1
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Qi SL, Liu YP, Li Y, Luan YX, Ye M. Ni-catalyzed hydroarylation of alkynes with unactivated β-C(sp 2)-H bonds. Nat Commun 2022; 13:2938. [PMID: 35618702 PMCID: PMC9135730 DOI: 10.1038/s41467-022-30367-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 04/28/2022] [Indexed: 12/26/2022] Open
Abstract
Hydroarylation of alkynes with unactivated C(sp2)-H bonds via chelated C-H metalation mainly occurs at γ-position to the coordinating atom of directing groups via stable 5-membered metallacycles, while β-C(sp2)-H bond-involved hydroarylation has been a formidable challenge. Herein, we used a phosphine oxide-ligated Ni-Al bimetallic catalyst to enable β-C-H bond-involved hydroarylations of alkynes via a rare 7-membered nickelacycle.
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Affiliation(s)
- Shao-Long Qi
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yu-Peng Liu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yi Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Yu-Xin Luan
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Mengchun Ye
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Tianjin, 300071, China. .,Haihe Laboratory of Sustainable Chemical Transformations, Tianjin, 300192, China.
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2
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Synthesis, characterization and in vitro, in vivo, in silico biological evaluations of substituted benzimidazole derivatives. Saudi J Biol Sci 2022; 29:239-250. [PMID: 35002414 PMCID: PMC8717171 DOI: 10.1016/j.sjbs.2021.08.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 08/23/2021] [Accepted: 08/23/2021] [Indexed: 11/22/2022] Open
Abstract
A series of substituted benzimidazole derivatives were synthesized by reacting O-phenylenediamine with various aromatic aldehydes or glycolic acid using various inexpensive reagents in aqueous media. Synthesized compounds were characterized and elucidated by IR, 1H NMR, ESI-MS spectra. Resultant compounds were screened for in vitro antimicrobial, cytotoxic, antioxidant, lipid peroxidation and cholinesterase inhibitory activities, in vivo analgesic and anti-inflammatory, and in silico anti-acetylcholinesterase and anti-butyrylcholinesterase activities. Among the synthesized compounds, compound 3b showed most promising central analgesic effect (46.15%) compared to morphine (48.08%), whereas compounds 6, 3c and 3a showed significant peripheral analgesic activity at two different dose levels (25 mg/kg and 50 mg/kg). Compounds 3b and 3a at the dose of 100 mg/kg showed significant anti-inflammatory effects from the first hour and onward, whereas compounds 6 and 3b showed moderate cytotoxic activities. In addition, compound 3a showed significant antioxidant activity having IC50 value of 16.73 µg/ml compared to 14.44 µg/ml for the standard BHT. Compound 6, 3a and 3b exhibited mild to moderate cholinesterase inhibitory activity. In silico studies revealed that compound 3a and 3b might be suitable for cholinesterase inhibitory activity. A comprehensive computational and experimental data suggested compounds 3b and 3a as the best possible candidates for pharmacological activity. All the experimental data were statistically significant (p < 0.01 level).
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3
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Baishya G, Dutta NB. Recent Advances in Direct C−H Trifluoromethylation of N‐Heterocycles. ChemistrySelect 2021. [DOI: 10.1002/slct.202103407] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Gakul Baishya
- Chemical Sciences & Technology Division CSIR-North East Institute of Science and Technology Jorhat 785006 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
| | - Nibedita B. Dutta
- Chemical Sciences & Technology Division CSIR-North East Institute of Science and Technology Jorhat 785006 India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad 201002 India
- Rain Forest Research Institute Jorhat 785001 India
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4
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Kumar P, Nagtilak PJ, Kapur M. Transition metal-catalyzed C–H functionalizations of indoles. NEW J CHEM 2021. [DOI: 10.1039/d1nj01696b] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
This review summarises a wide range of transformations on the indole skeleton, including arylation, alkenylation, alkynylation, acylation, nitration, borylation, and amidation, using transition-metal catalyzed C–H functionalization as the key step.
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Affiliation(s)
- Pravin Kumar
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Prajyot Jayadev Nagtilak
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal 462066, MP, India
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5
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Pradhan S, De PB, Shah TA, Punniyamurthy T. Recent Advances in Metal‐catalyzed Alkylation, Alkenylation and Alkynylation of Indole/indoline Benzenoid Nucleus. Chem Asian J 2020; 15:4184-4198. [DOI: 10.1002/asia.202001159] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 11/05/2020] [Indexed: 12/13/2022]
Affiliation(s)
- Sourav Pradhan
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
| | - Pinaki Bhusan De
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
| | - Tariq A. Shah
- Department of Chemistry Indian Institute of Technology Guwahati Guwahati 781039 India
- Govt. Srinagar Women's College Zakura Srinagar 190006 India
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6
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Olvera‐Mancilla J, Aguilar‐Lugo C, Fernández‐Gijón CA, Palacios‐Alquisira J, Zolotukhin M, Alexandrova L. Processable
N
‐Substituted Polybenzimidazole; Direct Synthesis. ChemistrySelect 2020. [DOI: 10.1002/slct.202000434] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Jessica Olvera‐Mancilla
- Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
- Laboratorio de Fisicoquímica Macromolecular, Posgrado de la Facultad de QuímicaUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
| | - Carla Aguilar‐Lugo
- Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
| | - César Augusto Fernández‐Gijón
- Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
- Departamento de Química Inorgánica y Nuclear, Facultad de QuímicaUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
| | - Joaquín Palacios‐Alquisira
- Laboratorio de Fisicoquímica Macromolecular, Posgrado de la Facultad de QuímicaUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
| | - Mikhail Zolotukhin
- Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
| | - Larissa Alexandrova
- Instituto de Investigaciones en MaterialesUniversidad Nacional Autónoma de México, Circuito Exterior s/n, Ciudad Universitaria Ciudad de México 04510 México
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7
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Xie JJ, Wang ZQ, Jiang GF. Metal-free oxidative trifluoromethylation of indoles with CF 3SO 2Na on the C2 position. RSC Adv 2019; 9:35098-35101. [PMID: 35530675 PMCID: PMC9074110 DOI: 10.1039/c9ra07785e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Accepted: 10/15/2019] [Indexed: 11/21/2022] Open
Abstract
An efficient method of synthesizing 2-trifluoromethylindoles from indoles with easy-to-handle, cheap and low-toxic CF3SO2Na under metal-free conditions is described, which selectively introduces trifluoromethyl to indoles on the C2 position. The desired product can be obtained in 0.7 g yield. A radical intermediate may be involved in this transformation. An efficient method of synthesizing 2-trifluoromethylindoles from indoles with easy-to-handle, cheap and low-toxic CF3SO2Na under metal-free conditions is described, which selectively introduces trifluoromethyl to indoles on the C2 position.![]()
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Affiliation(s)
- Jiao-Jiao Xie
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Zhi-Qing Wang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
| | - Guo-Fang Jiang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, Hunan University Changsha 410082 P. R. China
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8
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Ye F, Berger F, Jia H, Ford J, Wortman A, Börgel J, Genicot C, Ritter T. Aryl Sulfonium Salts for Site-Selective Late-Stage Trifluoromethylation. Angew Chem Int Ed Engl 2019; 58:14615-14619. [PMID: 31389649 PMCID: PMC7754511 DOI: 10.1002/anie.201906672] [Citation(s) in RCA: 129] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 07/15/2019] [Indexed: 11/06/2022]
Abstract
Incorporation of the CF3 group into arenes has found increasing importance in drug discovery. Herein, we report the first photoredox-catalyzed cross-coupling of aryl thianthrenium salts with a copper-based trifluoromethyl reagent, which enables a site-selective late-stage trifluoromethylation of arenes. The reaction proceeds with broad functional group tolerance, even for complex small molecules on gram scale. The method was further extended to produce pentafluoroethylated derivatives.
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Affiliation(s)
- Fei Ye
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Florian Berger
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Hao Jia
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Joseph Ford
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Alan Wortman
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Jonas Börgel
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
| | - Christophe Genicot
- Global Chemistry, UCB Medicines, UCB Biopharma, Braine-L'Alleud, 1420, Belgium
| | - Tobias Ritter
- Department Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470, Mülheim an der Ruhr, Germany
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9
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Ye F, Berger F, Jia H, Ford J, Wortman A, Börgel J, Genicot C, Ritter T. Aryl Sulfonium Salts for Site‐Selective Late‐Stage Trifluoromethylation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201906672] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fei Ye
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Florian Berger
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Hao Jia
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Joseph Ford
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Alan Wortman
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Jonas Börgel
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
| | - Christophe Genicot
- Global Chemistry UCB Medicines UCB Biopharma Braine-L'Alleud 1420 Belgium
| | - Tobias Ritter
- Department Max-Planck-Institut für Kohlenforschung Kaiser-Wilhelm-Platz 1 45470 Mülheim an der Ruhr Germany
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10
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Chen H, Yang H, Li N, Xue X, He Z, Zeng Q. Palladium-Catalyzed C–N Cross-Coupling of NH-Heteroarenes and Quaternary Ammonium Salts via C–N Bond Cleavage. Org Process Res Dev 2019. [DOI: 10.1021/acs.oprd.9b00194] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Hongyi Chen
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Hongqin Yang
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Nutao Li
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Xinghua Xue
- College of Materials and Chemical Engineering, Hainan University, Haikou 570228, China
| | - Ze He
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Qingle Zeng
- State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, College of Materials, Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
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11
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Kawamura S, Sodeoka M. Fluoroalkylation Methods for Synthesizing Versatile Building Blocks. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2019. [DOI: 10.1246/bcsj.20190080] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shintaro Kawamura
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
| | - Mikiko Sodeoka
- RIKEN Center for Sustainable Resource Science, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
- Synthetic Organic Chemistry Laboratory, RIKEN Cluster for Pioneering Research, 2-1 Hirosawa, Wako, Saitama 351-0198, Japan
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12
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Murugan A, Babu VN, Polu A, Sabarinathan N, Bakthadoss M, Sharada DS. Regioselective C3-H Trifluoromethylation of 2 H-Indazole under Transition-Metal-Free Photoredox Catalysis. J Org Chem 2019; 84:7796-7803. [PMID: 31117559 DOI: 10.1021/acs.joc.9b00676] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Trifluoromethyl-substituted heteroarenes are biologically active compounds and useful building blocks. In this sequence, we have developed a visible-light-promoted regioselective C3-H trifluoromethylation of 2 H-indazole under metal-free conditions, which proceeds via a radical mechanism. The combination of photocatalysis and hypervalent iodine reagent provides a practical approach to a library of trifluoromethylated indazoles in 35-83% yields.
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Affiliation(s)
- Arumugavel Murugan
- Catalysis & Chemical Biology Laboratory, Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, 502285 Sangareddy , Telangana , India
| | - Venkata Nagarjuna Babu
- Catalysis & Chemical Biology Laboratory, Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, 502285 Sangareddy , Telangana , India
| | - Ashok Polu
- Catalysis & Chemical Biology Laboratory, Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, 502285 Sangareddy , Telangana , India
| | - Nagaraj Sabarinathan
- Catalysis & Chemical Biology Laboratory, Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, 502285 Sangareddy , Telangana , India
| | - Manickam Bakthadoss
- Department of Chemistry , Pondicherry University , Pondicherry 605014 , India
| | - Duddu S Sharada
- Catalysis & Chemical Biology Laboratory, Department of Chemistry , Indian Institute of Technology Hyderabad , Kandi, 502285 Sangareddy , Telangana , India
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13
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Borodkin GI, Shubin VG. Progress and prospects in the use of photocatalysis for the synthesis of organofluorine compounds. RUSSIAN CHEMICAL REVIEWS 2019. [DOI: 10.1070/rcr4833] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Data on the synthesis of fluorinated organic compounds by photocatalysis are systematically considered and analyzed. The attention is focused on the mechanisms of photocatalytic reactions and the selectivity problem.
The bibliography includes 173 references.
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14
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Li JF, Zhao RF, Zhou FQ, She MY, Zhang J, Yin B, Zhang SY, Li JL. Exploring the necessity of an acidic additive for Pd(ii)-catalyzed exclusive C4-fluoroalkylation of 3-acetylindole: a detailed DFT study on the mechanism and regioselectivity. Org Chem Front 2019. [DOI: 10.1039/c8qo01338a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The regioselectivity of Pd(ii)-catalyzed exclusive C4-fluoroalkylation of 3-acetylindole arises from the transfer of electron density from the substrate to the catalyst.
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Affiliation(s)
- Jin-Feng Li
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Ru-Fang Zhao
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Fu-Qiang Zhou
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Meng-Yao She
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Jun Zhang
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Bing Yin
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Sheng-Yong Zhang
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
| | - Jian-Li Li
- MOE Key Laboratory of Synthetic and Natural Functional Molecule Chemistry
- College of Chemistry and Materials Science
- Northwest University
- Xi'an 710069
- China
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15
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Haas CP, Roider T, Hoffmann RW, Tallarek U. Light as a reaction parameter – systematic wavelength screening in photochemical synthesis. REACT CHEM ENG 2019. [DOI: 10.1039/c9re00339h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Systematic wavelength screening with 16 LED arrays in a continuous-flow photoreactor revealed different reaction channels for the perfluoroalkylation of 2-methylindole, which were transferred into independent synthetic routes.
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Affiliation(s)
- Christian P. Haas
- Department of Chemistry
- Philipps-Universität Marburg
- 35032 Marburg
- Germany
| | - Thomas Roider
- Department of Chemistry
- Philipps-Universität Marburg
- 35032 Marburg
- Germany
| | | | - Ulrich Tallarek
- Department of Chemistry
- Philipps-Universität Marburg
- 35032 Marburg
- Germany
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16
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Zhao Y, Xia W. Photochemical C–H bond coupling for (hetero)aryl C(sp2)–C(sp3) bond construction. Org Biomol Chem 2019; 17:4951-4963. [DOI: 10.1039/c9ob00244h] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This review highlights the recent advances in photochemical (hetero)aryl C(sp2)–C(sp3) bond construction via C–H bond coupling such as (hetero)arylation of C(sp3)–H bonds and alkylation of (hetero)aryl C(sp2)–H bonds.
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Affiliation(s)
- Yating Zhao
- College of Chemical and Material Engineering
- Quzhou University
- China
- State Key Lab of Urban Water Resource and Environment
- School of Science
| | - Wujiong Xia
- State Key Lab of Urban Water Resource and Environment
- School of Science
- Harbin Institute of Technology (Shenzhen)
- Guangzhou
- China
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17
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Wang CS, Dixneuf PH, Soulé JF. Photoredox Catalysis for Building C-C Bonds from C(sp 2)-H Bonds. Chem Rev 2018; 118:7532-7585. [PMID: 30011194 DOI: 10.1021/acs.chemrev.8b00077] [Citation(s) in RCA: 492] [Impact Index Per Article: 82.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Transition metal-catalyzed C-H bond functionalizations have been the focus of intensive research over the last decades for the formation of C-C bonds from unfunctionalized arenes, heteroarenes, alkenes. These direct transformations provide new approaches in synthesis with high atom- and step-economy compared to the traditional catalytic cross-coupling reactions. However, such methods still suffer from several limitations including functional group tolerance and the lack of regioselectivity. In addition, they often require harsh reaction conditions and some of them need the use of strong oxidant, in a stoichiometric amount, avoiding these processes to be truly eco-friendly. The use of photoredox catalysis has contributed to a significant expansion of the scope of C(sp2)-H bond functionalizations which include the direct arylations, (perfluoro)alkylations, acylations, and even cyanations. Most of these transformations involve the photochemical induced generation of a radical followed by its regioselective addition to arenes, heteroarenes, or alkenes, leading to the building of a new C(sp2)-C bond. The use of photoredox catalysis plays crucial roles in these reactions promoting electron transfer, enabling the generation of radical species and single electron either oxidation or reduction. Such reactions operating at room temperature allow the building of C-C bonds with high chemo-, regio-, or stereoselectivity. This review surveys the formation of C(sp2)-C bonds initiated by photoredox catalysis which involves a C(sp2)-H bond functionalization step, describes the advantages compared to traditional C(sp2)-H bond functionalizations, and presents mechanistic insights into the role played by the photoredox catalysts.
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18
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Kalepu J, Gandeepan P, Ackermann L, Pilarski LT. C4-H indole functionalisation: precedent and prospects. Chem Sci 2018; 9:4203-4216. [PMID: 29780550 PMCID: PMC5944383 DOI: 10.1039/c7sc05336c] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2017] [Accepted: 04/19/2018] [Indexed: 12/22/2022] Open
Abstract
C4-decorated indoles feature in a plethora of bioactive and functional compounds of importance to natural product synthesis, material sciences, as well as crop protection and pharmaceutical industries. Traditionally, their syntheses largely involved harsh stoichiometric metalations and radical reactions. However, transition metal catalysed C-H activation has recently evolved into a powerful strategy for the late-stage diversification of indoles at the C4-H position. Modern photoredox, enzymatic and precious transition metal catalysis represent the key stimuli for developing challenging C-C and C-Het bond forming transformations under mild reaction conditions. Herein, we discuss the evolution and application of these methods for the step-economical transformations of otherwise inert C4-H bonds up to December 2017.
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Affiliation(s)
- Jagadeesh Kalepu
- Department of Chemistry - BMC , Uppsala University , Box 576 , 75-123 Uppsala , Sweden . ; https://www.pilarskigroup.org/
| | - Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Goettingen , Germany .
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Goettingen , Germany .
| | - Lukasz T Pilarski
- Department of Chemistry - BMC , Uppsala University , Box 576 , 75-123 Uppsala , Sweden . ; https://www.pilarskigroup.org/
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Functionalization of C(sp2)–H Bonds of Arenes and Heteroarenes Assisted by Photoredox Catalysts for the C–C Bond Formation. TOP ORGANOMETAL CHEM 2018. [DOI: 10.1007/3418_2018_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Liu X, Wu Z, Zhang Z, Liu P, Sun P. Synthesis of trifluoroalkyl or difluoroalkyl phenanthridine derivatives via cascade reaction using an intramolecular cyano group as a radical acceptor under photoredox catalysis. Org Biomol Chem 2018; 16:414-423. [DOI: 10.1039/c7ob02804k] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
In the presence of Ru(phen)3Cl2 or fac-Ir(ppy)3 under visible-light irradiation, the addition of fluorinated radicals to N-arylacrylamides followed by an intramolecular cyano group insertion cascade cyclization process produced the target compounds in moderate to good yields.
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Affiliation(s)
- Xu Liu
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
| | - Zhongjie Wu
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
| | - Zeguo Zhang
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
| | - Ping Liu
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
| | - Peipei Sun
- College of Chemistry and Materials Science
- Nanjing Normal University; Jiangsu Provincial Key Laboratory of Material Cycle Processes and Pollution Control; Jiangsu Collaborative Innovation Center of Biomedical Functional Materials
- Nanjing 210023
- China
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21
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Tran G, Confair D, Hesp KD, Mascitti V, Ellman JA. C2-Selective Branched Alkylation of Benzimidazoles by Rhodium(I)-Catalyzed C-H Activation. J Org Chem 2017; 82:9243-9252. [PMID: 28828857 DOI: 10.1021/acs.joc.7b01723] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Herein, we report a Rh(I)/bisphosphine/K3PO4 catalytic system allowing for the first time the selective branched C-H alkylation of benzimidazoles with Michael acceptors. Branched alkylation with N,N-dimethyl acrylamide was successfully applied to the alkylation of a broad range of benzimidazoles incorporating a variety of N-substituents and with both electron-rich and -poor functionality displayed at different sites of the arene. Moreover, the introduction of a quaternary carbon was achieved by alkylation with ethyl methacrylate. The method was also shown to be applicable to the C2-selective branched alkylation of azabenzimidazoles.
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Affiliation(s)
- Gaël Tran
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Danielle Confair
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520, United States
| | - Kevin D Hesp
- Medicinal Sciences, Pfizer, Inc. , Groton, Connecticut 06340, United States
| | - Vincent Mascitti
- Medicinal Sciences, Pfizer, Inc. , Groton, Connecticut 06340, United States
| | - Jonathan A Ellman
- Department of Chemistry, Yale University , 225 Prospect Street, New Haven, Connecticut 06520, United States
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22
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Vargas-Oviedo D, Charris-Molina A, Portilla J. Efficient Access to o
-Phenylendiamines and Their Use in the Synthesis of a 1,2-Dialkyl-5-trifluoromethylbenzimidazoles Library Under Microwave Conditions. ChemistrySelect 2017. [DOI: 10.1002/slct.201700623] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Diana Vargas-Oviedo
- Departamento de Química; Universidad de los Andes; Carrera 1 N° 18A-12 Bogotá Colombia
| | - Andrés Charris-Molina
- Departamento de Química; Universidad de los Andes; Carrera 1 N° 18A-12 Bogotá Colombia
| | - Jaime Portilla
- Departamento de Química; Universidad de los Andes; Carrera 1 N° 18A-12 Bogotá Colombia
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23
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Hong J, Huo L, Yang Y, Wang G, Zheng C. Copper-Promoted One-Pot Trifluoromethylation of Aromatic Amines with Togni′s Reagent. ChemistrySelect 2017. [DOI: 10.1002/slct.201700789] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jianquan Hong
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road, Wuxi Jiangsu 214122 People's Republic of China
| | - Lianguang Huo
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road, Wuxi Jiangsu 214122 People's Republic of China
| | - Yupeng Yang
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road, Wuxi Jiangsu 214122 People's Republic of China
| | - Guifu Wang
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road, Wuxi Jiangsu 214122 People's Republic of China
| | - Changge Zheng
- School of Chemical and Material Engineering; Jiangnan University; 1800 Lihu Road, Wuxi Jiangsu 214122 People's Republic of China
- College of Chemistry Engineering; Xinjiang Agricultural University; 311 Nongda East Road Urumqi, Xinjiang Uygur Autonomous Region 830052 People's Republic of China
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