesis as well as ligands for transition metals-promoted synthetic methodologies. Derived mainly from azolium salts, NHCs have demonstrated exceptional versatility in their generation usually performed by deprotonation or reduction (chemical or electrochemical). In particular, the generation of NHC under electrochemical conditions, starting from azolium-based ionic liquids, has proven to be a successful green approach and demonstrated wide applicability in organic synthesis. In this Personal Account, the application of electrogenerated NHCs in organic synthesis will be discussed, with a particular attention to the different reactivity in ionic liquids compared to classical organic solvents.
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Affiliation(s)
- Fabrizio Vetica
- Department of Chemistry, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185, Rome, Italy
| | - Martina Bortolami
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Castro Laurenziano 7, 00161, Rome, Italy
| | - Rita Petrucci
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Castro Laurenziano 7, 00161, Rome, Italy
| | - Daniele Rocco
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Castro Laurenziano 7, 00161, Rome, Italy
| | - Marta Feroci
- Department of Basic and Applied Sciences for Engineering (SBAI), Sapienza University of Rome, Via Castro Laurenziano 7, 00161, Rome, Italy
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43
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Bhowmick A, Warghude PK, Dharpure PD, Bhat RG. Direct access to α-acyloxycarbonyl compounds and esters via oxidative esterification of aldehydes under visible light. Org Chem Front 2021. [DOI: 10.1039/d1qo00731a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient synthesis of α-acyloxycarbonyl compounds and esters from aldehydes and α-bromocarbonyl compounds/benzyl bromide derivatives via photoredox catalysis has been developed.
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Affiliation(s)
- Anindita Bhowmick
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Prakash K. Warghude
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Pankaj D. Dharpure
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
| | - Ramakrishna G. Bhat
- Department of Chemistry, Indian Institute of Science Education and Research (IISER) Pune, Dr. Homi Bhabha Road, Pashan, 411008, Maharashtra, India
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44
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Arora V, Narjinari H, Nandi PG, Kumar A. Recent advances in pincer-nickel catalyzed reactions. Dalton Trans 2021; 50:3394-3428. [PMID: 33595564 DOI: 10.1039/d0dt03593a] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Organometallic catalysts have played a key role in accomplishing numerous synthetically valuable organic transformations that are either otherwise not possible or inefficient. The use of precious, sparse and toxic 4d and 5d metals are an apparent downside of several such catalytic systems despite their immense success over the last several decades. The use of complexes containing Earth-abundant, inexpensive and less hazardous 3d metals, such as nickel, as catalysts for organic transformations has been an emerging field in recent times. In particular, the versatile nature of the corresponding pincer-metal complexes, which offers great control of their reactivity via countless variations, has garnered great interest among organometallic chemists who are looking for greener and cheaper alternatives. In this context, the current review attempts to provide a glimpse of recent developments in the chemistry of pincer-nickel catalyzed reactions. Notably, there have been examples of pincer-nickel catalyzed reactions involving two electron changes via purely organometallic mechanisms that are strikingly similar to those observed with heavier Pd and Pt analogues. On the other hand, there have been distinct differences where the pincer-nickel complexes catalyze single-electron radical reactions. The applicability of pincer-nickel complexes in catalyzing cross-coupling reactions, oxidation reactions, (de)hydrogenation reactions, dehydrogenative coupling, hydrosilylation, hydroboration, C-H activation and carbon dioxide functionalization has been reviewed here from synthesis and mechanistic points of view. The flurry of global pincer-nickel related activities offer promising avenues in catalyzing synthetically valuable organic transformations.
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Affiliation(s)
- Vinay Arora
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Himani Narjinari
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Pran Gobinda Nandi
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India.
| | - Akshai Kumar
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India. and Centre for Nanotechnology, Indian Institute of Technology Guwahati, Guwahati-781039, Assam, India
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45
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da Silva MJ, de Oliveira CM. Metal nitrate-catalyzed one-pot oxidative esterification of benzaldehyde with hydrogen peroxide in alcoholic solutions at room temperature. NEW J CHEM 2021. [DOI: 10.1039/d0nj05671e] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ferric nitrate was the most active and selective metal nitrate catalyst in the one-pot synthesis of alkyl esters from benzaldehyde with hydrogen peroxide at room temperature.
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46
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Ma R, Chen X, Xiao Z, Natarajan M, Lu C, Jiang X, Zhong W, Liu X. Beckmann rearrangement of ketoximes promoted by cyanuric chloride and dimethyl sulfoxide under a mild condition. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152707] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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47
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Narula AK, Singh A. Copper and N-Heterocyclic Carbene-Catalyzed Oxidative Amidation of Aldehydes with Amines. Synlett 2020. [DOI: 10.1055/a-1343-5203] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
AbstractA one-pot two-step oxidative process has been developed for the tert-butyl hydroperoxide mediated transformation of aldehydes and amines into amides catalyzed by copper(I) iodide and an N-heterocyclic carbene. The process is additive-free and does not require the amine to be transformed into its hydrochloride salts. The method is simple and practicable, has a broad substrate scope, and uses economical, feasible, and abundant reagents.
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48
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Vijayapritha S, Viswanathamurthi P. New half-sandwich (η6-p-cymene)ruthenium(II) complexes with benzothiazole hydrazone Schiff base ligand: Synthesis, structural characterization and catalysis in transamidation of carboxamide with primary amines. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121555] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Wu YF, Tsai YF, Huang YS, Shih JF. Total Synthesis of the Echinodermatous Ganglioside LLG-3 Possessing the Biological Function of Promoting the Neurite Outgrowth. Org Lett 2020; 22:7491-7495. [PMID: 32965122 DOI: 10.1021/acs.orglett.0c02692] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A total synthesis of echinodermatous ganglioside LLG-3 with neuritogenic activity was accomplished by a convergent strategy. The synthesis of 2-hydroxyethyl 8-O-Me-α-sialoside 2 was started from the phenyl 7,8-di-O-Pico-thiosialoside 5, which can be chemoselectively removed the picoloyl group, and then the methyl group in 8-O-MeNeu5Ac moiety was chemoselectively prepared using TMSCHN2/FeCl3. For preparation of the terminal disialic unit, oxidative amidation was initially utilized by our group to efficiently construct the α(2,11) linkage of 8-O-Me-Neu5Acα(2,11)Neu5Gc. Herein, we also demonstrate that the synthesized ganglioside LLG-3 exhibited the neuritogenic activity toward the primary cortical neurons and that biological activity is superior to that of ganglioside DSG-A.
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Affiliation(s)
- Yu-Fa Wu
- Department of Chemistry, Chung Yuan Christian University, 200 Zhongbei Road, Chung Li District, Taoyuan City 32023, Taiwan
| | - Yow-Fu Tsai
- Department of Chemistry, Chung Yuan Christian University, 200 Zhongbei Road, Chung Li District, Taoyuan City 32023, Taiwan
| | - Yuahn-Sieh Huang
- Department of Biology and Anatomy, National Defense Medical Center, 161 Section 6, Minquan East Road, Neihu District, Taipei City 11490, Taiwan
| | - Jing-Feng Shih
- Department of Chemistry, Chung Yuan Christian University, 200 Zhongbei Road, Chung Li District, Taoyuan City 32023, Taiwan
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50
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Yang GP, Li K, Liu W, Zeng K, Liu YF. Copper-catalyzed aerobic oxidative C-C bond cleavage of simple ketones for the synthesis of amides. Org Biomol Chem 2020; 18:6958-6964. [PMID: 32936187 DOI: 10.1039/d0ob01601b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Cu-catalyzed oxidative amidation of simple ketones with amines via carbon-carbon (C-C) bond cleavage has been developed. A number of aryl and alkyl ketones could be easily converted to amides using cheap copper salt as the catalyst and O2 as the oxidant with a wide range of amines, including primary and secondary amines. This method shows a notable advantage of the broad scope for the substrate, thus providing a practical approach to amides. A plausible mechanism is proposed based on the preliminary experiments.
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Affiliation(s)
- Guo-Ping Yang
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang 330013, People's Republic of China.
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