1
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Zeng M, Chen JL, Luo X, Zou YJ, Liu ZN, Dai J, Jiang DZ, Li JJ. Oxygen-Free Csp 3-H Oxidation of Pyridin-2-yl-methanes to Pyridin-2-yl-methanones with Water by Copper Catalysis. Molecules 2023; 28:7587. [PMID: 38005308 PMCID: PMC10673412 DOI: 10.3390/molecules28227587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/03/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023] Open
Abstract
Aromatic ketones are important pharmaceutical intermediates, especially the pyridin-2-yl-methanone motifs. Thus, synthetic methods for these compounds have gained extensive attention in the last few years. Transition metals catalyze the oxidation of Csp3-H for the synthesis of aromatic ketones, which is arresting. Here, we describe an efficient copper-catalyzed synthesis of pyridin-2-yl-methanones from pyridin-2-yl-methanes through a direct Csp3-H oxidation approach with water under mild conditions. Pyridin-2-yl-methanes with aromatic rings, such as substituted benzene, thiophene, thiazole, pyridine, and triazine, undergo the reaction well to obtain the corresponding products in moderate to good yields. Several controlled experiments are operated for the mechanism exploration, indicating that water participates in the oxidation process, and it is the single oxygen source in this transformation. The current work provides new insights for water-involving oxidation reactions.
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Affiliation(s)
- Ming Zeng
- School of Pharmacy and Life Science, Jiujiang University, Jiujiang 332005, China; (M.Z.)
| | - Jia-Le Chen
- School of Pharmacy and Life Science, Jiujiang University, Jiujiang 332005, China; (M.Z.)
| | - Xue Luo
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China; (X.L.)
| | - Yan-Jiao Zou
- School of Pharmacy and Life Science, Jiujiang University, Jiujiang 332005, China; (M.Z.)
| | - Zhao-Ning Liu
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China; (X.L.)
| | - Jun Dai
- Analytical and Testing Center, Jiujiang University, Jiujiang 332005, China
| | - Deng-Zhao Jiang
- School of Pharmacy and Life Science, Jiujiang University, Jiujiang 332005, China; (M.Z.)
- Jiujiang Key Laboratory for the Development and Utilization of Traditional Chinese Medicine Resources in Northwest Jiangxi, Jiujiang 332005, China
| | - Jin-Jing Li
- College of Pharmacy, Jiamusi University, Jiamusi 154007, China; (X.L.)
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2
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Huang FH, Li MJ, He ZY, Zhu QY, Huang ZM, Li QH, Xu H, Zhang Z. Aerobic CuBr 2-Catalyzed Oxidative Coupling Reaction of Amidines with Exocyclic α,β-Unsaturated Cycloketones for the Synthesis of Spiroimidazolines. J Org Chem 2023. [PMID: 37155411 DOI: 10.1021/acs.joc.3c00016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
A CuBr2-catalyzed cascade reaction of amidines with exocyclic α,β-unsaturated cycloketones was developed, affording a large variety of spiroimidazolines in moderate to excellent yields. The reaction process involved the Michael addition and copper(II)-catalyzed aerobic oxidative coupling, in which O2 from air acted as the oxidant and H2O was the sole byproduct.
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Affiliation(s)
- Fei-Hong Huang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Ming-Jun Li
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Zeng-Yang He
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
- Technology Center, China Tobacco Anhui Industrial Co., Ltd., 9 Tianda Road, Hefei 230088, P. R. China
| | - Qi-Yue Zhu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Ze-Ming Huang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Qing-Hai Li
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Hui Xu
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
| | - Ze Zhang
- School of Chemical and Environmental Engineering, Anhui Polytechnic University, Wuhu 241000, P. R. China
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3
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Pedersen S, Batista GMF, Henriksen ML, Hammershøj HC, Hopmann KH, Skrydstrup T. Lignocellulose Conversion via Catalytic Transformations Yields Methoxyterephthalic Acid Directly from Sawdust. JACS AU 2023; 3:1221-1229. [PMID: 37124285 PMCID: PMC10131214 DOI: 10.1021/jacsau.3c00092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 05/03/2023]
Abstract
Poly(ethylene terephthalate) polyester represents the most common class of thermoplastic polymers widely used in the textile, bottling, and packaging industries. Terephthalic acid and ethylene glycol, both of petrochemical origin, are polymerized to yield the polyester. However, an earlier report suggests that polymerization of methoxyterephthalic acid with ethylene glycol provides a methoxy-polyester with similar properties. Currently, there are no established biobased synthetic routes toward the methoxyterephthalic acid monomer. Here, we show a viable route to the dicarboxylic acid from various tree species involving three catalytic steps. We demonstrate that sawdust can be converted to valuable aryl nitrile intermediates through hydrogenolysis, followed by an efficient fluorosulfation-catalytic cyanation sequence (>90%) and then converted to methoxyterephthalic acid by hydrolysis and oxidation. A preliminary polymerization result indicates a methoxy-polyester with acceptable thermal properties.
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Affiliation(s)
- Simon
S. Pedersen
- Carbon
Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience
Center, Department of Chemistry, Aarhus
University; Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Gabriel M. F. Batista
- Carbon
Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience
Center, Department of Chemistry, Aarhus
University; Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Martin L. Henriksen
- Department
of Biological and Chemical Engineering, Aarhus University; Aabogade
40, 8200 Aarhus
N, Denmark
| | - Hans Christian
D. Hammershøj
- Carbon
Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience
Center, Department of Chemistry, Aarhus
University; Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
| | - Kathrin H. Hopmann
- Department
of Chemistry, UiT - The Arctic University
of Norway, N-9037 Tromsø, Norway
| | - Troels Skrydstrup
- Carbon
Dioxide Activation Center (CADIAC), Interdisciplinary Nanoscience
Center, Department of Chemistry, Aarhus
University; Gustav Wieds Vej 14, 8000 Aarhus C, Denmark
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4
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Mazibuko M, Jeena V. Synthesis of 2,4,5-Trisubstituted Oxazoles from Copper-Mediated Benzylic sp 3 C-H Aerobic Oxidative Annulation of Ketones and Amines via a Cascade Reaction. J Org Chem 2023; 88:1227-1234. [PMID: 36575054 DOI: 10.1021/acs.joc.2c02148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
The functionalization of sp3 carbons is deemed challenging in synthetic organic chemistry yet has tremendous potential in producing potent organic compounds. A facile synthesis of 2,4,5-trisubstituted oxazoles through an oxidative, copper-catalyzed, and solvent-free annulation is described. Various arylated oxazoles were efficaciously synthesized at a mild temperature from readily available substrates under a molecular oxygen atmosphere. Preliminary mechanistic studies suggested that the reaction proceeds via an anionic-type mechanism and indicated the formation of a keto-imine intermediate. The reaction is notable for the abstraction of six hydrogen atoms, the functionalization of one sp2 carbon and two sp3 carbons, and the formation of C-O and C-N bonds.
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Affiliation(s)
- Mncedisi Mazibuko
- School of Chemistry and Physics, University of KwaZulu-Natal, Scottsville, Pietermaritzburg 3209, South Africa
| | - Vineet Jeena
- School of Chemistry and Physics, University of KwaZulu-Natal, Scottsville, Pietermaritzburg 3209, South Africa
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5
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Bhatt D, Kim HY, Oh K. Cu(OTf)2‐Catalyzed Aerobic Cycloisomerization of Alkenyl Sulfones to Furans Using (E)‐β‐Chlorovinyl Ketones and Sodium Sulfinates. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Divya Bhatt
- Chung-Ang University KOREA (THE REPUBLIC OF)
| | | | - Kyungsoo Oh
- Chung-Ang University KOREA (THE REPUBLIC OF)
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6
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Deepake SK, Kumar M, Kumar P, DAS UTPAL. α‐Angelica Lactone Catalysed Oxidation of Pyrrolidines to Lactams. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Siddharth K Deepake
- National Chemical Laboratory CSIR Division of Organic Chemistry 411008 Pune INDIA
| | - Manish Kumar
- National Chemical Laboratory CSIR Division of Organic Chemistry 411008 Pune INDIA
| | - Pawan Kumar
- National Chemical Laboratory CSIR Division of Organic Chemistry 411008 Pune INDIA
| | - UTPAL DAS
- National Chemical Laboratory CSIR Division of Organic Chemistry Pashan Road411008411008 411008 Pune INDIA
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7
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Shen MH, Guo B, Li C, Sun CL, Zhu YF, Zhu C, Xu HD, Xu D. Aerobic copper-catalyzed homo-coupling of azaallyl anions: a facile access to vicinal diamines. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.153886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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8
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Li T, Yang J, Yin X, Shi J, Cao Q, Hu M, Xu X, Li M, Shen Z. Visible-light-mediated aerobic Ritter-type C–H amination of diarylmethanes using DDQ/ tert-butyl nitrite. Org Biomol Chem 2022; 20:8756-8760. [DOI: 10.1039/d2ob01713j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A metal-free photocatalytic Ritter-type C–H amination of diarylmethanes using O2 as an oxidant has been developed using a co-catalytic system of DDQ and TBN and offers a low cost, sustainable way to synthesise secondary amides under mild conditions.
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Affiliation(s)
- Tianci Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Jiangyu Yang
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
- Zhejiang Jitai New Materials Co., Ltd, Shaoxing 312369, China
| | - Xin Yin
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
- Zhejiang Jitai New Materials Co., Ltd, Shaoxing 312369, China
| | - Jinhua Shi
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Qun Cao
- School of Chemistry and Chemical Engineering, Queen's University Belfast, David Keir Building, Belfast, BT9 5AG, UK
| | - Miaomiao Hu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Xiaowen Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Meichao Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
| | - Zhenlu Shen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, 310014, China
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9
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Dong Z, Pan H, Yang L, Fan L, Xiao Y, Chen J, Wang W. Porous organic polymer immobilized copper nanoparticles as heterogeneous catalyst for efficient benzylic C–H bond oxidation. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2021.101397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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10
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Nozawa-Kumada K, Matsuzawa Y, Ono K, Shigeno M, Kondo Y. Copper-catalyzed aerobic double functionalization of benzylic C(sp 3)-H bonds for the synthesis of 3-hydroxyisoindolinones. Chem Commun (Camb) 2021; 57:8604-8607. [PMID: 34368822 DOI: 10.1039/d1cc02870g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A copper-catalyzed aerobic 3-hydroxyisoindolinone synthesis was developed via the benzylic double C(sp3)-H functionalization of 2-alkylbenzamides. In this reaction, molecular oxygen was used as both an oxidant for C(sp3)-H functionalization and an oxygen source. Our method can be extended to diverse benzylic C(sp3)-H bonds and shows excellent functional group tolerance.
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Affiliation(s)
- Kanako Nozawa-Kumada
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai 980-8578, Japan.
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