1
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Liu L, Liu J, Li S, Yang M, Zhao X, Lu K. Visible light induced hydroxyfluoroalkylation of quinoxalin-2(1 H)-ones with N-trifluoroethoxyphthalimide under catalyst-free conditions. Org Biomol Chem 2024. [PMID: 39587952 DOI: 10.1039/d4ob01616e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2024]
Abstract
For the first time, we achieved visible light-induced direct C3-hydroxyfluoroalkylation of quinoxalin-2(1H)-ones using N-trifluoroethoxyphthalimide as the trifluoroethanol radical precursor, without the need for a photocatalyst. The metal-free and catalyst-free nature of this method makes it an efficient and environmentally friendly approach for synthesizing C3-hydroxyfluoroalkylated quinoxalin-2(1H)-ones.
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Affiliation(s)
- Liting Liu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, TianJin University of Science &Technology, TianJin 300457, China.
| | - Jing Liu
- Department of Chemistry, College of Sciences, Tianjin University of Science &Technology, Tianjin 300457, China
| | - Siqi Li
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, TianJin University of Science &Technology, TianJin 300457, China.
| | - Mengfei Yang
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, TianJin University of Science &Technology, TianJin 300457, China.
| | - Xia Zhao
- College of Chemistry, TianJin Key Laboratory of Structure and Performance for Functional Molecules, TianJin Normal University, TianJin, 300387, China
| | - Kui Lu
- China International Science and Technology Cooperation Base of Food Nutrition/Safety and Medicinal Chemistry, College of Biotechnology, TianJin University of Science &Technology, TianJin 300457, China.
- Department of Chemistry, College of Sciences, Tianjin University of Science &Technology, Tianjin 300457, China
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2
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Thakur A, Gupta SS, Sumit, Sachin, Sharma U. Visible-Light-Mediated Trifluoroalkylation of Isoquinolines via Three-Component Minisci-Type Reaction. Org Lett 2024; 26:8515-8520. [PMID: 39348629 DOI: 10.1021/acs.orglett.4c03096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/02/2024]
Abstract
A sustainable photocatalytic approach has been established for trifluoroalkylation of isoquinoline via a three-component Minisci-type reaction using a green solvent. The polarity reversal radical cascade strategy renders the selective addition of an electrophilic CF3 radical to an olefin to forge a nucleophilic C-centered radical. This multicomponent approach is operationally simple and environmentally benign with various functional groups, viz. aldehydes, acetals, amides, and halides. Mechanistic investigations were carried out to elaborate the reductive quenching catalytic pathway.
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Affiliation(s)
- Ankita Thakur
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Shiv Shankar Gupta
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sumit
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Sachin
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
| | - Upendra Sharma
- C-H Activation & Phytochemistry Lab, Chemical Technology Division, CSIR-IHBT, Palampur 176061, India
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-201002, India
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3
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Gallego-Gamo A, Sarró P, Ji Y, Pleixats R, Molins E, Gimbert-Suriñach C, Vallribera A, Granados A. Direct Synthesis of 2-Hydroxytrifluoroethylacetophenones via Organophotoredox-Mediated Net-Neutral Radical/Polar Crossover. J Org Chem 2024; 89:11682-11692. [PMID: 39087492 PMCID: PMC11334190 DOI: 10.1021/acs.joc.4c01419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2024] [Revised: 07/19/2024] [Accepted: 07/22/2024] [Indexed: 08/02/2024]
Abstract
Alkene difunctionalization is a very attractive tool in synthetic organic chemistry. Herein, we disclose an operationally and practically simple method to access 2-hydroxytrifluoroethylacetophenones from styrene derivatives via photoredox catalysis. This light-mediated transformation promotes the generation of the 1-hydroxy-2,2,2-trifluoroethyl carbon-centered radical as key synthon, which undergoes Giese addition with styrenes followed by a Kornblum oxidation process. The presented method is not only mild and cost-effective, but also utilizes an organic photocatalyst and DMSO as oxidant. Experimental investigations support the operative mechanism via net-neutral radical/polar crossover.
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Affiliation(s)
- Albert Gallego-Gamo
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Pau Sarró
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Yingmin Ji
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Roser Pleixats
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Elies Molins
- Institut
de Ciència de Materials de Barcelona (ICMAB-CSIC), Campus UAB, 08193 Bellaterra, Spain
| | - Carolina Gimbert-Suriñach
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Adelina Vallribera
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
| | - Albert Granados
- Department
of Chemistry and Centro de Innovación en Química Avanzada
(ORFEO−CINQA), Universitat Autònoma
de Barcelona, Cerdanyola del Vallès, 08193 Barcelona, Spain
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4
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Gao X, Liao J, Wei H, Xu Y, Zhai R, Kong D, Wang S, Chen X. TEMPO-Mediated Dehydrogenative Hydroxyfluoroalkylation of Arylamines with Polyfluorinated Alcohols. J Org Chem 2024; 89:6169-6179. [PMID: 38654590 DOI: 10.1021/acs.joc.4c00185] [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
An efficient 2,2,6,6-tetramethylpiperidinooxy (TEMPO)-mediated hydroxyfluoroalkylation of arylamines with polyfluorinated alcohols via a radical-triggered C(sp2)-H/C(sp3)-H dehydrogenative cross-coupling process was developed. This transformation features simple operation, high atom economy, broad substrate compatibility, and excellent regioselectivity, leading to a series of hydroxyfluoroalkylated arylamine derivatives. Importantly, these synthetic products were further used to evaluate the antitumor activity in cancer cell lines by Cell Counting Kit-8 assay and the outcomes indicated that some compounds show a potent antiproliferative effect.
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Affiliation(s)
- Xiaoyang Gao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Juting Liao
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Hengyi Wei
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Ye Xu
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Ruirui Zhai
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Dulin Kong
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Shuojin Wang
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
| | - Xun Chen
- Key Laboratory of Tropical Translational Medicine of Ministry of Education, Hainan Provincial Key Laboratory for Research and Development of Tropical Herbs, School of Pharmacy, Hainan Medical University, Haikou 571199, China
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5
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Qi M, Xu AW. A visible-light-induced photosensitizer-free decarbonylative Minisci-type reaction. Org Biomol Chem 2024; 22:2654-2661. [PMID: 38470359 DOI: 10.1039/d4ob00021h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/13/2024]
Abstract
This study presents a green and practical visible-light-induced photosensitizer-free decarbonylative Minisci-type reaction using aldehydes as alkyl radical precursors. The photocatalytic system exhibits a broad substrate scope and synthetically useful yields. Mechanistic experiments revealed that alkyl radicals could be generated through auto-oxidation of aldehydes under irradiation, which is a mild and effective method for achieving late-stage functionalization of N-heteroarenes. Some biologically active N-heteroarenes could be alkylated using this photocatalytic system smoothly.
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Affiliation(s)
- Ming Qi
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
| | - An-Wu Xu
- Division of Nanomaterials and Chemistry, Hefei National Research Center for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, 230026, People's Republic of China.
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6
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Zhang QL, Sun B, Ji G, Zhang G, Zhang FL. An Expanded EDA Complex Profile: Construction of Aza-arenes and Their Synthetic Application as Fluorescence Probes. Org Lett 2024; 26:110-115. [PMID: 38157221 DOI: 10.1021/acs.orglett.3c03720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2024]
Abstract
We developed a visible-light-driven expanded EDA complex profile for the synthesis of aza-arenes via aza-6π electrocyclization of 2-styrylanilines with aromatic aldehydes. This protocol relies on the EDA complexes of AlCl3 with imine to induce the absorption red-shift to visible light from ultraviolet light. An array of 2,3-disubstituted quinolines were constructed smoothly after excitation with blue-light-emitting diodes at room temperature. In addition, the resultant product, used as a cell permeable lipid droplet-specific probe, shows a low working concentration, a short staining time, and functionality in living and fixed cells.
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Affiliation(s)
- Qun-Liang Zhang
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Bing Sun
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Guanchang Ji
- Department of Urology, The Second Affiliated Hospital of Zhengzhou University, No. 2 Jingba Road, Jinshui District, Zhengzhou 450003, P. R. China
| | - Guizhen Zhang
- Department of Infectious Diseases, The First Affiliated Hospital of Zhengzhou University, No. 1 Jianshe East Road, Zhengzhou 450052, P. R. China
| | - Fang-Lin Zhang
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, P. R. China
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7
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Gallego-Gamo A, Pleixats R, Gimbert-Suriñach C, Vallribera A, Granados A. Hydroxytrifluoroethylation and Trifluoroacetylation Reactions via SET Processes. Chemistry 2024:e202303854. [PMID: 38183331 DOI: 10.1002/chem.202303854] [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: 11/20/2023] [Revised: 01/04/2024] [Accepted: 01/05/2024] [Indexed: 01/08/2024]
Abstract
Hydroxytrifluoroethyl and trifluoroacetyl groups are of utmost importance in biologically active compounds, but methods to tether these motifs to organic architectures have been limited. Typically, the preparation of these compounds relied on the use of strong bases or multistep routes. The renaissance of radical chemistry in photocatalytic, transition metal mediated, and hydrogen atom transfer (HAT) processes have allowed the installation of these medicinally relevant fluorinated motifs. This review provides an overview of the methods available for the direct synthesis of hydroxytrifluoroethyl- and trifluoroacetyl-derived compounds governed by single-electron transfer processes.
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Affiliation(s)
- Albert Gallego-Gamo
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Roser Pleixats
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Carolina Gimbert-Suriñach
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Adelina Vallribera
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
| | - Albert Granados
- Department of Chemistry and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Universitat Autònoma de Barcelona, Cerdanyola del Vallès, 08193, Barcelona, Spain
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