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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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2
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Du HW, Du YD, Zeng XW, Shu W. Access to Trifluoromethylketones from Alkyl Bromides and Trifluoroacetic Anhydride by Photocatalysis. Angew Chem Int Ed Engl 2023; 62:e202308732. [PMID: 37534823 DOI: 10.1002/anie.202308732] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/02/2023] [Accepted: 08/03/2023] [Indexed: 08/04/2023]
Abstract
Aliphatic trifluoromethyl ketones are a type of unique fluorine-containing subunit which play a significant role in altering the physical and biological properties of molecules. Catalytic methods to provide direct access to aliphatic trifluoromethyl ketones are highly desirable yet remain underdeveloped, partially owing to the high reactivity and instability of trifluoroacetyl radical. Herein, we report a photocatalytic synthesis of trifluoromethyl ketones from alkyl bromides with trifluoroacetic anhydride. The reaction features dual visible-light and halogen-atom-transfer catalysis, followed by an enabling radical-radical cross-coupling of an alkyl radical with a stabilized trifluoromethyl radical. The reaction provides straightforward access to aliphatic trifluoromethyl ketones from readily available and cost-effective alkyl halides and trifluoroacetic anhydride (TFAA).
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Affiliation(s)
- Hai-Wu Du
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Yi-Dan Du
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Xian-Wang Zeng
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
| | - Wei Shu
- Shenzhen Grubbs Institute and Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, P. R. China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, 300071, Tianjin, P. R. China
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3
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Popov AV, Kobelevskaya VA, Borodin NI, Zinchenko SV. α,β-Unsaturated CF3-ketones via secondary amine salts-catalyzed aldol condensation of 1,1,1-trufluoroacetone with aromatic and heteroaromatic aldehydes. J Fluor Chem 2023. [DOI: 10.1016/j.jfluchem.2023.110108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023]
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4
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Copper complexes bearing tridentate salicylaldimine Schiff-base ligands: Synthesis, characterizations and catalytic performance in the oxidation reaction of alcohols. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115869] [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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5
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Zhu G, Shi S, Feng X, Zhao L, Cao J, Wang Y, Sun Z, Gao J, Xu J. Aerobic Selective Oxidation of Cyclohexylbenzene Over Organocatalysis with Pairs of Nitrogenous Hydroxyl Precursors and Anthraquinones. Catal Letters 2022. [DOI: 10.1007/s10562-022-04076-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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6
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Liu X, Liu L, Huang T, Zhang J, Tang Z, Li C, Chen T. Trifluoromethylation of Benzoic Acids: An Access to Aryl Trifluoromethyl Ketones. Org Lett 2021; 23:4930-4934. [PMID: 34109800 DOI: 10.1021/acs.orglett.1c01720] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The trifluoromethylation of benzoic acids with TMSCF3 was achieved through nucleophilic substitution with the use of anhydrides as an in situ activating reagent. Under the reaction conditions, a wide range of carboxylic acids including the bioactive ones worked well, thus providing a facile and efficient method for preparing aryl trifluoromethyl ketones from the readily available starting materials.
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Affiliation(s)
- Xue Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Long Liu
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Tianzeng Huang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Jingjing Zhang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Zhi Tang
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Chunya Li
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
| | - Tieqiao Chen
- Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan Provincial Key Lab of Fine Chem, Hainan Provincial Fine Chemical Engineering Research Center, Hainan University, Haikou 570228, China
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7
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Kirihara M, Suzuki K, Nakakura K, Saito K, Nakamura R, Tujimoto K, Sakamoto Y, Kikkawa Y, Shimazu H, Kimura Y. Oxidation of fluoroalkyl alcohols using sodium hypochlorite pentahydrate [1]. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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8
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Fujihira Y, Liang Y, Ono M, Hirano K, Kagawa T, Shibata N. Synthesis of trifluoromethyl ketones by nucleophilic trifluoromethylation of esters under a fluoroform/KHMDS/triglyme system. Beilstein J Org Chem 2021; 17:431-438. [PMID: 33633811 PMCID: PMC7884878 DOI: 10.3762/bjoc.17.39] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 02/02/2021] [Indexed: 12/29/2022] Open
Abstract
A straightforward method that enables the formation of biologically attractive trifluoromethyl ketones from readily available methyl esters using the potent greenhouse gas fluoroform (HCF3, HFC-23) was developed. The combination of fluoroform and KHMDS in triglyme at −40 °C was effective for this transformation, with good yields as high as 92%. Substrate scope of the trifluoromethylation procedure was explored for aromatic, aliphatic, and conjugated methyl esters. This study presents a straightforward trifluoromethylation process of various methyl esters that convert well to the corresponding trifluoromethyl ketones. The tolerance of various pharmacophores under the reaction conditions was also explored.
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Affiliation(s)
- Yamato Fujihira
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Yumeng Liang
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Makoto Ono
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Kazuki Hirano
- Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan
| | - Takumi Kagawa
- Tosoh Finechem Corporation, 4988, Kaiseicho, Shunan, 746-0006, Japan
| | - Norio Shibata
- Department of Life Science and Applied Chemistry, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan.,Department of Nanopharmaceutical Sciences, Nagoya Institute of Technology, Gokiso, Showa-ku, Nagoya 466-5888, Japan.,Institute of Advanced Fluorine-Containing Materials, Zhejiang Normal University, 688 Yingbin Avenue, 321004 Jinhua, China
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9
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Muzalevskiy VM, Sizova ZA, Panyushkin VV, Chertkov VA, Khrustalev VN, Nenajdenko VG. α,β-Disubstituted CF 3-Enones as a Trifluoromethyl Building Block: Regioselective Preparation of Totally Substituted 3-CF 3-Pyrazoles. J Org Chem 2021; 86:2385-2405. [PMID: 33423495 DOI: 10.1021/acs.joc.0c02516] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
An efficient pathway toward a novel class of trifluoromethyl building blocks was elaborated. The reaction of α-CF3-enamines with arylaldehydes resulted in direct synthesis of α,β-diaryl-CF3-enones isolated in up to 93% yield as E-isomers. The possible reaction mechanism was proposed using the Zimmerman-Traxler model. The reaction of α,β-diaryl-CF3-enones with hydrazines opens a novel pathway to trifluoromethylated pyrazolines. Oxidation of pyrazolines with DDQ opened access to totally regioselective preparation of 3-CF3-pyrazoles isolated in high yield. Using this strategy, 4-arylated derivatives of known drugs Celebrex, Mavacoxib, and SC-560 can be synthesized.
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Affiliation(s)
- Vasiliy M Muzalevskiy
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Zoia A Sizova
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vasiliy V Panyushkin
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Vyacheslav A Chertkov
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
| | - Victor N Khrustalev
- Peoples' Friendship University of Russia, Moscow 117198, Russia.,N. D. Zelinsky Institute of Organic Chemistry of RAS, 47 Leninsky Prospect, Moscow 119991, Russia
| | - Valentine G Nenajdenko
- Department of Chemistry, M. V. Lomonosov Moscow State University, Leninskie Gory 1, Moscow 119991, Russia
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10
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Hashimoto M, Hashinoki M, Kurokawa N, Murai Y, Puteri Tachrim Z, Sakihama Y, Suzuki T. Synthesis of (Trifluoromethyldiazirinyl)phenylboronic Acid Derivatives for Photoaffinity Labeling. HETEROCYCLES 2021. [DOI: 10.3987/com-20-s(k)23] [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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Trinuclear ruthenium carbonyl complexes with salicylaldimine ligands as efficient catalysts for the oxidation of secondary alcohols. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2020.121647] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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12
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3-BocNH-ABNO-catalyzed aerobic oxidation of alcohol at room temperature and atmospheric pressure. Tetrahedron Lett 2019. [DOI: 10.1016/j.tetlet.2019.150994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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13
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Sterckx H, Morel B, Maes BUW. Catalytic Aerobic Oxidation of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2019; 58:7946-7970. [PMID: 30052305 DOI: 10.1002/anie.201804946] [Citation(s) in RCA: 144] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2018] [Indexed: 01/04/2023]
Abstract
Oxidation reactions are a key technology to transform hydrocarbons from petroleum feedstock into chemicals of a higher oxidation state, allowing further chemical transformations. These bulk-scale oxidation processes usually employ molecular oxygen as the terminal oxidant as at this scale it is typically the only economically viable oxidant. The produced commodity chemicals possess limited functionality and usually show a high degree of symmetry thereby avoiding selectivity issues. In sharp contrast, in the production of fine chemicals preference is still given to classical oxidants. Considering the strive for greener production processes, the use of O2 , the most abundant and greenest oxidant, is a logical choice. Given the rich functionality and complexity of fine chemicals, achieving regio/chemoselectivity is a major challenge. This review presents an overview of the most important catalytic systems recently described for aerobic oxidation, and the current insight in their reaction mechanism.
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Affiliation(s)
- Hans Sterckx
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bénédicte Morel
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
| | - Bert U W Maes
- Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerp, Belgium
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14
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Sterckx H, Morel B, Maes BUW. Katalytische, aerobe Oxidation von C(sp
3
)‐H‐Bindungen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201804946] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Hans Sterckx
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
| | - Bénédicte Morel
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
| | - Bert U. W. Maes
- Department of Chemistry University of Antwerp Groenenborgerlaan 171 B-2020 Antwerpen Belgien
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15
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Niu P, Liu X, Shen Z, Li M. Electrochemical Performance of ABNO for Oxidation of Secondary Alcohols in Acetonitrile Solution. Molecules 2018; 24:E100. [PMID: 30597882 PMCID: PMC6337132 DOI: 10.3390/molecules24010100] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Revised: 12/23/2018] [Accepted: 12/27/2018] [Indexed: 11/16/2022] Open
Abstract
The ketones was successfully prepared from secondary alcohols using 9-azabicyclo[3.3.1]nonane-N-oxyl (ABNO) as the catalyst and 2,6-lutidine as the base in acetonitrile solution. The electrochemical activity of ABNO for oxidation of 1-phenylethanol was investigated by cyclic voltammetry, in situ Fourier transform infrared spectroscopy (FTIR) and constant current electrolysis experiments. The resulting cyclic voltammetry indicated that ABNO exhibited much higher electrochemical activity when compared with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) under the similar conditions. A reasonable reaction mechanism of the electrocatalytic oxidation of 1-phenylethanol to acetophenone was proposed. In addition, a series of secondary alcohols could be converted to the corresponding ketones at room temperature in 80⁻95% isolated yields.
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Affiliation(s)
- Pengfei Niu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Xin Liu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Zhenlu Shen
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Meichao Li
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
- Research Center of Analysis and Measurement, Zhejiang University of Technology, Hangzhou 310032, China.
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16
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Hao Z, Li Y, Li C, Wu R, Ma Z, Li S, Han Z, Zheng X, Lin J. Synthesis of a series of new ruthenium organometallic complexes derived from pyridine-imine ligands and their catalytic activity in oxidation of secondary alcohols. Appl Organomet Chem 2018. [DOI: 10.1002/aoc.4750] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Zhiqiang Hao
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Ying Li
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Chen Li
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Ruitao Wu
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Zhihong Ma
- School of Pharmacy; Hebei Medical University; Shijiazhuang 050017 China
| | - Suzhen Li
- Hebei College of Industry and Technology; Shijiazhuang 050091 China
| | - Zhangang Han
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Xuezhong Zheng
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
| | - Jin Lin
- National Demonstration Center for Experimental Chemistry Education, College of Chemistry & Material Science; Hebei Normal University; Shijiazhuang 050024 China
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17
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Zhang P, Shen H, Zhu L, Cao W, Li C. Radical C(sp2)–H Trifluoromethylation of Aldehydes in Aqueous Solution. Org Lett 2018; 20:7062-7065. [DOI: 10.1021/acs.orglett.8b03012] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pei Zhang
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Haigen Shen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Lin Zhu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Weiguo Cao
- Department of Chemistry, Shanghai University, 99 Shangda Road, Shanghai 200444, China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- School of Materials and Chemical Engineering, Ningbo University of Technology, No. 201 Fenghua Road, Ningbo 315211, China
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18
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Efficient aerobic oxidation of alcohols to aldehydes and ketones using a ruthenium carbonyl complex of a tert-butyl-substituted tetramethylcyclopentadienyl ligand as catalyst. TRANSIT METAL CHEM 2018. [DOI: 10.1007/s11243-018-0251-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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19
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Matsukawa Y, Hirashita T, Araki S. Nitrosotetrazolium-Catalyzed Aerobic Oxidation of Alcohols to the Corresponding Carbonyl Compounds. European J Org Chem 2018. [DOI: 10.1002/ejoc.201701662] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Yuta Matsukawa
- Life Science and Applied Chemistry; Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku 466-8555 Nagoya Aichi Japan
| | - Tsunehisa Hirashita
- Life Science and Applied Chemistry; Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku 466-8555 Nagoya Aichi Japan
| | - Shuki Araki
- Life Science and Applied Chemistry; Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku 466-8555 Nagoya Aichi Japan
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20
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Funabiki K, Hayakawa A, Inuzuka T. Convenient, functional group-tolerant, transition metal-free synthesis of aryl and heteroaryl trifluoromethyl ketones with the use of methyl trifluoroacetate. Org Biomol Chem 2018; 16:913-918. [DOI: 10.1039/c7ob02862h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new convenient, functional group-tolerant, transition metal-free route to aryl trifluoromethyl ketones under mild conditions is described.
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Affiliation(s)
- Kazumasa Funabiki
- Department of Chemistry and Biomolecular Science
- Gifu University
- Gifu 501-1193
- Japan
| | - Ayaka Hayakawa
- Department of Chemistry and Biomolecular Science
- Gifu University
- Gifu 501-1193
- Japan
| | - Toshiyasu Inuzuka
- Division of Instrumental Analysis
- Life Science Research Center
- Gifu University
- Gifu 501-1193
- Japan
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21
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Pistritto VA, Paolillo JM, Bisset KA, Leadbeater NE. Oxidation of α-trifluoromethyl and non-fluorinated alcoholsviathe merger of oxoammonium cations and photoredox catalysis. Org Biomol Chem 2018; 16:4715-4719. [DOI: 10.1039/c8ob01063c] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The merger of oxoammonium cation mediated oxidation with visible-light photoredox catalysis is demonstrated in the oxidation of α-trifluoromethyl and non-fluorinated alcohols.
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22
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Kadoh Y, Oisaki K, Kanai M. Enhanced Structural Variety of Nonplanar N-Oxyl Radical Catalysts and Their Application to the Aerobic Oxidation of Benzylic C-H Bonds. Chem Pharm Bull (Tokyo) 2017; 64:737-53. [PMID: 27373629 DOI: 10.1248/cpb.c16-00083] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The design and synthesis of structurally variable, nonplanar N-oxyl radical catalysts and their application to the aerobic oxidation, etherification, and acetoamidation of benzylic C-H bonds are described. The catalytic oxidation of C-H bonds represents a powerful tool to synthesize oxygenated functional molecules from simple hydrocarbons in a straightforward way. Electron-deficient N-oxyl radical catalysts, such as phthalimidoyl N-oxyl (PINO) radical, generated from N-hydroxyphthalimide (1), have attracted much attention because of their applications in the oxidation of C-H bonds with high bond dissociation energy (BDE). However, a few sites in 1 are available for structural modifications and improvements of the catalytic performance. By replacing one carbonyl group in 1 with a trifluoromethyl (CF3)-substituted sp(3)-carbon, we generated an additional tunable site and a nonplanar backbone, while retaining the desirable electron-withdrawing properties and increasing the lipophilicity with respect to 1. We synthesized a variety of N-hydroxy precatalysts containing such a CF3 moiety, and investigated their utility in the aerobic oxidation of benzylic C-H bonds. Precatalysts with electron-withdrawing substituents, such as trifluoroethoxy and the acetophenone moieties, afforded higher yields than a corresponding methoxy-substituted analogue. The introduction of substituents at the aromatic ring was also effective, as evident from the performance of 7-CF3 and 4,5,6,7-tetrafluoro precatalysts. Especially the combination of trifluoroethoxy- and 4,5,6,7-tetrafluoro substitution afforded a superior performance. These catalyst systems exhibited high functional group tolerance during the aerobic oxidation of C-H bonds, and benzylic etherification and Ritter-type reactions could be carried out at room temperature when a selected precatalyst and N-bromosuccinimide (NBS) were used.
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Affiliation(s)
- Yoichi Kadoh
- Graduate School of Pharmaceutical Sciences, The University of Tokyo
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Hirashita T, Nakanishi M, Uchida T, Yamamoto M, Araki S, Arends IWCE, Sheldon RA. Ionic TEMPO in Ionic Liquids: Specific Promotion of the Aerobic Oxidation of Alcohols. ChemCatChem 2016. [DOI: 10.1002/cctc.201600491] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tsunehisa Hirashita
- Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Makoto Nakanishi
- Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Tomoya Uchida
- Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Masakazu Yamamoto
- Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Shuki Araki
- Graduate School of Engineering; Nagoya Institute of Technology; Gokiso-cho, Showa-ku Nagoya 466-8555 Japan
| | - Isabel W. C. E. Arends
- Biocatalysis and Organic Chemistry; Delft University of Technology; Julianalaan 136 2628 BL Delft The Netherlands
| | - Roger A. Sheldon
- Biocatalysis and Organic Chemistry; Delft University of Technology; Julianalaan 136 2628 BL Delft The Netherlands
- School of Chemistry; University of the Witwatersrand; Johannesburg 2050 Republic of South Africa
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24
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Zeng Y, Ni C, Hu J. Recent Advances in the One-Step Synthesis of Distally Fluorinated Ketones. Chemistry 2015; 22:3210-3223. [DOI: 10.1002/chem.201504036] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Indexed: 12/22/2022]
Affiliation(s)
- Yuwen Zeng
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Road Shanghai 200032 P. R. China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Road Shanghai 200032 P. R. China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Road Shanghai 200032 P. R. China
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