1
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Tang X, Mei S, Xu JF, Zhang X. Supramolecularly modulated carbon-centered radicals: toward selective oxidation from benzyl alcohol to aldehyde. Chem Commun (Camb) 2024; 60:5286-5289. [PMID: 38659373 DOI: 10.1039/d4cc01240b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
The reactivity of ketyl radicals and benzoyl radicals, two key intermediates of photo-induced oxidation of benzyl alcohol, can be stabilized by the host-guest interaction of the radicals with cucurbit[7]uril. As a result, the selectivity of photo-induced oxidation from benzyl alcohol to aldehyde is significantly improved by diminishing side reactions and inhibiting the generation of carboxylic acid products. This work presents a new route to modulate the reactivity of radical intermediates, enriching the chemistry of supramolecular intermediates and the toolbox of supramolecular catalysis.
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Affiliation(s)
- Xingchen Tang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Shan Mei
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Jiang-Fei Xu
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
| | - Xi Zhang
- Key Laboratory of Organic Optoelectronics & Molecular Engineering, Department of Chemistry, Tsinghua University, Beijing 100084, China.
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2
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Favre-Réguillon A. Comment on "CO 2 as oxidant: an unusual light-assisted catalyst free oxidation of aldehydes to acids under mild conditions" by S. R. Khan, S. Saini, K. Naresh, A. Kumari, V. Aniya, P. K. Khatri, A. Ray and S. L. Jain, Chem. Commun., 2022, 58, 2208. Chem Commun (Camb) 2023; 59:14033-14035. [PMID: 37916969 DOI: 10.1039/d3cc03070a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2023]
Abstract
Experimental data supporting the claim that CO2 could be used as an oxidant for light-assisted oxidation of aldehydes to carboxylic acids recently published by S. L. Jain et al., Chem. Commun., 2022, 58, 2208 could be mistrusted.
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Affiliation(s)
- Alain Favre-Réguillon
- Département "Chimie, Santé, Vivant", Conservatoire National des Arts et Métiers (CNAM), 292 rue Saint Martin, 75003 Paris, France.
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3
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Czieszowic Ł, Orlińska B, Lisicki D, Pankalla E. Efficient Synthesis of 2-Ethylhexanoic Acid via N-Hydroxyphthalimide Catalyzed Oxidation of 2-Ethylhexanal with Oxygen. MATERIALS (BASEL, SWITZERLAND) 2023; 16:5778. [PMID: 37687471 PMCID: PMC10489149 DOI: 10.3390/ma16175778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/17/2023] [Accepted: 08/19/2023] [Indexed: 09/10/2023]
Abstract
An efficient method for the synthesis of 2-ethylhexanoic acid has been reported. The method involves the 2-ethylhexanal oxidation using oxygen or air in the presence of N-hydroxyphthalimide in isobutanol as a solvent under mild conditions. A high selectivity of >99% for 2-ethylhexanoic acid was achieved. The influence of catalyst amount, solvent type and quantity, temperature, and reaction time on the product composition was studied. The developed method is in line with the global trends aimed at developing green oxidation processes as well as having potential for implementation in industry due to its high selectivity, cost-effective oxidizing agent, and mild reaction conditions. The use of isobutanol as a solvent is of crucial importance providing an opportunity for potential producers of 2-EHAL from butanal to employ the less valuable alcohol.
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Affiliation(s)
- Łukasz Czieszowic
- Grupa Azoty Zakłady Azotowe-Kędzierzyn-S.A., Mostowa 30A, 47-220 Kędzierzyn-Koźle, Poland
- Department of Chemical Organic Technology and Petrochemistry and PhD School, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland
| | - Beata Orlińska
- Department of Chemical Organic Technology and Petrochemistry and PhD School, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland
| | - Dawid Lisicki
- Department of Chemical Organic Technology and Petrochemistry and PhD School, Silesian University of Technology, Akademicka 2A, 44-100 Gliwice, Poland
| | - Ewa Pankalla
- Grupa Azoty Zakłady Azotowe-Kędzierzyn-S.A., Mostowa 30A, 47-220 Kędzierzyn-Koźle, Poland
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4
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Zeng K, Stückl AC, Qin J, Simon M, Spyra CJ, Li J, Meyer F, Zhang K. Iodoarene mediated efficient aerobic oxidation of aldehydes for carboxylic acids. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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5
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Yang F, Chen E, Dai Y, Xu Y, Liu Y, Bi S. Elucidation of the interaction between fructose and key aroma compounds in watermelon juice via Raman spectroscopy and nuclear magnetic resonance. Food Res Int 2022; 159:111613. [DOI: 10.1016/j.foodres.2022.111613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2022] [Revised: 06/25/2022] [Accepted: 06/29/2022] [Indexed: 11/04/2022]
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6
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Yu FL, Liu MX, Yuan B, Xie CX, Yu ST. Selective Oxidation of Primary Alcohols to Carboxylic Acids Using Lacunary Polyoxometalates Catalysts and Hydrogen Peroxide. Catal Letters 2022. [DOI: 10.1007/s10562-022-04105-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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7
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Nagy BS, Kappe CO, Ötvös SB. N
‐Hydroxyphthalimide Catalyzed Aerobic Oxidation of Aldehydes under Continuous Flow Conditions. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200124] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Bence S. Nagy
- Institute of Chemistry University of Graz NAWI Graz Heinrichstrasse 28 A-8010 Graz Austria
| | - C. Oliver Kappe
- Institute of Chemistry University of Graz NAWI Graz Heinrichstrasse 28 A-8010 Graz Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW) Research Center Pharmaceutical Engineering GmbH (RCPE) Inffeldgasse 13 A-8010 Graz Austria
| | - Sándor B. Ötvös
- Institute of Chemistry University of Graz NAWI Graz Heinrichstrasse 28 A-8010 Graz Austria
- Center for Continuous Flow Synthesis and Processing (CC FLOW) Research Center Pharmaceutical Engineering GmbH (RCPE) Inffeldgasse 13 A-8010 Graz Austria
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8
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Wang Z, Qin Y, Huang H, Li G, Xu Y, Jin P, Peng B, Zhao Y. Solvent Effect on Product Distribution in the Aerobic Autoxidation of 2-Ethylhexanal: Critical Role of Polarity. Front Chem 2022; 10:855843. [PMID: 35402373 PMCID: PMC8989829 DOI: 10.3389/fchem.2022.855843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2022] [Accepted: 03/11/2022] [Indexed: 11/13/2022] Open
Abstract
In the aerobic oxidation of aldehydes to acids, how the solvent affect the reaction remains unclear. Herein, the solvent effect in the oxidation of 2-ethylhexanal (2-ETH) to 2-ethylhexanoic acid (2-ETA) was systematically investigated. The vastly different product distributions were observed which could be ascribed to the dominant intermolecular forces. Though strong intermolecular forces in protic solvents limit the oxidation, the optimal 2-ETA yield (96%) was obtained in ipropanol via gradually evaporating the solvent to remove the interactions. Theoretical calculations further revealed that the hydrogen bonds between reactant and protic solvent increase the C-H bond energy (-CHO in 2-ETH). Meanwhile, the hydrogen bonds may improve 2-ETA selectivity by promoting H transfer in the oxidation rearrangement step. Our work discloses the critical role of polarity in determining the reactivity and selectivity of 2-ETH oxidation, and could guide the rational design of more desirable reaction processes with solvent effect.
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Affiliation(s)
- Zheng Wang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Yitong Qin
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Huijiang Huang
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Guobing Li
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Yan Xu
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
| | - Peng Jin
- School of Materials Science and Engineering, Hebei University of Technology, Tianjin, China
- *Correspondence: Peng Jin, ; Bo Peng, ; Yujun Zhao,
| | - Bo Peng
- SINOPEC Research Institute of Petroleum Processing, Beijing, China
- *Correspondence: Peng Jin, ; Bo Peng, ; Yujun Zhao,
| | - Yujun Zhao
- Key Laboratory for Green Chemical Technology of Ministry of Education, School of Chemical Engineering and Technology, Tianjin University, Tianjin, China
- *Correspondence: Peng Jin, ; Bo Peng, ; Yujun Zhao,
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9
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Vanoye L, Favre-Réguillon A. Mechanistic Insights into the Aerobic Oxidation of Aldehydes: Evidence of Multiple Reaction Pathways during the Liquid Phase Oxidation of 2-Ethylhexanal. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00399] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Laurent Vanoye
- Université Lyon, Catalyse Polymérisation Procédés & Matériaux (CP2M), UMR 5128 CNRS − CPE Lyon, 43 boulevard du 11 novembre 1918, F-69100 Villeurbanne, France
| | - Alain Favre-Réguillon
- Université Lyon, Catalyse Polymérisation Procédés & Matériaux (CP2M), UMR 5128 CNRS − CPE Lyon, 43 boulevard du 11 novembre 1918, F-69100 Villeurbanne, France
- Conservatoire National des Arts et Métiers, EPN 7, 2 rue Conté, 75003 Paris, France
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10
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Konno H, Tan A, Takamatsu K, Xu F, Osanai S. Application of Reversible Detection Method for N-Terminus Amino Groups: Solid Phase Synthesis of Stylissatin B. HETEROCYCLES 2022. [DOI: 10.3987/com-21-s(r)6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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11
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Fu X, Han Y, Chen R, Han Q, Zhang R, Li J. Selective oxidation of aldehydes by oxygen over macroporous alkaline resin. REACT CHEM ENG 2022. [DOI: 10.1039/d2re00200k] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this reaction, the oxidation of aldehydes is selectively catalyzed by basic resin D201-OH for the first time. Moreover, mild and high-yield oxidation of aldehydes can be achieved without any cocatalyst.
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Affiliation(s)
- Xiaojing Fu
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Yuchan Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Rui Chen
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Qi Han
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Rongfan Zhang
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
| | - Jun Li
- School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 201418, China
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12
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Xu D, He Y, Liu X, Xiong C, Zhou X, Xue C, Ji H. N
‐Hydroxyphthalimide‐Catalyzed Epoxidation of Inactive Aliphatic Olefins with Air at Room Temperature. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Dejing Xu
- School of Chemical Engineering and Technology Sun Yat-Sen University Zhuhai 519082 P. R. China
| | - Yaorong He
- School of Chemical Engineering and Technology Sun Yat-Sen University Zhuhai 519082 P. R. China
| | - Xiaohui Liu
- School of Chemical Engineering and Technology Sun Yat-Sen University Zhuhai 519082 P. R. China
| | - Chao Xiong
- Fine Chemical Industry Research Institute School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
| | - Xiantai Zhou
- School of Chemical Engineering and Technology Sun Yat-Sen University Zhuhai 519082 P. R. China
| | - Can Xue
- School of Chemical Engineering and Technology Sun Yat-Sen University Zhuhai 519082 P. R. China
| | - Hongbing Ji
- Fine Chemical Industry Research Institute School of Chemistry Sun Yat-Sen University Guangzhou 510275 P. R. China
- School of Chemical Engineering Guangdong University of Petrochemical Technology Maoming 525000 P. R. China
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13
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Si T, Kim HY, Oh K. One-Pot Direct Oxidation of Primary Amines to Carboxylic Acids through Tandem ortho-Naphthoquinone-Catalyzed and TBHP-Promoted Oxidation Sequence. Chemistry 2021; 27:18150-18155. [PMID: 34755925 DOI: 10.1002/chem.202103450] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Indexed: 12/11/2022]
Abstract
Biomimetic oxidation of primary amines to carboxylic acids has been developed where the copper-containing amine oxidase (CuAO)-like o-NQ-catalyzed aerobic oxidation was combined with the aldehyde dehydrogenase (ALDH)-like TBHP-mediated imine oxidation protocol. Notably, the current tandem oxidation strategy provides a new mechanistic insight into the imine intermediate and the seemingly simple TBHP-mediated oxidation pathways of imines. The developed metal-free amine oxidation protocol allows the use of molecular oxygen and TBHP, safe forms of oxidant that may appeal to the industrial application.
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Affiliation(s)
- Tengda Si
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul, 06974, Republic of Korea
| | - Hun Young Kim
- Department of Global Innovative Drugs, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul, 06974, Republic of Korea
| | - Kyungsoo Oh
- Center for Metareceptome Research, Graduate School of Pharmaceutical Sciences, Chung-Ang University, 84 Heukseok-ro, Dongjak, Seoul, 06974, Republic of Korea
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14
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Babaee S, Zarei M, Zolfigol MA. MOF-Zn-NHC as an efficient N-heterocyclic carbene catalyst for aerobic oxidation of aldehydes to their corresponding carboxylic acids via a cooperative geminal anomeric based oxidation. RSC Adv 2021; 11:36230-36236. [PMID: 35492781 PMCID: PMC9043340 DOI: 10.1039/d1ra05494e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 10/17/2021] [Indexed: 12/21/2022] Open
Abstract
As an efficient heterogenous N-heterocyclic carbene (NHC) catalyst, MOF-Zn-NHC was used in the aerobic oxidation of aryl aldehydes to their corresponding carbocyclic acids via an anomeric based oxidation. Features such as mild reaction conditions and no need for a co-catalyst or oxidative reagent can be considered as the major advantages of the presented method in this study. As an efficient heterogenous N-heterocyclic carbene (NHC) catalyst, MOF-Zn-NHC was used in the aerobic oxidation of aryl aldehydes to their corresponding carbocyclic acids via an anomeric based oxidation.![]()
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Affiliation(s)
- Saeed Babaee
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University Hamedan 6517838683 Iran +988138380709 +988138282807
| | - Mahmoud Zarei
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University Hamedan 6517838683 Iran +988138380709 +988138282807
| | - Mohammad Ali Zolfigol
- Department of Organic Chemistry, Faculty of Chemistry, Bu-Ali Sina University Hamedan 6517838683 Iran +988138380709 +988138282807
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15
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Xu S, Zhang X, Xiong W, Li P, Ma W, Hu X, Wu Y. Aerobic oxidation of aldehydes to acids in water with cyclic (alkyl)(amino)carbene copper under mild conditions. Chem Commun (Camb) 2021; 58:2132-2135. [PMID: 34704994 DOI: 10.1039/d1cc04812k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this work, cyclic (alkyl)(amino)carbene copper ((CAAC)Cu) catalyzed aerobic oxidation of aldehydes in water at room temperature has been reported. Good to excellent yields were obtained using different substrates. A possible reaction mechanism was proposed, in which (CAAC)Cu dioxygen activates the C-H bond of aldehyde with a low barrier of 10.6 kcal mol-1.
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Affiliation(s)
- Songbo Xu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Shandong Kanbo Biochemical Technology Co., Ltd, Dongying, 257400, P. R. China
| | - Xiaomin Zhang
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
| | - Wenjie Xiong
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Ping Li
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Wentao Ma
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China.
| | - Xingbang Hu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
| | - Youting Wu
- School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, P. R. China. .,Yuxiu Postdoctoral Institute, Nanjing University, Nanjing 210023, P. R. China
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16
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Takamatsu K, Kasai M, Nishizawa H, Suzuki R, Konno H. Aerobic oxidation of aldehydes to acids with N-hydroxyphthalimide derivatives. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2021.153320] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Xie P, Xue C, Du D, Shi S. Photo-induced oxidative cleavage of C-C double bonds for the synthesis of biaryl methanone via CeCl 3 catalysis. Org Biomol Chem 2021; 19:6781-6785. [PMID: 34312650 DOI: 10.1039/d1ob01002f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A Ce-catalyzed strategy is developed to produce biaryl methanones via photooxidative cleavage of C-C double bonds at room temperature. This reaction is performed under air and demonstrates high activity as well as functional group tolerance. A synergistic Ce/ROH catalytic mechanism is also proposed based on the experimental observations. This protocol should be the first successful Ce-catalyzed photooxidation reaction of olefins with air as the oxidant, which would provide inspiration for the development of novel Ce-catalyzed photochemical synthesis processes.
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Affiliation(s)
- Pan Xie
- College of Chemistry and Chemistry Engineering, Shaanxi Key Laboratory of Chemistry Additives for Industry, Shaanxi University of Science & Technology, Xi'an 710021, China.
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18
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Wang L, Zhang Y, Yao J, Li H. Metal-Free Synthesis of Sulfones and Sulfoxides through Aldehyde-Promoted Aerobic Oxidation of Sulfides. Catal Letters 2021. [DOI: 10.1007/s10562-021-03706-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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19
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Li JS, Xie XY, Jiang S, Yang PP, Li ZW, Lu CH, Liu WD. Reagent-free aerobic oxidative synthesis of amides from aldehydes and isothiocyanates. Org Chem Front 2021. [DOI: 10.1039/d0qo01264e] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A reagent-free autoxidative reaction of aldehydes with isothiocyanates is developed to readily access amides, involving capture of carboxylic acids in situ generated from aldehydes by isothiocyanates as both coupling mediators and amine surrogates.
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Affiliation(s)
- Jiang-Sheng Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Xin-Yun Xie
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Si Jiang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Pan-Pan Yang
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Zhi-Wei Li
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Cui-Hong Lu
- Hunan Provincial Key Laboratory of Materials Protection for Electric Power and Transportation
- School of Chemistry and Food Engineering
- Changsha University of Science & Technology
- Changsha
- China
| | - Wei-Dong Liu
- National Engineering Research Center for Agrochemicals
- Hunan Research Institute of Chemical Industry
- Changsha 410007
- China
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20
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1,1,1,3,3,3-Hexafluoroisopropanol as an efficient medium for the room temperature oxidation of styrenes to benzaldehydes. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.152527] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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21
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Ötvös SB, Llanes P, Pericàs MA, Kappe CO. Telescoped Continuous Flow Synthesis of Optically Active γ-Nitrobutyric Acids as Key Intermediates of Baclofen, Phenibut, and Fluorophenibut. Org Lett 2020; 22:8122-8126. [PMID: 33026815 PMCID: PMC7573919 DOI: 10.1021/acs.orglett.0c03100] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Indexed: 02/07/2023]
Abstract
The two-step flow asymmetric synthesis of chiral γ-nitrobutyric acids as key intermediates of the GABA analogues baclofen, phenibut, and fluorophenibut is reported on a multigram scale. The telescoped process comprises an enantioselective Michael-type addition facilitated by a polystyrene-supported heterogeneous organocatalyst under neat conditions followed by in situ-generated performic acid-mediated aldehyde oxidation. Simple access to valuable optically active substances is provided with key advances in terms of productivity and sustainability compared to those of previous batch approaches.
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Affiliation(s)
- Sándor B. Ötvös
- Institute
of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria
- Center
for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010 Graz, Austria
| | - Patricia Llanes
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, E-43007 Tarragona, Spain
| | - Miquel A. Pericàs
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology (BIST), Av. Països Catalans 16, E-43007 Tarragona, Spain
- Departament
de Química Inorgànica i Orgànica, Universitat de Barcelona (UB), E-08028 Barcelona, Spain
| | - C. Oliver Kappe
- Institute
of Chemistry, University of Graz, NAWI Graz, Heinrichstrasse 28, A-8010 Graz, Austria
- Center
for Continuous Flow Synthesis and Processing (CC FLOW), Research Center Pharmaceutical Engineering GmbH (RCPE), Inffeldgasse 13, A-8010 Graz, Austria
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22
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Chen W, Tang H, Wang W, Fu Q, Luo J. Catalytic Aerobic Dehydrogenatin of
N
‐Heterocycles by
N
‐Hydoxyphthalimide. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000767] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Weidong Chen
- School of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 People's Republic of China
| | - Hao Tang
- School of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 People's Republic of China
| | - Weilin Wang
- School of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 People's Republic of China
| | - Qiang Fu
- School of Pharmacy Southwest Medical University Luzhou 610041 People's Republic of China
| | - Junfei Luo
- School of Materials Science and Chemical Engineering Ningbo University Ningbo Zhejiang 315211 People's Republic of China
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23
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Deng Z, Zhou D. Mechanisms of Csp
2
–H functionalization of aldehydes with triplet O
2
catalyzed by NHPI: A density functional theory investigation. J PHYS ORG CHEM 2020. [DOI: 10.1002/poc.4112] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zhe‐Peng Deng
- Research Institute Lanzhou Jiaotong University Lanzhou China
| | - Da‐Gang Zhou
- Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, Institute of Synthesis and Application of Functional Materials, College of Chemistry and Chemical Engineering China West Normal University Nanchong China
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Suzuki R, Konno H. Stain Protocol for the Detection of N-Terminal Amino Groups during Solid-Phase Peptide Synthesis. Org Lett 2020; 22:3309-3312. [DOI: 10.1021/acs.orglett.0c00445] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Rio Suzuki
- Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
| | - Hiroyuki Konno
- Department of Biochemical Engineering, Graduate School of Science and Engineering, Yamagata University, Yonezawa, Yamagata 992-8510, Japan
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