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Li YW, Lei J, Chen ZZ, Lv ML. Copper-catalyzed C2-selective alkynylation of chromones via 1,4-conjugate addition. Mol Divers 2024; 28:125-131. [PMID: 36881209 DOI: 10.1007/s11030-023-10625-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Accepted: 02/18/2023] [Indexed: 03/08/2023]
Abstract
Copper-catalyzed selective alkynylation with N-propargyl carboxamides as nucleophiles has been successfully developed for the synthesis of C2-functionalized chromanones. Under optimized reaction conditions, 21 examples were obtained in one-pot procedure through 1,4-conjugate addition. This protocol features readily available feedstocks, easy operations, and moderate to good yields, which provides viable access to pharmacologically active C2-functionalized chromanones.
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Affiliation(s)
- Yan-Wu Li
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China
| | - Jie Lei
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
| | - Zhong-Zhu Chen
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, IATTI, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
| | - Meng-Lan Lv
- School of Chemistry and Chemical Engineering, Guizhou University, Guiyang, 550025, China.
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Ye Q, Xu H, Wang Q, Huo X, Wang Y, Huang X, Zhou G, Lu J, Zhang J. New insights into the mechanisms of tartaric acid enhancing homogeneous and heterogeneous copper-catalyzed Fenton-like systems. J Hazard Mater 2021; 407:124351. [PMID: 33144019 DOI: 10.1016/j.jhazmat.2020.124351] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Revised: 10/04/2020] [Accepted: 10/19/2020] [Indexed: 06/11/2023]
Abstract
The specific roles of tartaric acid (TA), as an eco-friendly ligand, in homogeneous and heterogeneous copper-catalyzed systems were systematically revealed and new mechanisms of TA enhancing the three Fenton-like processes were proposed to provide a theoretical significance in overcoming the deficiency of conventional Fenton processes. The results identified hydroxyl radical (•OH) as the main species responsible for the simultaneous decomposition of TA and metronidazole (MNZ) according to TOC removal. The ESR technique was used to detect superoxide radicals (•O2-), carbon-centered radical (•R) and hydrogen radical (•H) in the Cu2+/TA/H2O2 system, which contributed to the acceleration of the Cu2+/Cu+ redox cycle. The enhancing effect of TA on the homogeneous process was ascribed to the formation of a soluble complex with Cu2+, which favored the pH range extension, Cu+ oxidation, and radical generation. Moreover, the adsorption of TA on the catalysts surface promoted the consumption of H2O2, inducing •OH generation. The formed surface complex (≡Cu2+-TA) also accelerated the regeneration of ≡Cu+, which was confirmed by density functional theory (DFT) calculation and surface characterization analysis (SEM, XRD, and XPS). The possible degradation pathways of MNZ in TA-modified Fenton-like system were also clarified.
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Affiliation(s)
- Qian Ye
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Hao Xu
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Qingguo Wang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Xiaowei Huo
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Yunqi Wang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Xue Huang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Guanyu Zhou
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Jinfeng Lu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China
| | - Jing Zhang
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China.
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Testa C, Papini AM, Chorev M, Rovero P. Copper-Catalyzed Azide-Alkyne Cycloaddition (CuAAC)-Mediated Macrocyclization of Peptides: Impact on Conformation and Biological Activity. Curr Top Med Chem 2018; 18:591-610. [PMID: 29773065 DOI: 10.2174/1568026618666180518095755] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2018] [Revised: 05/04/2018] [Accepted: 05/05/2018] [Indexed: 11/22/2022]
Abstract
The long-lasting impetus to design novel modes of macrocyclization, and their implementation into a wide range of bioactive peptides, originates from their contributions to the restriction of conformational space and the stabilization of preferential bioactive conformations that support higher efficacy and binding affinity to cognate macromolecular targets, improved specificity and lowering susceptibility to enzymatic degradation processes. Introducing CuI-catalyzed azide-alkyne cycloaddition (CuAAC), a prototypical click reaction, to the field of peptide sciences as a bio-orthogonal reaction that generates a disubstituted-[1,2,3]triazol-1-yl moiety as a pseudopeptidic bond that is peptidomimetic in nature, paved the way to its widespread application as a new and promising mode of macrocyclization. This review presents the state-of-art of CuAAC-mediated macrocyclization as it applies to an expansive range of bioactive peptides and explores the relationship among the structural diversity of CuAACmediated cyclizations, biological activities and conformations.
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Affiliation(s)
- Chiara Testa
- French-Italian Interdepartmental Laboratory of Peptide and Protein Chemistry and Biology, University of Florence, 50019, Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy.,PeptLab@UCP and Laboratory of Chemical Biology EA4505, Université Paris-Seine, 5 Mail Gay-Lussac, 95031 Cergy-Pontoise, France
| | - Anna Maria Papini
- French-Italian Interdepartmental Laboratory of Peptide and Protein Chemistry and Biology, University of Florence, 50019, Sesto Fiorentino, Italy.,Department of Chemistry "Ugo Schiff", University of Florence, Via della Lastruccia 13, 50019 Sesto Fiorentino, Italy.,PeptLab@UCP and Laboratory of Chemical Biology EA4505, Université Paris-Seine, 5 Mail Gay-Lussac, 95031 Cergy-Pontoise, France
| | - Michael Chorev
- Laboratory for Translational Research, Division of Hematology, Department of Medicine, Brigham and Women`s Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, United States
| | - Paolo Rovero
- French-Italian Interdepartmental Laboratory of Peptide and Protein Chemistry and Biology, University of Florence, 50019, Sesto Fiorentino, Italy.,Department of Neurosciences, Psychology, Drug Research and Child Health - Section of Pharmaceutical Sciences and Nutraceutics, University of Florence, Via Ugo Schiff 6, 50019, Sesto Fiorentino, Italy
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