201
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Abstract
We present an overview of the synthetic strategies and methodologies for stable organic radical polymers, and summarise their applications in diverse areas.
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Affiliation(s)
- Kai Zhang
- Australian Institute for Bioengineering and Nanotechnology
- University of Queensland
- Brisbane 4072
- Australia
| | - Michael J. Monteiro
- Australian Institute for Bioengineering and Nanotechnology
- University of Queensland
- Brisbane 4072
- Australia
| | - Zhongfan Jia
- Australian Institute for Bioengineering and Nanotechnology
- University of Queensland
- Brisbane 4072
- Australia
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202
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Hou J, Luan Y, Yu J, Qi Y, Wang G, Lu Y. Fabrication of hierarchical composite microspheres of copper-doped Fe3O4@P4VP@ZIF-8 and their application in aerobic oxidation. NEW J CHEM 2016. [DOI: 10.1039/c6nj02239a] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Copper-doped Fe3O4@P4VP@ZIF-8 composite microspheres were fabricated for application in the highly efficient aerobic oxidation of alcohols and epoxidation of olefins.
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Affiliation(s)
- Junying Hou
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Yi Luan
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Jie Yu
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Yue Qi
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Ge Wang
- Beijing Key Laboratory of Function Materials for Molecule & Structure Construction
- School of Materials Science and Engineering
- University of Science and Technology Beijing
- Beijing 100083
- P. R. China
| | - Yunfeng Lu
- Department of Materials Science and Engineering
- University of California
- Los Angeles
- USA
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203
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Wang L, Bie Z, Shang S, Lv Y, Li G, Niu J, Gao S. Bioinspired aerobic oxidation of alcohols with a bifunctional ligand based on bipyridine and TEMPO. RSC Adv 2016. [DOI: 10.1039/c6ra05536b] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A new bifunctional ligand bearing bipyridine and TEMPO in combination with copper for the oxidation of alcohols was developed.
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Affiliation(s)
- Lianyue Wang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy (DNL)
- Dalian
- China
| | - Zhixing Bie
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Sensen Shang
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy (DNL)
- Dalian
- China
| | - Ying Lv
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy (DNL)
- Dalian
- China
| | - Guosong Li
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy (DNL)
- Dalian
- China
| | - Jingyang Niu
- Henan Key Laboratory of Polyoxometalate Chemistry
- Institute of Molecular and Crystal Engineering
- College of Chemistry and Chemical Engineering
- Henan University
- Kaifeng
| | - Shuang Gao
- Dalian Institute of Chemical Physics
- Chinese Academy of Sciences
- Dalian National Laboratory for Clean Energy (DNL)
- Dalian
- China
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204
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Diverse copper(II) complexes with simple nitrogen ligands: Structural characterization and applications in aerobic alcohol oxidations in water. Polyhedron 2016. [DOI: 10.1016/j.poly.2015.01.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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205
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Kärkäs MD, Åkermark B. Water oxidation using earth-abundant transition metal catalysts: opportunities and challenges. Dalton Trans 2016; 45:14421-61. [DOI: 10.1039/c6dt00809g] [Citation(s) in RCA: 181] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Catalysts for the oxidation of water are a vital component of solar energy to fuel conversion technologies. This Perspective summarizes recent advances in the field of designing homogeneous water oxidation catalysts (WOCs) based on Mn, Fe, Co and Cu.
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Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
| | - Björn Åkermark
- Department of Organic Chemistry
- Arrhenius Laboratory
- Stockholm University
- SE-106 91 Stockholm
- Sweden
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206
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Oveisi AR, Khorramabadi-zad A, Daliran S. Iron-based metal–organic framework, Fe(BTC): an effective dual-functional catalyst for oxidative cyclization of bisnaphthols and tandem synthesis of quinazolin-4(3H)-ones. RSC Adv 2016. [DOI: 10.1039/c5ra19013d] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Fe(BTC) catalyzed synthesis of spirodienones and quinazolin-4(3H)-ones.
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Affiliation(s)
| | | | - Saba Daliran
- Faculty of Chemistry
- Bu-Ali Sina University
- Hamedan
- Iran
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207
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Gemoets HPL, Su Y, Shang M, Hessel V, Luque R, Noël T. Liquid phase oxidation chemistry in continuous-flow microreactors. Chem Soc Rev 2016. [DOI: 10.1039/c5cs00447k] [Citation(s) in RCA: 363] [Impact Index Per Article: 45.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
This review gives an exhaustive overview of the engineering principles, safety aspects and chemistry associated with liquid phase oxidation in continuous-flow microreactors.
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Affiliation(s)
- Hannes P. L. Gemoets
- Department of Chemical Engineering and Chemistry
- Micro Flow Chemistry & Process Technology
- Eindhoven University of Technology
- 5612 AZ Eindhoven
- The Netherlands
| | - Yuanhai Su
- Department of Chemical Engineering and Chemistry
- Micro Flow Chemistry & Process Technology
- Eindhoven University of Technology
- 5612 AZ Eindhoven
- The Netherlands
| | - Minjing Shang
- Department of Chemical Engineering and Chemistry
- Micro Flow Chemistry & Process Technology
- Eindhoven University of Technology
- 5612 AZ Eindhoven
- The Netherlands
| | - Volker Hessel
- Department of Chemical Engineering and Chemistry
- Micro Flow Chemistry & Process Technology
- Eindhoven University of Technology
- 5612 AZ Eindhoven
- The Netherlands
| | - Rafael Luque
- Departamento de Quimica Organica
- Universidad de Cordoba
- E14014 Cordoba
- Spain
| | - Timothy Noël
- Department of Chemical Engineering and Chemistry
- Micro Flow Chemistry & Process Technology
- Eindhoven University of Technology
- 5612 AZ Eindhoven
- The Netherlands
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208
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Pünner F, Sohtome Y, Sodeoka M. Solvent-dependent copper-catalyzed synthesis of pyrazoles under aerobic conditions. Chem Commun (Camb) 2016; 52:14093-14096. [DOI: 10.1039/c6cc06935e] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We have developed a copper-catalyzed oxidative cyclization of hydrazones under aerobic conditions, enabling solvent-dependent selective synthesis of different pyrazoles.
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Affiliation(s)
- Florian Pünner
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
| | - Yoshihiro Sohtome
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
| | - Mikiko Sodeoka
- Synthetic Organic Chemistry Laboratory
- Saitama 351-0198
- Japan
- RIKEN Center for Sustainable Resource Science
- Saitama 351-0198
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209
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Guo B, Xue JY, Li HX, Tan DW, Lang JP. Design of recyclable TEMPO derivatives bearing an ionic liquid moiety and N,N-bidentate group for highly efficient Cu(i)-catalyzed conversion of alcohols into aldehydes and imines. RSC Adv 2016. [DOI: 10.1039/c6ra10373a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Recyclable TEMPO derivatives carrying an ionic liquid moiety and N,N-bidentate group are designed for Cu(i)-catalyzed alcohol to aldehyde and imine conversion.
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Affiliation(s)
- Bin Guo
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Jiang-Yan Xue
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Hong-Xi Li
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Da-Wei Tan
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
| | - Jian-Ping Lang
- State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials
- College of Chemistry
- Chemical Engineering and Materials Science
- Soochow University
- Suzhou 215123
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210
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Karimi B, Vahdati S, Vali H. Synergistic catalysis within TEMPO-functionalized periodic mesoporous organosilica with bridge imidazolium groups in the aerobic oxidation of alcohols. RSC Adv 2016. [DOI: 10.1039/c6ra15483b] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Anchoring TEMPO within the nanospaces of a PMO with bridged imidazolium groups led to an powerful bifunctional catalyst (TEMPO@PMO-IL-Br), which showed enhanced activity in the metal-free aerobic oxidation of alcohols.
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Affiliation(s)
- Babak Karimi
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
| | - Saleh Vahdati
- Department of Chemistry
- Institute for Advanced Studies in Basic Sciences (IASBS)
- Zanjan 45137-6731
- Iran
| | - Hojatollah Vali
- Department of Anatomy and Cell Biology
- Facility for Electron Microscopy Research
- McGill University
- Montreal
- H3A 2A7 Canada
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211
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McCann SD, Stahl SS. Mechanism of Copper/Azodicarboxylate-Catalyzed Aerobic Alcohol Oxidation: Evidence for Uncooperative Catalysis. J Am Chem Soc 2015; 138:199-206. [PMID: 26694091 DOI: 10.1021/jacs.5b09940] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Cooperative catalysis between Cu(II) and redox-active organic cocatalysts is a key feature of important chemical and enzymatic aerobic oxidation reactions, such as alcohol oxidation mediated by Cu/TEMPO and galactose oxidase. Nearly 20 years ago, Markó and co-workers reported that azodicarboxylates, such as di-tert-butyl azodicarboxylate (DBAD), are effective redox-active cocatalysts in Cu-catalyzed aerobic alcohol oxidation reactions [Markó, I. E., et al. Science 1996, 274, 2044], but the nature of the cooperativity between Cu and azodicarboxylates is not well understood. Here, we report a mechanistic study of Cu/DBAD-catalyzed aerobic alcohol oxidation. In situ infrared spectroscopic studies reveal a burst of product formation prior to steady-state catalysis, and gas-uptake measurements show that no O2 is consumed during the burst. Kinetic studies reveal that the anaerobic burst and steady-state turnover have different rate laws. The steady-state rate does not depend on [O2] or [DBAD]. These results, together with other EPR and in situ IR spectroscopic and kinetic isotope effect studies, reveal that the steady-state mechanism consists of two interdependent catalytic cycles that operate in sequence: a fast Cu(II)/DBAD pathway, in which DBAD serves as the oxidant, and a slow Cu(II)-only pathway, in which Cu(II) is the oxidant. This study provides significant insight into the redox cooperativity, or lack thereof, between Cu and redox-active organic cocatalysts in aerobic oxidation reactions.
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Affiliation(s)
- Scott D McCann
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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212
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Wendlandt AE, Stahl SS. Quinone-Catalyzed Selective Oxidation of Organic Molecules. Angew Chem Int Ed Engl 2015; 54:14638-58. [PMID: 26530485 PMCID: PMC4859943 DOI: 10.1002/anie.201505017] [Citation(s) in RCA: 241] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 01/12/2023]
Abstract
Quinones are common stoichiometric reagents in organic chemistry. Para-quinones with high reduction potentials, such as DDQ and chloranil, are widely used and typically promote hydride abstraction. In recent years, many catalytic applications of these methods have been achieved by using transition metals, electrochemistry, or O2 to regenerate the oxidized quinone in situ. Complementary studies have led to the development of a different class of quinones that resemble the ortho-quinone cofactors in copper amine oxidases and mediate the efficient and selective aerobic and/or electrochemical dehydrogenation of amines. The latter reactions typically proceed by electrophilic transamination and/or addition-elimination reaction mechanisms, rather than hydride abstraction pathways. The collective observations show that the quinone structure has a significant influence on the reaction mechanism and has important implications for the development of new quinone reagents and quinone-catalyzed transformations.
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Affiliation(s)
- Alison E Wendlandt
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706 (USA)
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706 (USA).
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213
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Rafiee M, Miles KC, Stahl SS. Electrocatalytic Alcohol Oxidation with TEMPO and Bicyclic Nitroxyl Derivatives: Driving Force Trumps Steric Effects. J Am Chem Soc 2015; 137:14751-7. [PMID: 26505317 DOI: 10.1021/jacs.5b09672] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Bicyclic nitroxyl derivatives, such as 2-azaadamantane N-oxyl (AZADO) and 9-azabicyclo[3.3.1]nonane N-oxyl (ABNO), have emerged as highly effective alternatives to TEMPO-based catalysts for selective oxidation reactions (TEMPO = 2,2,6,6-tetramethyl-1-piperidine N-oxyl). Their efficacy is widely attributed to their smaller steric profile; however, electrocatalysis studies described herein show that the catalytic activity of nitroxyls is more strongly affected by the nitroxyl/oxoammonium redox potential than by steric effects. The inexpensive, high-potential TEMPO derivative, 4-acetamido-TEMPO (ACT), exhibits higher electrocatalytic activity than AZADO and ABNO for the oxidation of primary and secondary alcohols. Mechanistic studies provide insights into the origin of these unexpected reactivity trends. The superior activity of ACT is especially noteworthy at high pH, where bicyclic nitroxyls are inhibited by formation of an oxoammonium hydroxide adduct.
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Affiliation(s)
- Mohammad Rafiee
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Kelsey C Miles
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison , 1101 University Avenue, Madison, Wisconsin 53706, United States
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214
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Noh JH, Kim J. Aerobic Oxidative Conversion of Aromatic Aldehydes to Nitriles Using a Nitroxyl/NOx Catalyst System. J Org Chem 2015; 80:11624-8. [DOI: 10.1021/acs.joc.5b02333] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Ji-Hyun Noh
- Department of Chemistry and
Research Institute of Natural Sciences, Incheon National University, Incheon 22012, Republic of Korea
| | - Jinho Kim
- Department of Chemistry and
Research Institute of Natural Sciences, Incheon National University, Incheon 22012, Republic of Korea
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215
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Wendlandt AE, Stahl SS. Chinon‐katalysierte, selektive Oxidation organischer Moleküle. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201505017] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Alison E. Wendlandt
- Department of Chemistry, University of Wisconsin‐Madison, 1101 University Avenue, Madison, Wisconsin 53706 (USA)
| | - Shannon S. Stahl
- Department of Chemistry, University of Wisconsin‐Madison, 1101 University Avenue, Madison, Wisconsin 53706 (USA)
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216
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Zhang Z, Gao Y, Liu Y, Li J, Xie H, Li H, Wang W. Organocatalytic Aerobic Oxidation of Benzylic sp3 C–H Bonds of Ethers and Alkylarenes Promoted by a Recyclable TEMPO Catalyst. Org Lett 2015; 17:5492-5. [DOI: 10.1021/acs.orglett.5b02877] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Zhiguang Zhang
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Yuan Gao
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Yuan Liu
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Jianjun Li
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Hexin Xie
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Hao Li
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
| | - Wei Wang
- Shanghai
Key Laboratory of New Drug Design, School of Pharmacy, and State Key
Laboratory of Bioengineering Reactor, East China University of Science and Technology, 130 Mei-long Road, Shanghai 200237, China
- Department
of Chemistry and Chemical Biology, University of New Mexico, Albuquerque, New Mexico 87131-0001, United States
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217
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Steves JE, Stahl SS. Stable TEMPO and ABNO Catalyst Solutions for User-Friendly (bpy)Cu/Nitroxyl-Catalyzed Aerobic Alcohol Oxidation. J Org Chem 2015; 80:11184-8. [DOI: 10.1021/acs.joc.5b01950] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Janelle E. Steves
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
| | - Shannon S. Stahl
- Department
of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, United States
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218
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Liu E, Zhang YZ, Li L, Yang C, Fettinger JC, Zhang G. New copper(II) species from the copper/2,2′-bypyridine and copper/4-dimethylaminopyridine catalyzed aerobic alcohol oxidations. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.080] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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219
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Zhang YC, Huang R, Lü FL, Cao XH, Zhao JQ. Aerobic oxidation of alcohols by copper(I)/benzoxazine ligand/TEMPO under mild and base-free conditions. RUSS J GEN CHEM+ 2015. [DOI: 10.1134/s1070363215080277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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220
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Zhang P, Deng J, Mao J, Li H, Wang Y. Selective aerobic oxidation of alcohols by a mesoporous graphitic carbon nitride/N-hydroxyphthalimide system under visible-light illumination at room temperature. CHINESE JOURNAL OF CATALYSIS 2015. [DOI: 10.1016/s1872-2067(15)60871-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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221
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Gerken J, Stahl SS. High-Potential Electrocatalytic O2 Reduction with Nitroxyl/NO x Mediators: Implications for Fuel Cells and Aerobic Oxidation Catalysis. ACS CENTRAL SCIENCE 2015; 1:234-43. [PMID: 27162977 PMCID: PMC4827547 DOI: 10.1021/acscentsci.5b00163] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2015] [Indexed: 05/08/2023]
Abstract
Efficient reduction of O2 to water is a central challenge in energy conversion and many aerobic oxidation reactions. Here, we show that the electrochemical oxygen reduction reaction (ORR) can be achieved at high potentials by using soluble organic nitroxyl and nitrogen oxide (NO x ) mediators. When used alone, neither organic nitroxyls, such as 2,2,6,6-tetramethyl-1-piperidinyl-N-oxyl (TEMPO), nor NO x species, such as sodium nitrite, are effective ORR mediators. The combination of nitroxyl/NO x species, however, mediates sustained O2 reduction with overpotentials as low as 300 mV in acetonitrile containing trifluoroacetic acid. Mechanistic analysis of the coupled redox reactions supports a process in which the nitrogen oxide catalyst drives aerobic oxidation of a nitroxyl mediator to an oxoammonium species, which then is reduced back to the nitroxyl at the cathode. The electrolysis potential is dictated by the oxoammonium/nitroxyl reduction potential. The overpotentials accessible with this ORR system are significantly lower than widely studied molecular metal-macrocycle ORR catalysts and benefit from the mechanism-based specificity for four-electron reduction of oxygen to water mediated by NO x species, together with kinetically efficient reduction of oxidized NO x species by TEMPO and other organic nitroxyls.
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222
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Hamlin TA, Kelly CB, Ovian JM, Wiles RJ, Tilley LJ, Leadbeater NE. Toward a Unified Mechanism for Oxoammonium Salt-Mediated Oxidation Reactions: A Theoretical and Experimental Study Using a Hydride Transfer Model. J Org Chem 2015; 80:8150-67. [DOI: 10.1021/acs.joc.5b01240] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Trevor A. Hamlin
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Christopher B. Kelly
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - John M. Ovian
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Rebecca J. Wiles
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
| | - Leon J. Tilley
- Department
of Chemistry, Stonehill College, 320 Washington Street, Easton, Massachusetts 02357, United States
| | - Nicholas E. Leadbeater
- Department
of Chemistry, University of Connecticut, 55 North Eagleville Road, Storrs, Connecticut 06269, United States
- Department of Community Medicine & Health Care, University of Connecticut Health Center, The Exchange, 263 Farmington Avenue, Farmington, Connecticut 06030, United States
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223
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Steves JE, Preger Y, Martinelli JR, Welch CJ, Root TW, Hawkins JM, Stahl SS. Process Development of CuI/ABNO/NMI-Catalyzed Aerobic Alcohol Oxidation. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00179] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Janelle E. Steves
- Department
of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Yuliya Preger
- Department
of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Joseph R. Martinelli
- Lilly
Research Laboratories, Eli Lilly and Company, Indianapolis, Indiana 46285, United States
| | - Christopher J. Welch
- Department of Process & Analytical Chemistry, Merck Research Laboratories, Rahway, New Jersey 07065, United States
| | - Thatcher W. Root
- Department
of Chemical and Biological Engineering, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
| | - Joel M. Hawkins
- Pfizer Worldwide R&D, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Shannon S. Stahl
- Department
of Chemistry, University of Wisconsin—Madison, Madison, Wisconsin 53706, United States
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224
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Imaoka T, Kitazawa H, Chun W, Yamamoto K. Finding the Most Catalytically Active Platinum Clusters With Low Atomicity. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/anie.201504473] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Takane Imaoka
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
| | - Hirokazu Kitazawa
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
| | - Wang‐Jae Chun
- Graduate School of Arts and Sciences, International Christian University, Mitaka, Tokyo 181‐8585 (Japan)
| | - Kimihisa Yamamoto
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226‐8503 (Japan)
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225
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Imaoka T, Kitazawa H, Chun WJ, Yamamoto K. Finding the Most Catalytically Active Platinum Clusters With Low Atomicity. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201504473] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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226
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Ciriminna R, Pandarus V, Béland F, Xu YJ, Pagliaro M. Heterogeneously Catalyzed Alcohol Oxidation for the Fine Chemical Industry. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00204] [Citation(s) in RCA: 72] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rosaria Ciriminna
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via Ugo La Malfa 153, 90146 Palermo, Italy
| | - Valerica Pandarus
- SiliCycle, 2500 Boulevard
du Parc Technologique, Québec, QC G1P 4S6, Canada
| | - Francois Béland
- SiliCycle, 2500 Boulevard
du Parc Technologique, Québec, QC G1P 4S6, Canada
| | - Yi-Jun Xu
- State
Key Laboratory of Photocatalysis on Energy and Environment, College
of Chemistry, Fuzhou University, New
Campus, Fuzhou 350108, People’s Republic of China
| | - Mario Pagliaro
- Istituto per lo Studio dei Materiali Nanostrutturati, CNR, via Ugo La Malfa 153, 90146 Palermo, Italy
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227
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McCann SD, Stahl SS. Copper-Catalyzed Aerobic Oxidations of Organic Molecules: Pathways for Two-Electron Oxidation with a Four-Electron Oxidant and a One-Electron Redox-Active Catalyst. Acc Chem Res 2015; 48:1756-66. [PMID: 26020118 DOI: 10.1021/acs.accounts.5b00060] [Citation(s) in RCA: 356] [Impact Index Per Article: 39.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Selective oxidation reactions have extraordinary value in organic chemistry, ranging from the conversion of petrochemical feedstocks into industrial chemicals and polymer precursors to the introduction of heteroatom functional groups into pharmaceutical and agrochemical intermediates. Molecular oxygen (O2) would be the ideal oxidant for these transformations. Whereas many commodity-scale oxidations of simple hydrocarbon feedstocks employ O2 as an oxidant, methods for selective oxidation of more complex molecules bearing diverse functional groups are often incompatible with existing aerobic oxidation methods. The latter limitation provides the basis for our interest in the development of new catalytic transformations and the elucidation of mechanistic principles that underlie selective aerobic oxidation reactions. One challenge inherent in such methods is the incommensurate redox stoichiometry associated with the use of O2, a four-electron oxidant, in reactions that achieve two-electron oxidation of organic molecules. This issue is further complicated by the use of first-row transition-metal catalysts, which tend to undergo facile one-electron redox steps. In recent years, we have been investigating Cu-catalyzed aerobic oxidation reactions wherein the complexities just noted are clearly evident. This Account surveys our work in this area, which has emphasized three general classes of reactions: (1) single-electron-transfer reactions for oxidative functionalization of electron-rich substrates, such as arenes and heterocycles; (2) oxidative carbon-heteroatom bond-forming reactions, including C-H oxidations, that proceed via organocopper(III) intermediates; and (3) methods for aerobic oxidation of alcohols and amines that use Cu(II) in combination with an organic redox-active cocatalyst to dehydrogenate the carbon-heteroatom bond. These reaction classes demonstrate three different pathways to achieve two-electron oxidation of organic molecules via the cooperative involvement of two one-electron oxidants, either two Cu(II) species or Cu(II) and a nitroxyl cocatalyst. They show the ability of Cu to participate in traditional organometallic steps commonly associated with precious-metal catalysts, such as C-H activation and reductive elimination, but also demonstrate the accessibility of reaction steps not typically associated with precious-metal catalysts, such as single-electron transfer. Many of the Cu-catalyzed reactions offer advantages over analogous two-electron oxidation reactions mediated by palladium or other noble metals. For example, carbon-heteroatom oxidative coupling reactions in the first two reaction classes noted above are capable of using O2 as the terminal oxidant, while analogous reactions with Pd commonly require less desirable oxidants, such as hypervalent iodine or electrophilic halogen sources. In addition, the alcohol and amine oxidations in the third reaction class are significantly more efficient and show much broader scope and functional group tolerance than related Pd-catalyzed reactions. The mechanistic basis for these differences are described herein.
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Affiliation(s)
- Scott D. McCann
- Department
of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S. Stahl
- Department
of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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228
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García-Cabeza AL, Marín-Barrios R, Moreno-Dorado FJ, Ortega MJ, Vidal H, Gatica JM, Massanet GM, Guerra FM. Acyloxylation of 1,4-Dioxanes and 1,4-Dithianes Catalyzed by a Copper–Iron Mixed Oxide. J Org Chem 2015; 80:6814-21. [DOI: 10.1021/acs.joc.5b01043] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ana Leticia García-Cabeza
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Rubén Marín-Barrios
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - F. Javier Moreno-Dorado
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - María J. Ortega
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Hilario Vidal
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - José M. Gatica
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Guillermo M. Massanet
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Francisco M. Guerra
- Departamento
de Química Orgánica and ‡Departamento de Ciencia de los Materiales
e Ingeniería Metalúrgica y Química Inorgánica, Facultad de Ciencias, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
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229
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230
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Gaona MÁ, Montilla F, Álvarez E, Galindo A. Synthesis, characterization and structure of nickel and copper compounds containing ligands derived from keto-enehydrazines and their catalytic application for aerobic oxidation of alcohols. Dalton Trans 2015; 44:6516-25. [PMID: 25756702 DOI: 10.1039/c5dt00358j] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Ligand precursors HL(R,Ph) (R = Me, Ph) were synthesised by condensation of acetylacetone and the corresponding N,N-substituted hydrazines and were characterised spectroscopically and structurally. Both in the solid state and in solution they behave as (Z)-keto-enehydrazines and this was confirmed by DFT calculations which showed that this form was the most stable of their possible tautomers. The reaction of HL(R,Ph) compounds with copper acetate and nickel acetate in EtOH afforded the corresponding complexes [M(L(R,Ph))2] (M = Cu, Ni; R = Me, Ph). The methyl-substituted derivatives were structurally characterised by X-ray methods. A four-coordinate environment around the metal centre, where the two L(Me,Ph) ligands act as bidentate N,O-chelators and lie in a pseudo-trans conformation, was found for both compounds. The dihedral angle between the two six-membered metallacycles M(L(Me,Ph)) was 0° for nickel, a typical square planar coordination, meanwhile it was 23° for copper, a square planar slightly distorted to pseudotetrahedral coordination. Copper complexes [Cu(L(R,Ph))2] were tested as catalysts, in combination with TEMPO (2,2,6,6-tetramethylpiperidine-N-oxyl radical), for the aerobic oxidation of 4-nitrobenzyl alcohol as the model reaction. An almost complete conversion to the corresponding aldehyde was observed after 1 h at 60 °C and 1 bar of dioxygen, in toluene as the solvent. Importantly, air at atmospheric pressure was also observed to be appropriate for the oxidation, although longer reaction times were required. After the optimization of the reaction conditions, the study was extended to other alcohol substrates and good catalytic activity was found for benzylic-type alcohols, while low yield was found for 1-octanol.
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Affiliation(s)
- Miguel Ángel Gaona
- Departamento de Química Inorgánica, Facultad de Química, Universidad de Sevilla, Aptdo 1203, 41071 Sevilla, Spain.
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231
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Reddy CBR, Reddy SR, Naidu S. Chemoselective Oxidation of Benzyl, Amino, and Propargyl Alcohols to Aldehydes and Ketones under Mild Reaction Conditions. ChemistryOpen 2015; 4:107-10. [PMID: 25969806 PMCID: PMC4420580 DOI: 10.1002/open.201402082] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Indexed: 11/10/2022] Open
Abstract
Catalytic oxidation reactions often suffer from drawbacks such as low yields and poor selectivity. Particularly, selective oxidation of alcohols becomes more difficult when a compound contains more than one oxidizable functional group. In order to deliver a methodology that addresses these issues, herein we report an efficient, aerobic, chemoselective and simplified approach to oxidize a broad range of benzyl and propargyl alcohols containing diverse functional groups to their corresponding aldehydes and ketones in excellent yields under mild reaction conditions. Optimal yields were obtained at room temperature using 1 mmol substrate, 10 mol % copper(I) iodide, 10 mol % 4-dimethylaminopyridine (DMAP), and 1 mol % 2,2,6,6-tetramethylpiperidine 1-oxyl (TEMPO) in acetonitrile, under an oxygen balloon. The catalytic system can be applied even when sensitive and oxidizable groups such as alkynes, amines, and phenols are present; starting materials and products containing such groups were found to be stable under the developed conditions.
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Affiliation(s)
- C B Rajashekar Reddy
- Organic Chemistry Division, Department of Chemistry, VIT University Vellore, 632014, India
| | | | - Shivaji Naidu
- Organic Chemistry Division, Department of Chemistry, VIT University Vellore, 632014, India
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232
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Galletti P, Funiciello F, Soldati R, Giacomini D. Selective Oxidation of Amines to Aldehydes or Imines using Laccase-Mediated Bio-Oxidation. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500165] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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233
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Liu J, Wang W, Wang R, Gu L. Synthesis of Quaternary α-Hydroxy Phosphonates viaDirect Hydroxylation of Phosphonate Compounds. CHINESE J CHEM 2015. [DOI: 10.1002/cjoc.201400858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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234
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Xie X, Stahl SS. Efficient and selective Cu/nitroxyl-catalyzed methods for aerobic oxidative lactonization of diols. J Am Chem Soc 2015; 137:3767-70. [PMID: 25751494 DOI: 10.1021/jacs.5b01036] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Cu/nitroxyl catalysts have been identified that promote highly efficient and selective aerobic oxidative lactonization of diols under mild reaction conditions using ambient air as the oxidant. The chemo- and regioselectivity of the reaction may be tuned by changing the identity of the nitroxyl cocatalyst. A Cu/ABNO catalyst system (ABNO = 9-azabicyclo[3.3.1]nonan-N-oxyl) shows excellent reactivity with symmetrical diols and hindered unsymmetrical diols, whereas a Cu/TEMPO catalyst system (TEMPO = 2,2,6,6-tetramethyl-1-piperidinyl-N-oxyl) displays excellent chemo- and regioselectivity for the oxidation of less hindered unsymmetrical diols. These catalyst systems are compatible with all classes of alcohols (benzylic, allylic, aliphatic), mediate efficient lactonization of 1,4-, 1,5-, and some 1,6-diols, and tolerate diverse functional groups, including alkenes, heterocycles, and other heteroatom-containing groups.
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Affiliation(s)
- Xiaomin Xie
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
| | - Shannon S Stahl
- Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, Wisconsin 53706, United States
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235
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Zhang G, Lang R, Wang W, Lv H, Zhao L, Xia C, Li F. Light-Sensitive and Recoverable N-Heterocyclic Carbene Copper(I) Complex in Homogeneous Catalysis. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201401140] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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236
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Vanoye L, Pablos M, de Bellefon C, Favre-Réguillon A. Gas-Liquid Segmented Flow Microfluidics for Screening Copper/TEMPO-Catalyzed Aerobic Oxidation of Primary Alcohols. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201400925] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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237
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Feng X, Xu C, Wang ZQ, Tang SF, Fu WJ, Ji BM, Wang LY. Aerobic Oxidation of Alcohols and the Synthesis of Benzoxazoles Catalyzed by a Cuprocupric Coordination Polymer (Cu+-CP) Assisted by TEMPO. Inorg Chem 2015; 54:2088-90. [DOI: 10.1021/ic502884z] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Xun Feng
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
| | - Chen Xu
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
| | - Zhi-Qiang Wang
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
| | - Si-Fu Tang
- Qingdao
Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, China
| | - Wei-Jun Fu
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
| | - Bao-Ming Ji
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
| | - Li-Ya Wang
- College
of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471022, China
- College
of Chemistry and Pharmacy Engineering, Nanyang Normal University, Nanyang 473601, China
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238
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Li X, Jin C, Gu L. C-H hydroxylation of phosphonates with oxygen in [bmIm]OH To produce quaternary α-hydroxy phosphonates. J Org Chem 2015; 80:2443-7. [PMID: 25634114 DOI: 10.1021/jo502883q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A highly efficient and mild [bmIm]OH-catalyzed α-hydroxylation of phosphonates using O2 as the oxygen source is described. The employment of ionic liquid under mild reaction conditions makes this transformation green and practical. Especially, this reaction provided a novel and convenient methodology for the construction of quaternary α-hydroxy phosphonates.
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Affiliation(s)
- Xiangguang Li
- Chemical Science and Technology Department, Kunming University , Kunming 650214, China
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239
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240
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Sasano Y, Kogure N, Nishiyama T, Nagasawa S, Iwabuchi Y. Highly Efficient Aerobic Oxidation of Alcohols by Using Less-Hindered Nitroxyl-Radical/Copper Catalysis: Optimum Catalyst Combinations and Their Substrate Scope. Chem Asian J 2015; 10:1004-9. [DOI: 10.1002/asia.201403245] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2014] [Indexed: 11/08/2022]
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241
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242
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Sahu D, Silva AR, Das P. A novel iron(iii)-based heterogeneous catalyst for aqueous oxidation of alcohols using molecular oxygen. RSC Adv 2015. [DOI: 10.1039/c5ra16734e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The first example of an iron(iii)-based heterogeneous catalyst for alcohol oxidation reactions in water employing molecular oxygen has been reported. Interestingly, the immobilized catalyst shows superior activity over its homogeneous counterpart.
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Affiliation(s)
- Debojeet Sahu
- Department of Chemistry
- Dibrugarh University
- Dibrugarh
- India
| | - Ana Rosa Silva
- CICECO-Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
| | - Pankaj Das
- Department of Chemistry
- Dibrugarh University
- Dibrugarh
- India
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243
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Kelly CB, Ovian JM, Cywar RM, Gosselin TR, Wiles RJ, Leadbeater NE. Oxidative cleavage of allyl ethers by an oxoammonium salt. Org Biomol Chem 2015; 13:4255-9. [DOI: 10.1039/c5ob00270b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A method to oxidatively cleave allyl ethers to their corresponding aldehydes mediated by an oxoammonium salt is described. Using a biphasic solvent system and mild heating, cleavage proceeds readily, furnishing a variety of α,β-unsaturated aldehydes and ketones.
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Affiliation(s)
| | - John M. Ovian
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
| | - Robin M. Cywar
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
| | | | | | - Nicholas E. Leadbeater
- Department of Chemistry
- University of Connecticut
- Storrs
- USA
- Department of Community Medicine & Health Care
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244
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Kopylovich MN, Ribeiro AP, Alegria EC, Martins NM, Martins LM, Pombeiro AJ. Catalytic Oxidation of Alcohols. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2015. [DOI: 10.1016/bs.adomc.2015.02.004] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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245
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Gu L, Zhang H. Copper-catalyzed aerobic synthesis of bisaryl ketones from alkynes via the cleavage of C–C triple bonds. RSC Adv 2015. [DOI: 10.1039/c4ra06460g] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
A novel copper-catalyzed aerobic synthesis of bisaryl ketones from 1,2-diarylalkynes via the cleavage of C–C triple bonds is reported.
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Affiliation(s)
- Lijun Gu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education
- Yunnan Minzu University
- Kunming
- China
| | - Hongtao Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education
- Yunnan Minzu University
- Kunming
- China
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246
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Mahmudov KT, Sutradhar M, Martins LMDRS, Guedes da Silva MFC, Ribera A, Nunes AVM, Gahramanova SI, Marchetti F, Pombeiro AJL. MnII and CuII complexes with arylhydrazones of active methylene compounds as effective heterogeneous catalysts for solvent- and additive-free microwave-assisted peroxidative oxidation of alcohols. RSC Adv 2015. [DOI: 10.1039/c5ra02667a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Highly water-soluble MnII and CuII complexes are heterogeneous catalysts for solvent- and additive-free microwave-assisted peroxidative oxidation of less polar bulky substituted or long chain alcohols.
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Affiliation(s)
- Kamran T. Mahmudov
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049–001 Lisbon
- Portugal
| | - Manas Sutradhar
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049–001 Lisbon
- Portugal
| | | | | | - Alice Ribera
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049–001 Lisbon
- Portugal
| | - Ana V. M. Nunes
- Requimte/CQFB
- Departamento de Química
- Faculdade de Ciências e Tecnologia
- Universidade Nova de Lisboa
- Campus de Caparica
| | - Shahnaz I. Gahramanova
- Institute of Catalysis and Inorganic Chemistry named after acad. M.F. Nagiyev
- Az 1143 Baku
- Azerbaijan
| | | | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049–001 Lisbon
- Portugal
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247
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Dornan LM, Muldoon MJ. A highly efficient palladium(ii)/polyoxometalate catalyst system for aerobic oxidation of alcohols. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01632g] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple catalyst system composed of Pd(OAc)2, phosphomolybdic acid and tetrabutylammonium acetate oxidises a range of alcohols efficiently, with turnover numbers (TONs) of up to 10 000.
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Affiliation(s)
- Laura M. Dornan
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
| | - Mark J. Muldoon
- School of Chemistry and Chemical Engineering
- Queen's University Belfast
- Belfast
- UK
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248
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Gu L, Jin C, Zhang H. The catalytic aerobic synthesis of quaternary α-hydroxy phosphonates via direct hydroxylation of phosphonate compounds. NEW J CHEM 2015. [DOI: 10.1039/c4nj02072c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly efficient Cu-catalyzed direct hydroxylation of phosphonate compounds has been developed. This transformation provides a powerful method for the synthesis of quaternary α-hydroxy phosphonates in good yields.
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Affiliation(s)
- Lijun Gu
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education
- Yunnan Minzu University
- Kunming
- China
| | - Cheng Jin
- New United Group Company Limited
- Changzhou
- China
| | - Hongtao Zhang
- Key Laboratory of Chemistry in Ethnic Medicinal Resources
- State Ethnic Affairs Commission & Ministry of Education
- Yunnan Minzu University
- Kunming
- China
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249
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Dighe SU, Chowdhury D, Batra S. Iron Nitrate/TEMPO: a Superior Homogeneous Catalyst for Oxidation of Primary Alcohols to Nitriles in Air. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400718] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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250
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Zhang G, Yang C, Liu E, Li L, Golen JA, Rheingold AL. Mild, green copper/4-dimethylaminopyridine catalysed aerobic oxidation of alcohols mediated by nitroxyl radicals in water. RSC Adv 2014. [DOI: 10.1039/c4ra13929a] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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