51
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Hou F, Wang XC, Quan ZJ. Efficient synthesis of esters through oxone-catalyzed dehydrogenation of carboxylic acids and alcohols. Org Biomol Chem 2018; 16:9472-9476. [DOI: 10.1039/c8ob02539h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
An environmentally friendly oxone (20 mol%) catalyzed esterification of carboxylic acids with alcohols has been developed, providing an attractive alternative to the construction of valuable carbonyl esters.
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Affiliation(s)
- Fei Hou
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials
| | - Xi-Cun Wang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials
| | - Zheng-Jun Quan
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou
- People's Republic of China
- Gansu International Scientific and Technological Cooperation Base of Water-Retention Chemical Functional Materials
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52
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Hu Y, Li B. Efficient and selective palladium-catalyzed direct oxidative esterification of benzylic alcohols under aerobic conditions. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.11.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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53
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Ghalehshahi HG, Madsen R. Silver-Catalyzed Dehydrogenative Synthesis of Carboxylic Acids from Primary Alcohols. Chemistry 2017; 23:11920-11926. [DOI: 10.1002/chem.201702420] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Hajar Golshadi Ghalehshahi
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
- Current address: Department of Chemistry; K. N. Toosi University of Technology, P. O. Box 15875; 4416 Tehran Iran
| | - Robert Madsen
- Department of Chemistry; Technical University of Denmark; 2800 Kgs. Lyngby Denmark
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54
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Chun S, Chung YK. Transition-Metal-Free Poly(thiazolium) Iodide/1,8-Diazabicyclo[5.4.0]undec-7-ene/Phenazine-Catalyzed Esterification of Aldehydes with Alcohols. Org Lett 2017; 19:3787-3790. [DOI: 10.1021/acs.orglett.7b01617] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Affiliation(s)
- Supill Chun
- Department of Chemistry,
College of Natural Sciences, Seoul National University, Seoul 08826, Korea
| | - Young Keun Chung
- Department of Chemistry,
College of Natural Sciences, Seoul National University, Seoul 08826, Korea
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55
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Alanthadka A, Devi ES, Selvi AT, Nagarajan S, Sridharan V, Maheswari CU. N-Heterocyclic Carbene-Catalyzed Mannich Reaction for the Synthesis of β-Amino Ketones: N
,N
-Dimethylformamide as Carbon Source. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700125] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anitha Alanthadka
- Organic Synthesis Group, Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; Thanjavur 613401 India
| | - E. Sankari Devi
- Organic Synthesis Group, Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; Thanjavur 613401 India
| | - A. Tamil Selvi
- Department of Chemistry; Thiagarajar College; Madurai 625009 India
| | - Subbiah Nagarajan
- Organic Synthesis Group, Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; Thanjavur 613401 India
| | - Vellaisamy Sridharan
- Organic Synthesis Group, Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; Thanjavur 613401 India
| | - C. Uma Maheswari
- Organic Synthesis Group, Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; Thanjavur 613401 India
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56
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Wang G, Fu Z, Huang W. Access to Amide from Aldimine via Aerobic Oxidative Carbene Catalysis and LiCl as Cooperative Lewis Acid. Org Lett 2017; 19:3362-3365. [PMID: 28654279 DOI: 10.1021/acs.orglett.7b01195] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, an efficient route to amides from aldimines via aza-Breslow intermediates through aerobic oxidative carbene catalysis with LiCl as a cooperative Lewis acid is described. Many of the obtained N-heteroarylamides feature biological activity. Ambient air was used as the sole oxidant and source of oxygen in this catalytically oxidative amidation. This method allows for a broad substrate scope and mild conditions. The aza-Breslow intermediate derivative was isolated and its crystal structure confirmed.
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Affiliation(s)
- Guanjie Wang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China
| | - Zhenqian Fu
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China
| | - Wei Huang
- Key Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University , 30 South Puzhu Road, Nanjing 211816, China.,Key Laboratory for Organic Electronics and Information Displays, Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China
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57
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Yedage SL, Bhanage BM. tert-Butyl Nitrite-Mediated Synthesis of N-Nitrosoamides, Carboxylic Acids, Benzocoumarins, and Isocoumarins from Amides. J Org Chem 2017; 82:5769-5781. [PMID: 28472882 DOI: 10.1021/acs.joc.7b00570] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
This work reports tert-butyl nitrite (TBN) as a multitask reagent for (1) the controlled synthesis of N-nitrosoamide from N-alkyl amides, (2) hydrolysis of N-methoxyamides to carboxylic acids, (3) metal- and oxidant-free benzocoumarin synthesis from ortho-aryl-N-methoxyamides via N-H, C-N, and C-H bond activation, and (4) isocoumarin synthesis using Ru(II)/PEG as a recyclable catalytic system via ortho-C-H activation and TBN as an oxygen source. The sequential functional group interconversion of amide to acid has also been examined using IR spectroscopic analysis. Additionally, this methodology is highly advantageous due to short reaction time, gram scale synthesis, and broad substrate scope.
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Affiliation(s)
- Subhash L Yedage
- Department of Chemistry, Institute of Chemical Technology , Mumbai 400019, India
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58
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Mahmood S, Li T, Xu BH, Guo YF, Zhang SJ. Cobalt(II)/TFA-Catalyzed Oxidative Esterification of Aldehydes and Alcohols: Dual Role of the Acid Co-Catalyst. ASIAN J ORG CHEM 2017. [DOI: 10.1002/ajoc.201700139] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Sajid Mahmood
- Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process; State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P. R. China
- School of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Ting Li
- Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process; State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P. R. China
- School of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Bao-Hua Xu
- Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process; State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P. R. China
| | - Ya-Fei Guo
- Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process; State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P. R. China
- School of Chemistry and Chemical Engineering; University of Chinese Academy of Sciences; Beijing 100049 P. R. China
| | - Suo-Jiang Zhang
- Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process; State Key Laboratory of Multiphase Complex Systems; Institute of Process Engineering; Chinese Academy of Sciences; Beijing 100190 P. R. China
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59
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Youn SW, Yoo HJ. One-Pot Sequential N-Heterocyclic Carbene/Rhodium(III) Catalysis: Synthesis of Fused Polycyclic Isocoumarins. Adv Synth Catal 2017. [DOI: 10.1002/adsc.201700072] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- So Won Youn
- Center for New Directions in Organic Synthesis, Department of Chemistry and Institute for Material Design; Hanyang University; Seoul 04763 Korea
| | - Huen Ji Yoo
- Center for New Directions in Organic Synthesis, Department of Chemistry and Institute for Material Design; Hanyang University; Seoul 04763 Korea
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60
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Wu X, Zhang Y, Wang Y, Ke J, Jeret M, Reddi RN, Yang S, Song BA, Chi YR. Polyhalides as Efficient and Mild Oxidants for Oxidative Carbene Organocatalysis by Radical Processes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611692] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Xingxing Wu
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yuexia Zhang
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yuhuang Wang
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jie Ke
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Martin Jeret
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Rambabu N. Reddi
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Song Yang
- 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
| | - Bao-An Song
- 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
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
- 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
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61
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Wu X, Zhang Y, Wang Y, Ke J, Jeret M, Reddi RN, Yang S, Song BA, Chi YR. Polyhalides as Efficient and Mild Oxidants for Oxidative Carbene Organocatalysis by Radical Processes. Angew Chem Int Ed Engl 2017; 56:2942-2946. [DOI: 10.1002/anie.201611692] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Xingxing Wu
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yuexia Zhang
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Yuhuang Wang
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Jie Ke
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Martin Jeret
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Rambabu N. Reddi
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
| | - Song Yang
- 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
| | - Bao-An Song
- 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
- Division of Chemistry & Biological Chemistry; School of Physical & Mathematical Sciences; Nanyang Technological University; Singapore 637371 Singapore
- 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
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62
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Khosravi K, Khalaji K, Naserifar S. Solvent- and Metal-free Oxidative Esterification of Aromatic Aldehydes Using Urea-2,2-dihydroperoxypropane as a New Solid Oxidant. J CHIN CHEM SOC-TAIP 2017. [DOI: 10.1002/jccs.201600777] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Kaveh Khosravi
- Faculty of Science, Department of Chemistry; Arak University; Arak 38156-8-8349 Iran
| | - Kobra Khalaji
- Faculty of Science, Department of Chemistry; Arak University; Arak 38156-8-8349 Iran
| | - Shirin Naserifar
- Faculty of Science, Department of Chemistry; Arak University; Arak 38156-8-8349 Iran
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63
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Bortolini O, Chiappe C, Fogagnolo M, Massi A, Pomelli CS. Formation, Oxidation, and Fate of the Breslow Intermediate in the N-Heterocyclic Carbene-Catalyzed Aerobic Oxidation of Aldehydes. J Org Chem 2016; 82:302-312. [PMID: 27966944 DOI: 10.1021/acs.joc.6b02414] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The reaction paths and intermediate structures related to the formation of the Breslow intermediate and its oxidation along the oxidative/oxygenative lanes have been studied from a mechanistic point of view, with the support of gas-phase and computational studies. The results confirm the occurrence of a single-electron transfer from the Breslow intermediate to the molecular oxygen with formation of a radical couple that recombines either as a peroxide anion 7' to afford the aldehyde-to-carboxylic acid product or as a hydroperoxy derivative 7″ that evolved into an electrophilic acyl azolium, opening to the aldehyde-to-ester conversion. Steric factors enter into determining the different reactivity. All of the intermediates of both catalytic paths have been observed and characterized under mass spectrometric conditions. In particular, for the imidazoline catalyst, the (+)ESI-MS/(MS) detection of the genuine Breslow intermediate was made possible in virtue of its limited reactivity. Mechanistic aspects of the N-heterocyclic carbenes catalyzed aerobic oxidation of aldehydes shares important similarities with that one of the recently revisited benzoin condensation.
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Affiliation(s)
- Olga Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara , Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - Cinzia Chiappe
- Dipartimento di Farmacia, Università di Pisa , Via Bonanno 33, 56126 Pisa, Italy
| | - Marco Fogagnolo
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara , Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
| | - Alessandro Massi
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara , Via Fossato di Mortara 17-19, 44121 Ferrara, Italy
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64
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Yang W, Hu W, Dong X, Li X, Sun J. N-Heterocyclic Carbene Catalyzed γ-Dihalomethylenation of Enals by Single-Electron Transfer. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201608371] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Wen Yang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering; Hunan University; Changsha Hunan 410082 China
| | - Weimin Hu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Xiuqin Dong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Xin Li
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Jianwei Sun
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
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65
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Yang W, Hu W, Dong X, Li X, Sun J. N-Heterocyclic Carbene Catalyzed γ-Dihalomethylenation of Enals by Single-Electron Transfer. Angew Chem Int Ed Engl 2016; 55:15783-15786. [DOI: 10.1002/anie.201608371] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 10/23/2016] [Indexed: 01/04/2023]
Affiliation(s)
- Wen Yang
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering; Hunan University; Changsha Hunan 410082 China
| | - Weimin Hu
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Xiuqin Dong
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Xin Li
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
| | - Jianwei Sun
- Department of Chemistry; The Hong Kong University of Science and Technology; Clear Water Bay, Kowloon Hong Kong SAR China
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66
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Wang MH, Scheidt KA. Cooperative Catalysis and Activation with N-Heterocyclic Carbenes. Angew Chem Int Ed Engl 2016; 55:14912-14922. [DOI: 10.1002/anie.201605319] [Citation(s) in RCA: 359] [Impact Index Per Article: 44.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Indexed: 01/29/2023]
Affiliation(s)
- Michael H. Wang
- Department of Chemistry; Center for Molecular Innovation and Drug Discovery; Chemistry of Life Processes Institute, Silverman Hall; Northwestern University; Evanston IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry; Center for Molecular Innovation and Drug Discovery; Chemistry of Life Processes Institute, Silverman Hall; Northwestern University; Evanston IL 60208 (USA)
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67
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Affiliation(s)
- Michael H. Wang
- Department of Chemistry; Center for Molecular Innovation and Drug Discovery; Chemistry of Life Processes Institute, Silverman Hall; Northwestern University; Evanston IL 60208 (USA)
| | - Karl A. Scheidt
- Department of Chemistry; Center for Molecular Innovation and Drug Discovery; Chemistry of Life Processes Institute, Silverman Hall; Northwestern University; Evanston IL 60208 (USA)
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68
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Alanthadka A, Devi ES, Nagarajan S, Sridharan V, Suvitha A, Maheswari CU. NHC-Catalyzed Benzylic Csp³-H Bond Activation of Alkylarenes andN-Benzylamines for the Synthesis of 3H-Quinazolin-4-ones: Experimental and Theoretical Study. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600792] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anitha Alanthadka
- Organic Synthesis Group; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
| | - E. Sankari Devi
- Organic Synthesis Group; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
| | - Subbiah Nagarajan
- Organic Synthesis Group; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
| | - Vellaisamy Sridharan
- Organic Synthesis Group; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
| | - Ambigapathy Suvitha
- Computational Molecular Biophysics Laboratory; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
| | - C. Uma Maheswari
- Organic Synthesis Group; Department of Chemistry; School of Chemical and Biotechnology; SASTRA University; 613401 Thanjavur India
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69
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Santilli C, Makarov IS, Fristrup P, Madsen R. Dehydrogenative Synthesis of Carboxylic Acids from Primary Alcohols and Hydroxide Catalyzed by a Ruthenium N-Heterocyclic Carbene Complex. J Org Chem 2016; 81:9931-9938. [DOI: 10.1021/acs.joc.6b02105] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Carola Santilli
- Department
of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Ilya S. Makarov
- Department
of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Peter Fristrup
- Department
of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark
| | - Robert Madsen
- Department
of Chemistry, Technical University of Denmark, DK-2800 Lyngby, Denmark
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70
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Gaspa S, Porcheddu A, De Luca L. Recent developments in oxidative esterification and amidation of aldehydes. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.06.115] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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71
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Lv Z, Zheng W, Chen Z, Tang Z, Mo W, Yin G. Synergistic oxygen atom transfer by ruthenium complexes with non-redox metal ions. Dalton Trans 2016; 45:11369-83. [PMID: 27333442 DOI: 10.1039/c6dt01077f] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Non-redox metal ions can affect the reactivity of active redox metal ions in versatile biological and heterogeneous oxidation processes; however, the intrinsic roles of these non-redox ions still remain elusive. This work demonstrates the first example of the use of non-redox metal ions as Lewis acids to sharply improve the catalytic oxygen atom transfer efficiency of a ruthenium complex bearing the classic 2,2'-bipyridine ligand. In the absence of Lewis acid, the oxidation of ruthenium(ii) complex by PhI(OAc)2 generates the Ru(iv)[double bond, length as m-dash]O species, which is very sluggish for olefin epoxidation. When Ru(bpy)2Cl2 was tested as a catalyst alone, only 21.2% of cyclooctene was converted, and the yield of 1,2-epoxycyclooctane was only 6.7%. As evidenced by electronic absorption spectra and EPR studies, both the oxidation of Ru(ii) by PhI(OAc)2 and the reduction of Ru(iv)[double bond, length as m-dash]O by olefin are kinetically slow. However, adding non-redox metal ions such as Al(iii) can sharply improve the oxygen transfer efficiency of the catalyst to 100% conversion with 89.9% yield of epoxide under identical conditions. Through various spectroscopic characterizations, an adduct of Ru(iv)[double bond, length as m-dash]O with Al(iii), Ru(iv)[double bond, length as m-dash]O/Al(iii), was proposed to serve as the active species for epoxidation, which in turn generated a Ru(iii)-O-Ru(iii) dimer as the reduced form. In particular, both the oxygen transfer from Ru(iv)[double bond, length as m-dash]O/Al(iii) to olefin and the oxidation of Ru(iii)-O-Ru(iii) back to the active Ru(iv)[double bond, length as m-dash]O/Al(iii) species in the catalytic cycle can be remarkably accelerated by adding a non-redox metal, such as Al(iii). These results have important implications for the role played by non-redox metal ions in catalytic oxidation at redox metal centers as well as for the understanding of the redox mechanism of ruthenium catalysts in the oxygen atom transfer reaction.
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Affiliation(s)
- Zhanao Lv
- Key laboratory of Material Chemistry for Energy Conversion and Storage (Huazhong University of Science and Technology), Ministry of Education, Key laboratory of Material Chemistry and Service Failure, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, PR China.
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72
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Iqbal N, Cho EJ. Visible-Light-Mediated Synthesis of Amides from Aldehydes and Amines via in Situ Acid Chloride Formation. J Org Chem 2016; 81:1905-11. [PMID: 26836367 DOI: 10.1021/acs.joc.5b02726] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
An efficient visible-light photocatalysis-based one-pot amide synthesis method was developed; visible-light irradiation of a mixture of an aldehyde, tert-butyl hydrogen peroxide, and N-chlorosuccinimide using a Ru(bpy)3Cl2 photocatalyst afforded an acid chloride, which subsequently reacted with amine to yield the corresponding amide. The reaction was used to synthesize moclobemide and a D3 receptor intermediate.
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Affiliation(s)
- Naeem Iqbal
- Department of Chemistry and Applied Chemistry, Hanyang University , Ansan 426-791, Republic of Korea
| | - Eun Jin Cho
- Department of Chemistry, Chung-Ang University , Seoul 156-756, Republic of Korea
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73
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Nisa RU, Mahmood T, Ludwig R, Ayub K. Theoretical mechanistic investigation of zinc(ii) catalyzed oxidation of alcohols to aldehydes and esters. RSC Adv 2016. [DOI: 10.1039/c5ra23096a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Theoretical mechanistic (DFT) study of the Zn(ii) catalyzed oxidation of benzylic alcohol to aldehyde and esters with H2O2 oxidant is supportive to intermediate sphere mechanism over inner sphere mechanism.
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Affiliation(s)
- Riffat Un Nisa
- Department of Chemistry
- COMSATS Institute for Information Technology
- Campus Abbottabad
- Abbottabad
- Pakistan
| | - Tariq Mahmood
- Department of Chemistry
- COMSATS Institute for Information Technology
- Campus Abbottabad
- Abbottabad
- Pakistan
| | - Ralf Ludwig
- Leibniz-Institut für Katalyse e. V. an der Universität Rostock
- 18059 Rostock
- Germany
- Department of Physical Chemistry
- University of Rostock
| | - Khurshid Ayub
- Department of Chemistry
- COMSATS Institute for Information Technology
- Campus Abbottabad
- Abbottabad
- Pakistan
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74
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Ragno D, Zaghi A, Di Carmine G, Giovannini PP, Bortolini O, Fogagnolo M, Molinari A, Venturini A, Massi A. Cross-benzoin and Stetter-type reactions mediated by KOtBu-DMF via an electron-transfer process. Org Biomol Chem 2016; 14:9823-9835. [DOI: 10.1039/c6ob01868h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The KOtBu-DMF system promotes benzoin- and Stetter-like reactions of alpha-diketone donors through a double electron-transfer-based mechanism.
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Affiliation(s)
- Daniele Ragno
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Anna Zaghi
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Graziano Di Carmine
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Pier Paolo Giovannini
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Olga Bortolini
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Marco Fogagnolo
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | - Alessandra Molinari
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
| | | | - Alessandro Massi
- Department of Chemistry and Pharmaceutical Sciences - University of Ferrara
- I-44121 Ferrara
- Italy
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75
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Maruani A, Lee MTW, Watkins G, Akhbar AR, Baggs H, Shamsabadi A, Richards DA, Chudasama V. A facile, one-pot procedure for the conversion of aromatic aldehydes to esters, as well as thioesters and amides, via acyl hydrazide intermediates. RSC Adv 2016. [DOI: 10.1039/c5ra26842g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A facile, one-pot procedure for the conversion of aromatic aldehydes to esters, as well as thioesters and amides, via acyl hydrazide intermediates.
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Affiliation(s)
| | | | - George Watkins
- Department of Chemistry
- University College London
- London
- UK
| | | | - Henry Baggs
- Department of Chemistry
- University College London
- London
- UK
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76
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Coe BJ, Peers MK, Scrutton NS. Syntheses and electronic and optical properties of complexes of the bis(2,2′-bipyrazyl)ruthenium unit. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.04.028] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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77
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Kim YJ, Cheon CH. Metal-Free Aerobic Oxidative Esterification of Aldehydes in the Presence of Cyanide. B KOREAN CHEM SOC 2015. [DOI: 10.1002/bkcs.10398] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Yoo-Jin Kim
- Department of Chemistry; Korea University; Seoul 136701 Republic of Korea
| | - Cheol-Hong Cheon
- Department of Chemistry; Korea University; Seoul 136701 Republic of Korea
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78
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Gaspa S, Porcheddu A, De Luca L. Metal-Free Direct Oxidation of Aldehydes to Esters Using TCCA. Org Lett 2015; 17:3666-9. [DOI: 10.1021/acs.orglett.5b01579] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Silvia Gaspa
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
| | - Andrea Porcheddu
- Dipartimento
di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, Cittadella Universitaria, 09042 Monserrato, Italy
| | - Lidia De Luca
- Dipartimento
di Chimica e Farmacia, Università degli Studi di Sassari, Via Vienna 2, 07100 Sassari, Italy
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79
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Hollister KA, Conner ES, Spell ML, Deveaux K, Maneval L, Beal MW, Ragains JR. Remote Hydroxylation through Radical Translocation and Polar Crossover. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201500880] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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80
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Hollister KA, Conner ES, Spell ML, Deveaux K, Maneval L, Beal MW, Ragains JR. Remote Hydroxylation through Radical Translocation and Polar Crossover. Angew Chem Int Ed Engl 2015; 54:7837-41. [PMID: 26014758 DOI: 10.1002/anie.201500880] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2015] [Revised: 04/08/2015] [Indexed: 11/11/2022]
Abstract
Mild conditions are reported for the hydroxylation of aliphatic C-H bonds through radical translocation, oxidation to carbocation, and nucleophilic trapping with H2O. This remote functionalization employs fac-[Ir(ppy)3] together with Tz(o) sulfonate esters and sulfonamides to facilitate the site-selective replacement of relatively inert C-H bonds with the more synthetically useful C-OH group. The hydroxylation of a range of substrates and the methoxylation of two substrates through 1,6- and 1,7-hydrogen-atom transfer are demonstrated. In addition, a synthesis of the antidepressant fluoxetine using remote hydroxylation as a key step is presented.
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Affiliation(s)
- Kyle A Hollister
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Elizabeth S Conner
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Mark L Spell
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Kristina Deveaux
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Léa Maneval
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Michael W Beal
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA)
| | - Justin R Ragains
- Department of Chemistry, Louisiana State University, 232 Choppin Hall, Baton Rouge, LA 70803 (USA).
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81
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Guggilapu SD, Prajapti SK, Babu BN. An efficient one-pot oxidative esterification of aldehydes to carboxylic esters using B(C6F5)3–TBHP. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.01.033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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82
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Krylov IB, Vil’ VA, Terent’ev AO. Cross-dehydrogenative coupling for the intermolecular C-O bond formation. Beilstein J Org Chem 2015; 11:92-146. [PMID: 25670997 PMCID: PMC4311763 DOI: 10.3762/bjoc.11.13] [Citation(s) in RCA: 134] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2014] [Accepted: 12/31/2014] [Indexed: 12/11/2022] Open
Abstract
The present review summarizes primary publications on the cross-dehydrogenative C-O coupling, with special emphasis on the studies published after 2000. The starting compound, which donates a carbon atom for the formation of a new C-O bond, is called the CH-reagent or the C-reagent, and the compound, an oxygen atom of which is involved in the new bond, is called the OH-reagent or the O-reagent. Alcohols and carboxylic acids are most commonly used as O-reagents; hydroxylamine derivatives, hydroperoxides, and sulfonic acids are employed less often. The cross-dehydrogenative C-O coupling reactions are carried out using different C-reagents, such as compounds containing directing functional groups (amide, heteroaromatic, oxime, and so on) and compounds with activated C-H bonds (aldehydes, alcohols, ketones, ethers, amines, amides, compounds containing the benzyl, allyl, or propargyl moiety). An analysis of the published data showed that the principles at the basis of a particular cross-dehydrogenative C-O coupling reaction are dictated mainly by the nature of the C-reagent. Hence, in the present review the data are classified according to the structures of C-reagents, and, in the second place, according to the type of oxidative systems. Besides the typical cross-dehydrogenative coupling reactions of CH- and OH-reagents, closely related C-H activation processes involving intermolecular C-O bond formation are discussed: acyloxylation reactions with ArI(O2CR)2 reagents and generation of O-reagents in situ from C-reagents (methylarenes, aldehydes, etc.).
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Affiliation(s)
- Igor B Krylov
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Vera A Vil’
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
| | - Alexander O Terent’ev
- N. D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Leninsky Prospect 47, Moscow, 119991, Russia
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83
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Kreye O, Over LC, Nitsche T, Lange RZ, Meier MA. Organic carbonates: sustainable and environmentally-friendly ethylation, allylation, and benzylation reagents. Tetrahedron 2015. [DOI: 10.1016/j.tet.2014.11.053] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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84
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Lin L, Yang Y, Wang M, Lai L, Guo Y, Wang R. Oxidative N-heterocyclic carbene catalyzed stereoselective annulation of simple aldehydes and 5-alkenyl thiazolones. Chem Commun (Camb) 2015; 51:8134-7. [DOI: 10.1039/c5cc01587a] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A highly stereoselective annulation proceeded successfully to afford chiral thiazolo pyrones with excellent ee (up to 99%) and d.r. (up to >20 : 1). Both enantiomers can be obtained. In the presence of oxygen (O2), the oxidant O-1 can be used in a catalytic amount (even low to 2 mol%).
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Affiliation(s)
- Li Lin
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
| | - Yuhong Yang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
| | - Mei Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
| | - Luhao Lai
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
| | - Yarong Guo
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
| | - Rui Wang
- Key Laboratory of Preclinical Study for New Drugs of Gansu Province
- School of Basic Medical Sciences
- Lanzhou University
- Lanzhou 730000
- China
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85
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Kashyap R, Talukdar DJ, Pratihar S. Iron oxalate capped iron–copper nanomaterial for oxidative transformation of aldehydes. NEW J CHEM 2015. [DOI: 10.1039/c4nj01966k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient, sustainable and green procedure for the synthesis of selective orthorhombic iron(oxalate) capped Fe–Cu bimetallic oxide nanomaterial [Fe(ox)Fe–CuOx] was developed using a sodium borohydride reduction of iron(ii) salt in the presence of oxalic acid at room temperature followed by addition of copper sulfate in water.
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86
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Samanta S, Pappula V, Dinda M, Adimurthy S. Transition metal-free oxidative esterification of benzylic alcohols in aqueous medium. Org Biomol Chem 2014; 12:9453-6. [PMID: 25325738 DOI: 10.1039/c4ob01524j] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Oxidative esterification of benzylic alcohols with a catalytic amount of HBr-H2O2 in aqueous medium under mild conditions is reported with a wide range of substrate scope for both benzylic and aliphatic alcohols. The conditions are also suitable for selective mono-esterification of ethylene glycol and glycerol. With catalytic amounts of HBr (20 mol%) and H2O2, the generation of reactive intermediate species BrOH has been ascertained by UV-visible spectra.
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Affiliation(s)
- Supravat Samanta
- Academy of Scientific & Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar-364 002, India.
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87
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Mitchell LJ, Moody CJ. Solar Photochemical Oxidation of Alcohols using Catalytic Hydroquinone and Copper Nanoparticles under Oxygen: Oxidative Cleavage of Lignin Models. J Org Chem 2014; 79:11091-100. [DOI: 10.1021/jo5020917] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Lorna J. Mitchell
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Christopher J. Moody
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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88
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Kondo T, Kimura YU, Yamada H, Toshimitsu A. Ruthenium-Based Catalysts for Aerobic Oxidation of Alcohols. TRANSITION METAL CATALYSIS IN AEROBIC ALCOHOL OXIDATION 2014. [DOI: 10.1039/9781782621652-00070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Oxidation reactions continue to play an important role in organic chemistry, and the increasing demand for greener oxidation methods in modern organic synthesis has led to rich developments in the field during recent decades. In order to minimize waste, catalytic methods are one of the most promising solutions, and allow the use of molecular O2 and air as readily available, terminal and ideal oxidants. Ruthenium's versatility is due to the wide range of accessible oxidation states, from −2 to +8, and the different types of oxidation mechanisms that are operative, depending on the ruthenium sources used. In this chapter, the focus is on green oxidation techniques using promising or potentially promising both homogeneous and heterogeneous ruthenium-based catalysts for the aerobic oxidation of alcohols to the corresponding aldehydes and ketones.
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Affiliation(s)
- Teruyuki Kondo
- Advanced Biomedical Engineering Research Unit, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - YU Kimura
- Research and Educational Unit of Leaders for Integrated Medical System, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Hisatsugu Yamada
- Advanced Biomedical Engineering Research Unit, Center for the Promotion of Interdisciplinary Education and Research, Kyoto University Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Akio Toshimitsu
- Division of Multidisciplinary Chemistry, Institute for Chemical Research, Kyoto University Gokanosho, Uji Kyoto 611-0011 Japan
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89
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Du Y, Wang Y, Li X, Shao Y, Li G, Webster RD, Chi YR. N-Heterocyclic Carbene Organocatalytic Reductive β,β-Coupling Reactions of Nitroalkenes via Radical Intermediates. Org Lett 2014; 16:5678-81. [DOI: 10.1021/ol5027415] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yu Du
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yuhuang Wang
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Xin Li
- State
key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Rd, Dalian 116023, P. R. China
| | - Yaling Shao
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Guohui Li
- State
key Laboratory of Molecular Reaction Dynamics, Dalian Institute of
Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Rd, Dalian 116023, P. R. China
| | - Richard D. Webster
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
| | - Yonggui Robin Chi
- Division of Chemistry & Biological Chemistry, School of Physical & Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore
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90
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Bortolini O, Chiappe C, Fogagnolo M, Giovannini PP, Massi A, Pomelli CS, Ragno D. An insight into the mechanism of the aerobic oxidation of aldehydes catalyzed by N-heterocyclic carbenes. Chem Commun (Camb) 2014; 50:2008-11. [PMID: 24413829 DOI: 10.1039/c3cc48929a] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
N-Heterocyclic carbene catalysis for the aerobic oxidation and esterification of aromatic aldehydes was monitored by ESI-MS (MS/MS) and the key intermediates were intercepted and characterized using the charge-tag strategy.
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Affiliation(s)
- O Bortolini
- Dipartimento di Scienze Chimiche e Farmaceutiche, Università di Ferrara, Via Fossato di Mortara 17, 44121 Ferrara, Italy.
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91
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Zhao Y, Wang ZT, Cheng Y. N-Heterocyclic Carbene/Brønsted Base Cascade Catalysis: Base-Controlled Selective Synthesis of Multifunctional Benzofuran-3-ones or Flavone Derivatives from the Reaction of 3-(2-Formylphenoxy)propenoates with Imines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201400331] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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92
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Liu K, Hovey MT, Scheidt KA. A Cooperative N-Heterocyclic Carbene/Palladium Catalysis System. Chem Sci 2014; 5:4026-4031. [PMID: 25364496 DOI: 10.1039/c4sc01536c] [Citation(s) in RCA: 90] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
N-heterocyclic carbenes (NHC) have been extensively studied as organocatalysts and ligands for transition metals, but the successful integration of NHCs and late transition metals in cooperative catalysis remains an underexplored area. We have developed a cooperative palladium-catalyzed allylation of NHC-activated aldehydes to access a variety of 3-allyl dihydrocoumarin derivatives. Kinetic experiments support a cooperative pathway for this transformation.
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Affiliation(s)
- Kun Liu
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - M Todd Hovey
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - Karl A Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Chemistry of Life Processes Institute, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
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93
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Organocatalysis: Key Trends in Green Synthetic Chemistry, Challenges, Scope towards Heterogenization, and Importance from Research and Industrial Point of View. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/402860] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
This paper purports to review catalysis, particularly the organocatalysis and its origin, key trends, challenges, examples, scope, and importance. The definition of organocatalyst corresponds to a low molecular weight organic molecule which in stoichiometric amounts catalyzes a chemical reaction. In this review, the use of the term heterogenized organocatalyst will be exclusively confined to a catalytic system containing an organic molecule immobilized onto some sort of support material and is responsible for accelerating a chemical reaction. Firstly, a brief description of the field is provided putting it in a green and sustainable perspective of chemistry. Next, research findings on the use of organocatalysts on various inorganic supports including nano(porous)materials, nanoparticles, silica, and zeolite/zeolitic materials are scrutinized in brief. Then future scope, research directions, and academic and industrial applications will be outlined. A succinct account will summarize some of the research and developments in the field. This review tries to bring many outstanding researches together and shows the vitality of the organocatalysis through several aspects.
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94
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Hopkinson MN, Sahoo B, Li JL, Glorius F. Dual Catalysis Sees the Light: Combining Photoredox with Organo-, Acid, and Transition-Metal Catalysis. Chemistry 2014; 20:3874-86. [DOI: 10.1002/chem.201304823] [Citation(s) in RCA: 579] [Impact Index Per Article: 57.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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95
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Feng JB, Gong JL, Li Q, Wu XF. Calcium and magnesium chlorides-catalyzed oxidative esterification of aromatic aldehydes. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.01.111] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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96
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Youn SW, Song HS, Park JH. Asymmetric Domino Multicatalysis for the Synthesis of 3-Substituted Phthalides: Cinchonine/NHC Cooperative System. Org Lett 2014; 16:1028-31. [DOI: 10.1021/ol5000617] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- So Won Youn
- Department of Chemistry and
Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Korea
| | - Hyoung Sub Song
- Department of Chemistry and
Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Korea
| | - Jong Hyub Park
- Department of Chemistry and
Research Institute for Natural Sciences, Hanyang University, Seoul 133-791, Korea
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97
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Ji M, Lim S, Jang HY. N-heterocyclic carbene-catalyzed oxidation of aldehydes for the synthesis of amides via phenolic esters. RSC Adv 2014. [DOI: 10.1039/c4ra04012k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Carbene-catalyzed TEMPO-mediated oxidative coupling conditions were used to convert the aldehydes to amides via phenolic ester intermediates.
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Affiliation(s)
- Miran Ji
- Division of Energy Systems Research
- Ajou University
- Suwon 443-749, Korea
| | - Seungyeon Lim
- Division of Energy Systems Research
- Ajou University
- Suwon 443-749, Korea
| | - Hye-Young Jang
- Division of Energy Systems Research
- Ajou University
- Suwon 443-749, Korea
- Korea Carbon Capture & Sequestration R&D Center
- Deajeon 305-343, Korea
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98
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Youn SW, Song HS, Park JH. NHC-catalyzed oxidative cyclization reaction for the synthesis of 3-substituted phthalides. Org Biomol Chem 2014; 12:2388-93. [DOI: 10.1039/c3ob42546k] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient NHC-catalyzed domino oxidation/oxa-Michael addition reaction of 2-alkenylbenzaldehydes has been developed to afford 3-substituted phthalides bearing a C3-stereogenic center with a broad substrate scope and wide functional group tolerance.
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Affiliation(s)
- So Won Youn
- Department of Chemistry and Research Institute for Natural Sciences
- Hanyang University
- Seoul 133-791, Korea
| | - Hyoung Sub Song
- Department of Chemistry and Research Institute for Natural Sciences
- Hanyang University
- Seoul 133-791, Korea
| | - Jong Hyub Park
- Department of Chemistry and Research Institute for Natural Sciences
- Hanyang University
- Seoul 133-791, Korea
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99
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Johnston RC, Cohen DT, Eichman CC, Scheidt KA, Cheong PHY. Catalytic Kinetic Resolution of a Dynamic Racemate: Highly Stereoselective β-Lactone Formation by N-Heterocyclic Carbene Catalysis. Chem Sci 2014; 5:1974-1982. [PMID: 25045464 DOI: 10.1039/c4sc00317a] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
This study describes the combined experimental and computational elucidation of the mechanism and origins of stereoselectivities in the NHC-catalyzed dynamic kinetic resolution (DKR) of α-substituted-β-ketoesters. Density functional theory computations reveal that the NHC-catalyzed DKR proceeds by two mechanisms, depending on the stereochemistry around the forming bond: 1) a concerted, asynchronous formal (2+2) aldol-lactonization process, or 2) a stepwise spiro-lactonization mechanism where the alkoxide is trapped by the NHC-catalyst. These mechanisms contrast significantly from mechanisms found and postulated in other related transformations. Conjugative stabilization of the electrophile and non-classical hydrogen bonds are key in controlling the stereoselectivity. This reaction constitutes an interesting class of DKRs in which the catalyst is responsible for the kinetic resolution to selectively and irreversibly capture an enantiomer of a substrate undergoing rapid racemization with the help of an exogenous base.
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Affiliation(s)
- Ryne C Johnston
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR, 97331, USA
| | - Daniel T Cohen
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Chad C Eichman
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Karl A Scheidt
- Department of Chemistry, Center for Molecular Innovation and Drug Discovery, Northwestern University, 2145 Sheridan Road, Evanston, IL, 60208, USA
| | - Paul Ha-Yeon Cheong
- Department of Chemistry, Oregon State University, 153 Gilbert Hall, Corvallis, OR, 97331, USA
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100
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Kang YW, Jang HY. NHC-catalyzed one-pot oxidation and oxidative esterification of allylic alcohols using TEMPO: the effect of alcohol additives. RSC Adv 2014. [DOI: 10.1039/c4ra08133a] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A combination of N-heterocyclic carbene (NHC) catalysts and 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) was proposed for the synthesis of allylic esters from allylic alcohols.
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Affiliation(s)
- Ye-Won Kang
- Department of Energy Systems Research
- Ajou University
- Suwon 443-749, Korea
| | - Hye-Young Jang
- Department of Energy Systems Research
- Ajou University
- Suwon 443-749, Korea
- Korea Carbon Capture & Sequestration R&D Center
- Deajeon 305-343, Korea
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