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Zhao Q, Wang Y, Wang Y, Hu Q, Yao J, Wen Z, Li H. Control of Selectivity in FeCl 3 -Catalyzed Aerobic Oxidation of Cycloketones. Chem Asian J 2023; 18:e202201101. [PMID: 36519526 DOI: 10.1002/asia.202201101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/12/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
The FeCl3 -catalyzed aerobic oxidation of ketones always gives rise to the α-C-C cleavage product, having challenges to afford hydroxyl keto compounds. Here we report an effective control of the main product from keto acid to α-hydroxyl ketone, by reducing the concentration of FeCl3 catalyst, together with the use of DMSO as the solvent. In addition, mechanistic investigations suggested the same FeCl3 -coordinated peroxide intermediate for both hydroxylation and C-C cleavage routes, and emphasize the role of DMSO as both ligand and reductant. This work provides a new approach for selective aerobic oxidation under Lewis acid catalysis.
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Affiliation(s)
- Qi Zhao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Yongtao Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
- Center of Chemistry for Frontier Technologies, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Yu Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Qixuan Hu
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Jia Yao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Zeyu Wen
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
| | - Haoran Li
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
- State Key Laboratory of Chemical Engineering and College of Chemical and Biological Engineering, Zhejiang University, Zhe Da Rd. 38, Hangzhou, 310027, P. R. China
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2
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Zhang X, Yu Y, Li W, Shi L, Li H. Access to α-Hydroxy Amides via a Practical Metal-Free “One-Pot” Tandem Reaction Involving Aerobic C(sp 3)–H Hydroxylation and C(sp 2)–C(sp 3) Cleavage. J Org Chem 2022; 87:16263-16275. [DOI: 10.1021/acs.joc.2c01839] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- Xiao Zhang
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Yang Yu
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Wenjie Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
| | - Lei Shi
- Döhler Food & Beverage Ingredients (Shanghai) Co., Ltd., 739 Shennan Road, Shanghai 201108, China
| | - Hao Li
- State Key Laboratory of Bioreactor Engineering, Shanghai Key Laboratory of New Drug Design, and School of Pharmacy, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China
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3
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Fritz-Langhals E. Unique Superbase TBD (1,5,7-Triazabicyclo[4.4.0]dec-5-ene): From Catalytic Activity and One-Pot Synthesis to Broader Application in Industrial Chemistry. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elke Fritz-Langhals
- Department of Chemistry, Technical University of Munich (TUM), Lichtenbergstraße 4, D-85747 Garching, Germany
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4
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Wang Y, Sun W, Lu R, Wen Z, Yao J, Li H. Inorganic Bases Enhanced Organocatalysis for Aerobic αHydroxylation of Aliphatic Cycloketones. ASIAN J ORG CHEM 2022. [DOI: 10.1002/ajoc.202200443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Yongtao Wang
- Zhejiang University Department of Chemistry CHINA
| | - Wenjing Sun
- Zhejiang University Department of Chemistry CHINA
| | - Rui Lu
- Zhejiang University Department of Chemistry CHINA
| | - Zeyu Wen
- Zhejiang University Department of Chemistry CHINA
| | - Jia Yao
- Zhejiang University Department of Chemistry CHINA
| | - Haoran Li
- Zhejiang University Department of Chemistry Zheda Road 310027 Hangzhou CHINA
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5
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Sun W, Wang Y, Wen Z, Yao J, Li H. Mechanistic insights on base-DMSO mediated aerobic oxidation of (hetero)benzylic C-H bonds. MOLECULAR CATALYSIS 2022. [DOI: 10.1016/j.mcat.2022.112645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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6
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Dong B, Xu G, Yang R, Wang Q. Chemical Upcycling of Poly(ε-caprolactone) to Valuable Chemical via TBD-Catalyzed Efficient Methanolysis Strategy. Chem Asian J 2022; 17:e202200667. [PMID: 35983673 DOI: 10.1002/asia.202200667] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 08/01/2022] [Indexed: 11/09/2022]
Abstract
As a petroleum-derived polyester material, poly(ε-caprolactone) (PCL) plays an essential role in biomedical field due to its excellent biocompatibility and non-toxicity. With the increasing use of PCL in recent years, its waste disposal has become a significant challenge. To address this challenge, we demonstrate a high-efficiency organocatalysis strategy for the chemical upcycling of PCL to valuable chemical. Among organocatalysts explored in this article, 1,5,7-triazabicyclo[4,4,0]dec-5-ene (TBD) shows superior performance for transforming end-of-life poly(ε-caprolactone) into highly value-added methyl 6-hydroxyhexanoate with quantitative conversion in a short time. The endwise unzipping depolymerization mechanism is corroborated by monitoring molecular weight during depolymerization process and 1 H NMR control experiments. Furthermore, this approach is also practicable for large-scale depolymerization for commercial PCL plastics, providing idea for promoting the sustainable development of PCL plastics.
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Affiliation(s)
- Bingzhe Dong
- Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences, Bio-based materials, CHINA
| | - Guangqiang Xu
- Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences, Bio-based Materials, CHINA
| | - Rulin Yang
- Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences, Bio-based Materials, CHINA
| | - Qinggang Wang
- Qingdao Institute of BioEnergy and Bioprocess Technology Chinese Academy of Sciences, Bio-based Materials, Songling Road 189., 266101, Qingdao, CHINA
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7
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Xu C, Li X, Bai L. Direct Aerobic α-Hydroxylation of Arylacetates for the Synthesis of Mandelates. J Org Chem 2022; 87:4298-4304. [PMID: 35245055 DOI: 10.1021/acs.joc.1c03149] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aerobic α-hydroxylation of α-methylene esters has proven challenging due to overoxidation and hydrolysis of the materials. In this article, KOtBu-promoted TBAB-catalyzed α-hydroxylation of α-methylene aryl esters using O2 as the oxygen source has been developed. Both low reaction temperature and catalyst TBAB are keys to success. This reaction provides an environmentally friendly and low-cost approach to mandelates, which are valuable building blocks and widely present in pharmaceuticals.
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Affiliation(s)
- Changming Xu
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Xiangfan Li
- School of Chemistry and Chemical Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Lei Bai
- College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou 730070, China
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Li H, Wang Y, Yao J. Aerobic Oxidations via Organocatalysis: A Mechanistic Perspective. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1661-6124] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractThis review focuses on recent advances and mechanistic views of aerobic C(sp3)–H oxidations catalyzed by organocatalysts, where metal catalysis and photocatalysis are not included.1 Introduction2 Carbanion Route: TBD-Catalyzed C(sp3)–H Oxygenation2.1 α-Hydroxylation of Ketones2.2 Carbonylation of Benzyl C(sp3)–H3 Radical Route: NHPI-Catalyzed C(sp3)–H Oxidation3.1 N-Oxyl Radicals and Mechanisms3.2 Oxygenation of Benzyl C(sp3)–H3.3 Solvent Effects4 Hydride-Transfer Route: TEMPO-Catalyzed Oxidations4.1 Oxoammonium Cation and Mechanisms4.2 Dehydrogenation of Alcohols4.3 Oxygenation of Benzyl C(sp3)–H5 Conclusions and Outlook
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Affiliation(s)
- Haoran Li
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University
- State Key Laboratory of Chemical Engineering and College of Chemical and Biological Engineering, Zhejiang University
| | - Yongtao Wang
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University
- Center of Chemistry for Frontier Technologies, Zhejiang University
| | - Jia Yao
- Department of Chemistry and ZJU-NHU United R&D Center, Zhejiang University
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Thiruvengetam P, Chand DK. Controlled and Predictably Selective Oxidation of Activated and Unactivated C(sp3)–H Bonds Catalyzed by a Molybdenum-Based Metallomicellar Catalyst in Water. J Org Chem 2022; 87:4061-4077. [DOI: 10.1021/acs.joc.1c02855] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
| | - Dillip Kumar Chand
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India
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10
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Visible light-promoted enantioselective aerobic oxidation of pyrazolones by phase transfer catalysis. GREEN SYNTHESIS AND CATALYSIS 2021. [DOI: 10.1016/j.gresc.2021.11.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Wang Y, Wen Z, Zhang Y, Wang X, Yao J, Li H. Aerobic α-hydroxylation of 2-Me-1-tetralone in 1-alkyl-3-methylimidazolium ionic liquids. Phys Chem Chem Phys 2021; 23:5864-5869. [PMID: 33687394 DOI: 10.1039/d0cp06047j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The aerobic α-hydroxylation of 2-Me-1-tetralone was investigated in imidazol-based ionic liquids (ILs), where reactions in 1-alkyl-3-methylimidazolium tetrafluoroborates were found to generate considerable products. By correlating the conversion at 2 h with viscosity, relative permittivity and the ET(30) value of ILs, we found that the local polarity in ILs represented by the ET(30) value or the chemical shift of α-proton at the substrate was the critical factor influencing the reaction rate. Furthermore, two-dimensional nuclear Overhauser effect spectroscopy (2D NOESY) was used to characterize the distribution of 2-Me-1-tetralone in ILs. As a result, the mesoscopic structures in ILs were recommended to have crucial influences on the distribution of the substrate in ILs, and the caused local polarity could affect the activation of 2-Me-1-tetralone. These findings revealed the solvent effects of ILs with different structures on the α-hydroxylation of 2-Me-1-tetralone, and may encourage the explorations of more types of aerobic oxidations in ILs.
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Affiliation(s)
- Yongtao Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China
| | - Zeyu Wen
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and Center of Chemistry for Frontier Technologies, Zhejiang University, Hangzhou, 310027, China
| | - Yue Zhang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Xinyu Wang
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Jia Yao
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China.
| | - Haoran Li
- Department of Chemistry, ZJU-NHU United R&D Center, Zhejiang University, 38 Zheda Road, Hangzhou, 310027, China. and State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou, 310027, China
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