1
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Lai J, Xiao X, Shao S, Wang S, Kan J, Su W. Photoinduced Transition-Metal and External Photosensitizer Free Benzylic Fluorination of Unactivated Alkylarenes. Chemistry 2024; 30:e202401669. [PMID: 38970448 DOI: 10.1002/chem.202401669] [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: 04/28/2024] [Revised: 06/20/2024] [Accepted: 07/05/2024] [Indexed: 07/08/2024]
Abstract
A green and efficient protocol for the direct monofluorination of unactivated alkylarenes under visible-light irradiation has been developed, without any extraneous transition-metal catalysts or photosensitizers. This method is compatible with a broad spectrum of functional groups, including carboxylic and alcoholic scaffolds, under mild reaction conditions. Gram-scale synthesis of a fluorine-containing pharmaceutical analogue was successfully executed, underscoring the strategy's reliability and practicality. Furthermore, mechanistic studies suggest that a single-electron transfer mechanism might be responsible for the generation of the benzylic radicals in initiation step.
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Affiliation(s)
- Jiawen Lai
- College of Chemistry & Materials Science, Fujian Normal University, 350007, Fuzhou Fujian, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
| | - Xuan Xiao
- College of Chemistry & Materials Science, Fujian Normal University, 350007, Fuzhou Fujian, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
| | - Shixing Shao
- College of Chemistry & Materials Science, Fujian Normal University, 350007, Fuzhou Fujian, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
| | - Shuping Wang
- College of Chemistry & Materials Science, Fujian Normal University, 350007, Fuzhou Fujian, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
| | - Jian Kan
- College of Chemistry & Materials Science, Fujian Normal University, 350007, Fuzhou Fujian, P. R. China
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
| | - Weiping Su
- State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 350002, Fuzhou Fujian, P. R. China
- Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, 350108, Fuzhou Fujian, P. R. China
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2
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Atkins AP, Dean AC, Lennox AJJ. Benzylic C(sp 3)-H fluorination. Beilstein J Org Chem 2024; 20:1527-1547. [PMID: 39015617 PMCID: PMC11250007 DOI: 10.3762/bjoc.20.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2024] [Accepted: 06/26/2024] [Indexed: 07/18/2024] Open
Abstract
The selective fluorination of C(sp3)-H bonds is an attractive target, particularly for pharmaceutical and agrochemical applications. Consequently, over recent years much attention has been focused on C(sp3)-H fluorination, and several methods that are selective for benzylic C-H bonds have been reported. These protocols operate via several distinct mechanistic pathways and involve a variety of fluorine sources with distinct reactivity profiles. This review aims to give context to these transformations and strategies, highlighting the different tactics to achieve fluorination of benzylic C-H bonds.
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Affiliation(s)
| | - Alice C Dean
- University of Bristol, School of Chemistry, Bristol, BS8 1TS, U.K.
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3
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Jesani MH, Schwarz M, Kim S, Evans FL, White A, Browning A, Abrams R, Clayden J. Selective Defluorination of Trifluoromethyl Substituents by Conformationally Induced Remote Substitution. Angew Chem Int Ed Engl 2024; 63:e202403477. [PMID: 38587304 DOI: 10.1002/anie.202403477] [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: 02/19/2024] [Revised: 03/28/2024] [Accepted: 04/02/2024] [Indexed: 04/09/2024]
Abstract
The selective reduction of an aromatic trifluoromethyl substituent to a difluoromethyl substituent may be achieved by base-promoted elimination to form a difluoro-p-quinomethide which is trapped by an intramolecular nucleophile. High yields are obtained when the nucleophilic trap entails the conformationally favoured cyclisation of an aminoisobutyric acid (Aib) derivative. The resulting cyclised difluoromethyl-substituted arylimidazolidinone products are readily converted to versatile difluoromethyl-substituted aldehydes by reduction and hydrolysis. Defluorination is successful on a range of benzenoid (both para and ortho CF3-substituted) and heterocyclic substrates. Double defluorination may likewise be achieved sequentially, or in a single step, from an Aib dipeptide derivative.
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Affiliation(s)
- Mehul H Jesani
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Maria Schwarz
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Shiwhu Kim
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Finlay L Evans
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Alexander White
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Alex Browning
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Roman Abrams
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
| | - Jonathan Clayden
- School of Chemistry, University of Bristol Cantock's Close, Bristol, BS8 1TS, UK
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4
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Mori K, Miyashita M, Mori S, Shibata N, Nakagawa Y. Quantitative structure-activity relationship of 2,6-dimethoxy -N-(3-(4-substituted phenyl)isoxazol-5-yl)benzamide for the inhibition of chitin synthesis. JOURNAL OF PESTICIDE SCIENCE 2024; 49:87-93. [PMID: 38882705 PMCID: PMC11176048 DOI: 10.1584/jpestics.d24-004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 03/17/2024] [Indexed: 06/18/2024]
Abstract
Previously, we found that 5-(2,6-dimethoxybenzoylamino)-3-phenylisoxazoles (IOXs) inhibit chitin synthesis in the cultured integument of Chilo suppressalis. In this study, IOXs with various substituents at the para-position of the 3-phenyl ring were synthesized, and the concentrations required to inhibit chitin synthesis to 50% (IC50) were determined for all compounds. The introduction of halogens-such as F, Cl, and Br-and small alkyls-such as Me, Et, Pr, and n-Bu-at the 3-phenyl ring slightly enhanced the activity. However, the activity decreased drastically with the introduction of NO2, CF3, and t-Bu. The quantitative analysis of the substituent effect at the 3-phenyl ring on chitin-synthesis inhibition using the Hansch-Fujita method showed that the hydrophobic substituent with the optimum value was favored for the activity, but the bulky substituent in terms of E s was detrimental to the activity.
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Affiliation(s)
- Kotaro Mori
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Masahiro Miyashita
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
| | - Soichirou Mori
- Department of Nanopharmaceutical Sciences, Graduate School of Engineering, Nagoya Institute of Technology
| | - Norio Shibata
- Department of Nanopharmaceutical Sciences, Graduate School of Engineering, Nagoya Institute of Technology
| | - Yoshiaki Nakagawa
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University
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5
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Shan YD, Wu SH, Wang YL, Wang C, Zhi SQ, Liu Y, Han X. Selective Oxidation of Cyclohexane to Cyclohexanol/Cyclohexanone by Surface Peroxo Species on Cu-Mesoporous TiO 2. Inorg Chem 2023; 62:4872-4882. [PMID: 36916853 DOI: 10.1021/acs.inorgchem.2c04196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/16/2023]
Abstract
Selective oxidation of cyclohexane to cyclohexanol/cyclohexanone (KA-oil) is an important chemical process, which is still constrained by low conversion and selectivity and high energy consumption. In this study, Cu-doped mesoporous TiO2 (Cu-MT) has been successfully synthesized via calcinating MIL-125(Ti) doped with copper acetylacetonate, which shows high reactivity in selective oxidation of cyclohexane to KA-oil by persulfate (PS) with the desirable cyclohexane conversion of 16.8% and a selectivity of 98.0% under mild conditions and the low ratio of PS/cyclohexane of 1:1. A series of characterizations and density functional theory calculations reveal that the doped Cu(I,II) on Cu-MT is the reactive site for non-radical activation of PS with the moderate elongation of the O-O bond in PS, which then abstracts 1H (1H+ + 1e-) from cyclohexane to form Cy• and eventually KA-oil. This study gives new insight on the importance of moderately activated PS in selective oxidation of C-H.
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Affiliation(s)
- Yu-Dong Shan
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Song-Hai Wu
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Yu-Le Wang
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Cong Wang
- Heibei Key Laboratory of Hazardous Chemicals Safety and Control Technology, School of Chemical and Environmental Engineering, North China Institute of Science and Technology, Langfang, Hebei 065201, China
| | - Shao-Qi Zhi
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
| | - Yong Liu
- School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, P.R. China
| | - Xu Han
- Tianjin Key Laboratory of Chemical Process Safety and Equipment Technology, School of Chemical Engineering and Technology, Tianjin University, Tianjin 300350, P.R. China
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6
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Stangier M, Scheremetjew A, Ackermann L. Chemo- and Site-Selective Electro-Oxidative Alkane Fluorination by C(sp 3 )-H Cleavage. Chemistry 2022; 28:e202201654. [PMID: 35844078 PMCID: PMC9804291 DOI: 10.1002/chem.202201654] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Indexed: 01/05/2023]
Abstract
Electrochemical fluorinations of C(sp3 )-H bonds with a nucleophilic fluoride source have been accomplished in a chemo- and site-selective fashion, avoiding the use of electrophilic F+ sources and stoichiometric oxidants. The introduced metal-free strategy exhibits high functional group tolerance, setting the stage for late-stage fluorinations of biorelevant motifs. The synthetic utility of the C(sp3 )-H fluorination was reflected by subsequent one-pot arylation of the generated benzylic fluorides.
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Affiliation(s)
- Maximilian Stangier
- Institut für Organische und Biomolekulare Chemie Wöhler Research Institute for Sustainable Chemistry (WISCh)Georg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Alexej Scheremetjew
- Institut für Organische und Biomolekulare Chemie Wöhler Research Institute for Sustainable Chemistry (WISCh)Georg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie Wöhler Research Institute for Sustainable Chemistry (WISCh)Georg-August-Universität GöttingenTammannstrasse 237077GöttingenGermany
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7
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Madani A, Anghileri L, Heydenreich M, Möller HM, Pieber B. Benzylic Fluorination Induced by a Charge-Transfer Complex with a Solvent-Dependent Selectivity Switch. Org Lett 2022; 24:5376-5380. [PMID: 35848228 PMCID: PMC9344467 DOI: 10.1021/acs.orglett.2c02050] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
![]()
We present a divergent strategy for the fluorination
of phenylacetic
acid derivatives that is induced by a charge-transfer complex between
Selectfluor and 4-(dimethylamino)pyridine. A comprehensive investigation
of the conditions revealed a critical role of the solvent on the reaction
outcome. In the presence of water, decarboxylative fluorination through
a single-electron oxidation is dominant. Non-aqueous conditions result
in the clean formation of α-fluoro-α-arylcarboxylic acids.
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Affiliation(s)
- Amiera Madani
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Lucia Anghileri
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany.,Department of Chemistry and Biochemistry, Freie Universität Berlin, Arnimallee 22, 14195 Berlin, Germany
| | - Matthias Heydenreich
- Institute of Chemistry/Analytical Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Heiko M Möller
- Institute of Chemistry/Analytical Chemistry, University of Potsdam, Karl-Liebknecht-Strasse 24-25, 14476 Potsdam, Germany
| | - Bartholomäus Pieber
- Department of Biomolecular Systems, Max-Planck-Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476 Potsdam, Germany
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8
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Li Q, Zhao CQ, Chen T, Han LB. Direct phosphorylation of benzylic C-H bonds under transition metal-free conditions forming sp 3C-P bonds. RSC Adv 2022; 12:18441-18444. [PMID: 35799919 PMCID: PMC9227801 DOI: 10.1039/d2ra02812c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2022] [Accepted: 06/16/2022] [Indexed: 12/16/2022] Open
Abstract
Direct phosphorylation of benzylic C-H bonds was achieved in a biphasic system under transition metal-free conditions. A selective radical/radical sp3C-H/P(O)-H cross coupling was proposed, and various substituted toluenes were applicable. The transformation provided a promising method for constructing sp3C-P bonds.
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Affiliation(s)
- Qiang Li
- College of Chemistry and Chemical Engineering, Liaocheng University No. 1, Hunan Road Liaocheng Shandong 252059 China
| | - Chang-Qiu Zhao
- College of Chemistry and Chemical Engineering, Liaocheng University No. 1, Hunan Road Liaocheng Shandong 252059 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
| | - Li-Biao Han
- 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
- Zhejiang Yanfan New Materials Co., Ltd. Shangyu Zhejiang Province 312369 China
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9
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Cai C, Zou D. Recent Progress in Benzylic C(sp 3)—H Functionalization of Toluene and Its Derivatives. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202201027] [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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10
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Zhang Y, Lai GW, Nie LJ, He Q, Lin MJ, Chi R, Lu DL, Fan X. Organocatalytic difluorobenzylation of 1,2-diketones via mild cleavage of carbon–carbon bonds. Org Chem Front 2022. [DOI: 10.1039/d1qo01645h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Difluoroacetophenones (DFAPs) are developed as a class of novel and practical reagents for organocatalytic difluorobenzylation reactions.
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Affiliation(s)
- Yong Zhang
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Guo-Wei Lai
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Long-Jun Nie
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Qifang He
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Mei-Juan Lin
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Rong Chi
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Dong-Liang Lu
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
| | - Xiaolin Fan
- Key Laboratory of Organo-Pharmaceutical Chemistry, Gannan Normal University, Ganzhou 341000, P. R. China
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11
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Guo C, Han X, Li X, Diao Z, Li X, Dong Y. Direct C−H Difluoroalkylation of Heteroarenes with Difluoroalkyl Carboxylic Acids. ASIAN J ORG CHEM 2021. [DOI: 10.1002/ajoc.202100663] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Chunfang Guo
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
- Shandong Vocational College of Light Industry Zhoucun Mishan Road Zibo 255300 P. R. China
| | - Xuliang Han
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
| | - Xiangye Li
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
| | - Zhengzhen Diao
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
| | - Xinjin Li
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
- Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 P. R. China
| | - Yunhui Dong
- School of Chemistry and Chemical Engineering Shandong University of Technology 266 West Xincun Road Zibo 255000 P. R. China
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12
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Adachi A, Aikawa K, Ishibashi Y, Nozaki K, Okazoe T. Bench-Stable Electrophilic Fluorinating Reagents for Highly Selective Mono- and Difluorination of Silyl Enol Ethers. Chemistry 2021; 27:11919-11925. [PMID: 34009678 DOI: 10.1002/chem.202101499] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Indexed: 11/10/2022]
Abstract
Efficient methods for the synthesis of fluorinated compounds have been intensively studied, recently. Development of practical fluorinating reagents is indispensable for this purpose. Herein, bench-stable electrophilic fluorinating reagents were synthesized as N-fluorobenzenesulfonimide (NFSI) substitutes. Reagents obtained by replacing one of the NFSI sulfonyl groups with an acyl group led to the highly selective monofluorination of silyl enol ethers with suppression of undesired overreaction, that is, difluorination. On the other hand, reagents bearing electron-withdrawing substituents at NFSI benzenesulfonyl groups efficiently facilitated the difluorination of silyl enol ethers under base-free conditions. Thus, both mono- and difluorinated target materials were prepared from the same substrate.
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Affiliation(s)
- Akiya Adachi
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Kohsuke Aikawa
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Yuichiro Ishibashi
- Yokohama Technical Center, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
| | - Kyoko Nozaki
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan
| | - Takashi Okazoe
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 2-11-16 Yayoi, Bunkyo-ku, Tokyo, 113-8656, Japan.,Yokohama Technical Center, AGC Inc., 1-1 Suehiro-cho, Tsurumi-ku, Yokohama, 230-0045, Japan
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13
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Aguilar Troyano FJ, Merkens K, Gómez‐Suárez A. Selectfluor® Radical Dication (TEDA
2+.
) – A Versatile Species in Modern Synthetic Organic Chemistry. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000196] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
| | - Kay Merkens
- Organic ChemistryBergische Universität Wuppertal Gaußstr. 20 42119 Wuppertal Germany
| | - Adrián Gómez‐Suárez
- Organic ChemistryBergische Universität Wuppertal Gaußstr. 20 42119 Wuppertal Germany
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14
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Huang W, Wan X, Shen Q. Cobalt-Catalyzed Asymmetric Cross-Coupling Reaction of Fluorinated Secondary Benzyl Bromides with Lithium Aryl Boronates/ZnBr 2. Org Lett 2020; 22:4327-4332. [PMID: 32432476 DOI: 10.1021/acs.orglett.0c01363] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cobalt-catalyzed asymmetric cross-coupling of α-bromo-α-fluorotoluene derivatives with a variety of aryl zincates derived from lithium aryl n-butyl pinacol boronates and ZnBr2 under mild reaction conditions was described. In addition to mild reaction conditions, another advantage includes the compatibility of various common functional groups such as fluoride, chloride, bromide, cyano, or ester groups. Furthermore, this protocol was successfully applied to the enantioselective synthesis of three fluorinated derivatives of biologically active compounds or drug molecules.
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Affiliation(s)
- Weichen Huang
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Xiaolong Wan
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Qilong Shen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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15
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Liu J, Zhang J, Li X, Wu C, Liu H, Liu H, Sun F, Li Y, Liu Y, Li X. Nickel‐Catalyzed 1,1‐Difluoroethylation of (Hetero)aryl Halides with 1,1‐Difluoroethyl Chloride (CH
3
CF
2
Cl). ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000004] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Jianchang Liu
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Jida Zhang
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Xiangye Li
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Chaolin Wu
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Hefu Liu
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Hui Liu
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Fenggang Sun
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Yueyun Li
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Yuying Liu
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Xinjin Li
- School of Chemistry and Chemical EngineeringShandong University of Technology 266 West Xincun Road Zibo 255000 China
- Key Laboratory of Organofluorine ChemistryShanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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16
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Kumar S, Padala K. The recent advances in K2S2O8-mediated cyclization/coupling reactions via an oxidative transformation. Chem Commun (Camb) 2020; 56:15101-15117. [DOI: 10.1039/d0cc06036d] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Recently the K2S2O8 mediated cyclization/coupling reactions to construct carbon–carbon/carbon–heteroatom bond via oxidative transformation is became much interesting in organic synthesis.
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Affiliation(s)
- Sumit Kumar
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore
- India
| | - Kishor Padala
- Department of Chemistry
- School of Advanced Science
- Vellore Institute of Technology
- Vellore
- India
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17
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Spencer ARA, Grainger R, Panigrahi A, Lepper TJ, Bentkowska K, Larrosa I. Transition metal-free cross-dehydrogenative arylation of unactivated benzylic C–H bonds. Chem Commun (Camb) 2020; 56:14479-14482. [DOI: 10.1039/d0cc06212j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The cross-dehydrogenative arylation of benzylic C–H bonds with arenes provides straightforward access to synthetically useful 1,1-diarylmethanes, from readily available starting materials.
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Affiliation(s)
- Andrew R. A. Spencer
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Rachel Grainger
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Adyasha Panigrahi
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Thomas J. Lepper
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Katarzyna Bentkowska
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
| | - Igor Larrosa
- Department of Chemistry
- School of Natural Sciences
- University of Manchester
- Manchester M13 9PL
- UK
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18
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Liu J, Zhang J, Wu C, Liu H, Liu H, Sun F, Li Y, Liu Y, Dong Y, Li X. 1,1-Difluoroethyl chloride (CH 3CF 2Cl), a novel difluoroalkylating reagent for 1,1-difluoroethylation of arylboronic acids. RSC Adv 2019; 9:28409-28413. [PMID: 35529618 PMCID: PMC9071211 DOI: 10.1039/c9ra06406k] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 09/03/2019] [Indexed: 01/15/2023] Open
Abstract
1,1-Difluoroethylated aromatics are of great importance in medicinal chemistry and related fields. 1,1-Difluoroethyl chloride (CH3CF2Cl), a cheap and abundant industrial raw material, is viewed as an ideal 1,1-difluoroethylating reagent, but the direct introduction of the difluoroethyl (CF2CH3) group onto aromatic rings using CH3CF2Cl has not been successfully accomplished. Herein, we disclose a nickel-catalyzed 1,1-difluoroethylation of arylboronic acids with CH3CF2Cl for the synthesis of (1,1-difluoroethyl)arenes. 1,1-Difluoroethylated aromatics are of great importance in medicinal chemistry and related fields.![]()
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Affiliation(s)
- Jianchang Liu
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Jida Zhang
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Chaolin Wu
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Hefu Liu
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Hui Liu
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Fenggang Sun
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Yueyun Li
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Yuying Liu
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Yunhui Dong
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China
| | - Xinjin Li
- College of Chemistry and Chemical Engineering, Shandong University of Technology 266 West Xincun Road Zibo 255000 China .,Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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19
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Luo C, Bandar JS. Selective Defluoroallylation of Trifluoromethylarenes. J Am Chem Soc 2019; 141:14120-14125. [DOI: 10.1021/jacs.9b07766] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chaosheng Luo
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
| | - Jeffrey S. Bandar
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523, United States
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20
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Szpera R, Moseley DFJ, Smith LB, Sterling AJ, Gouverneur V. Fluorierung von C‐H‐Bindungen: Entwicklungen und Perspektiven. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814457] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Robert Szpera
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Daniel F. J. Moseley
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Lewis B. Smith
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Alistair J. Sterling
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
| | - Véronique Gouverneur
- Chemistry Research Laboratory Oxford University 12 Mansfield Road Oxford OX1 3TA Großbritannien
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21
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Szpera R, Moseley DFJ, Smith LB, Sterling AJ, Gouverneur V. The Fluorination of C-H Bonds: Developments and Perspectives. Angew Chem Int Ed Engl 2019; 58:14824-14848. [PMID: 30759327 DOI: 10.1002/anie.201814457] [Citation(s) in RCA: 246] [Impact Index Per Article: 49.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Indexed: 12/16/2022]
Abstract
This Review summarizes advances in fluorination by C(sp2 )-H and C(sp3 )-H activation. Transition-metal-catalyzed approaches championed by palladium have allowed the installation of a fluorine substituent at C(sp2 ) and C(sp3 ) sites, exploiting the reactivity of high-oxidation-state transition-metal fluoride complexes combined with the use of directing groups (some transient) to control site and stereoselectivity. The large majority of known methods employ electrophilic fluorination reagents, but methods combining a nucleophilic fluoride source with an oxidant have appeared. External ligands have proven to be effective for C(sp3 )-H fluorination directed by weakly coordinating auxiliaries, thereby enabling control over reactivity. Methods relying on the formation of radical intermediates are complementary to transition-metal-catalyzed processes as they allow for undirected C(sp3 )-H fluorination. To date, radical C-H fluorinations mainly employ electrophilic N-F fluorination reagents but a unique MnIII -catalyzed oxidative C-H fluorination using fluoride has been developed. Overall, the field of late-stage nucleophilic C-H fluorination has progressed much more slowly, a state of play explaining why C-H 18 F-fluorination is still in its infancy.
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Affiliation(s)
- Robert Szpera
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Daniel F J Moseley
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Lewis B Smith
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Alistair J Sterling
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Véronique Gouverneur
- Chemistry Research Laboratory, Oxford University, 12 Mansfield Road, Oxford, OX1 3TA, UK
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22
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23
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Xu WX, Dai XQ, Weng JQ. K 2S 2O 8-Mediated Hydroxyalkylation of Benzothiazoles with Alcohols in Aqueous Solution. ACS OMEGA 2019; 4:11285-11292. [PMID: 31460231 PMCID: PMC6648524 DOI: 10.1021/acsomega.9b01695] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Accepted: 06/18/2019] [Indexed: 06/10/2023]
Abstract
The K2S2O8-mediated hydroxyalkylation of 2H-benzothiazoles with aliphatic alcohols in aqueous solution was described. The mild and convenient protocol generated a series of hydroxyalkylated benzothiazoles in moderate to good yields. Besides, benzimidazole and ethers were also compatible in this reaction, leading to corresponding C2 ether-substituted heteroarenes.
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Affiliation(s)
- Wen-Xiu Xu
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Xiao-Qiang Dai
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
| | - Jian-Quan Weng
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou 310014, People’s Republic of China
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24
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Carbonnel E, Poisson T, Jubault P, Pannecoucke X, Besset T. Recent Advances for the Direct Introduction of the CF 2Me Moiety. Front Chem 2019; 7:111. [PMID: 30886846 PMCID: PMC6409352 DOI: 10.3389/fchem.2019.00111] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2019] [Accepted: 02/12/2019] [Indexed: 12/24/2022] Open
Abstract
Fluorine-containing molecules are compounds of interest in materials as well as in pharmaceutical and agrochemical industries. Therefore, developments in that research field are tremendous and a special focus was dedicated to the design and the study of emergent fluorinated groups. In particular, the CF2Me residue is attractive as it could be used for example as a bioisostere of the methoxy group. Despite the clear asset that represents this fluorinated moiety and in complement to the traditional approaches used to construct the CF2Me residue from existing functional groups, the quest for direct methodologies for the 1,1-difluoroethylation reaction of molecules has triggered a strong interest from the scientific community. This Mini-review will focus on the recent advances toward the design of reagents and their applications for the direct 1,1-difluoroethylation of various classes of compounds.
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Affiliation(s)
- Elodie Carbonnel
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen, France
| | - Thomas Poisson
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen, France
- Institut Universitaire de France, Paris, France
| | - Philippe Jubault
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen, France
| | - Xavier Pannecoucke
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen, France
| | - Tatiana Besset
- Normandie Univ, INSA Rouen, UNIROUEN, CNRS, COBRA (UMR 6014), Rouen, France
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25
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Lei J, Yang Y, Peng L, Wu L, Peng P, Qiu R, Chen Y, Au C, Yin S. Copper‐Catalyzed Oxidative C(sp3)−H/N−H Cross‐Coupling of Hydrocarbons with P(O)−NH Compounds: the Accelerating Effect Induced by Carboxylic Acid Coproduct. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201801694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Jian Lei
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Yincai Yang
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Lingteng Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Lesong Wu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Ping Peng
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Renhua Qiu
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
| | - Yi Chen
- School of MedicineHunan University of Chinese Medicine Changsha 410208 People's Republic of China
| | - Chak‐Tong Au
- College of Chemistry and Chemical EngineeringHunan Institute of Engineering Xiangtan 411104, Hunan People's Republic of China
| | - Shuang‐Feng Yin
- State Key Laboratory of Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, School of Materials Science and EngineeringHunan University Changsha 410082 People's Republic of China
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26
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Kerzig C, Guo X, Wenger OS. Unexpected Hydrated Electron Source for Preparative Visible-Light Driven Photoredox Catalysis. J Am Chem Soc 2019; 141:2122-2127. [PMID: 30672694 DOI: 10.1021/jacs.8b12223] [Citation(s) in RCA: 89] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The hydrated electron is experiencing a renaissance as a superreductant in lab-scale reductions driven by light, both for the degradation of recalcitrant pollutants and for challenging chemical reactions. However, examples for its sustainable generation under mild conditions are scarce. By combining a water-soluble Ir catalyst with unique photochemical properties and an inexpensive diode laser as light source, we produce hydrated electrons through a two-photon mechanism previously thought to be unimportant for laboratory applications. Adding cheap sacrificial donors turns our new hydrated electron source into a catalytic cycle operating in pure water over a wide pH range. Not only is that catalytic system capable of detoxifying a chlorinated model compound with turnover numbers of up to 200, but it can also be employed for two novel hydrated electron reactions, namely, the decomposition of quaternary ammonium compounds and the conversion of trifluoromethyl to difluoromethyl groups.
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Affiliation(s)
- Christoph Kerzig
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Xingwei Guo
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
| | - Oliver S Wenger
- Department of Chemistry , University of Basel , St. Johanns-Ring 19 , 4056 Basel , Switzerland
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27
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Zhu Y, He J, Niu Y, Han T, Zhu K. Rapid Microwave‐Assisted, Solvent‐Free Approach to Functionalization of 8‐Methylquinolines via Rh‐Catalyzed C(sp
3
)‐H Activation. ChemistrySelect 2019. [DOI: 10.1002/slct.201803833] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- You‐Quan Zhu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Jing‐Li He
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Yun‐Xia Niu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Ting‐Feng Han
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
| | - Kun Zhu
- State Key Laboratory of Elemento-Organic ChemistryCollege of ChemistryNankai University Tianjin 300071 China
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28
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Li X, Liu J, Li X, Liu H, Liu H, Li Y, Liu Y, Dong Y. Recent advance in the synthesis of (1,1-difluoroethyl)arenes. J Fluor Chem 2018. [DOI: 10.1016/j.jfluchem.2018.10.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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29
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Yang Q, Cabrera PJ, Li X, Sheng M, Wang NX. Safety Evaluation of the Copper-Mediated Cross-Coupling of 2-Bromopyridines with Ethyl Bromodifluoroacetate. Org Process Res Dev 2018. [DOI: 10.1021/acs.oprd.8b00261] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiang Yang
- Process Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Pablo J. Cabrera
- Process Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Xiaoyong Li
- Process Development, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
| | - Min Sheng
- Reactive Chemicals, Dow AgroSciences, Midland, Michigan 48667, United States
| | - Nick X. Wang
- Discovery Chemistry, Dow AgroSciences, 9330 Zionsville Road, Indianapolis, Indiana 46268, United States
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30
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Yang H, Wang F, Jiang X, Zhou Y, Xu X, Tang P. Silver-Promoted Oxidative Benzylic C-H Trifluoromethoxylation. Angew Chem Int Ed Engl 2018; 57:13266-13270. [PMID: 30085396 DOI: 10.1002/anie.201807144] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Revised: 07/20/2018] [Indexed: 11/08/2022]
Abstract
A silver-promoted oxidative benzylic C-H trifluoromethoxylation has been reported for the first time. With trifluoromethyl arylsulfonate as the trifluoromethoxylation reagent, various arenes, having diverse functional groups, undergo trifluoromethoxylation of their benzylic C-H bonds to form trifluoromethyl ethers under mild reaction conditions. In addition, the trifluoromethoxylation and the fluorination of methyl groups of electron-rich arenes have been achieved to prepare α-fluorobenzyl trifluoromethyl ethers in one step.
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Affiliation(s)
- Haodong Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Feng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
| | - Yu Zhou
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Xiufang Xu
- Department of Chemistry, Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin, 300071, China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin, 300071, China
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31
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Yang H, Wang F, Jiang X, Zhou Y, Xu X, Tang P. Silver‐Promoted Oxidative Benzylic C−H Trifluoromethoxylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807144] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Haodong Yang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Feng Wang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
| | - Yu Zhou
- Department of ChemistryKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)College of ChemistryNankai University Tianjin 300071 China
| | - Xiufang Xu
- Department of ChemistryKey Laboratory of Advanced Energy Materials Chemistry (Ministry of Education)College of ChemistryNankai University Tianjin 300071 China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic ChemistryCollege of ChemistryNankai UniversityCollaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300071 China
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32
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Meanwell M, Adluri BS, Yuan Z, Newton J, Prevost P, Nodwell MB, Friesen CM, Schaffer P, Martin RE, Britton R. Direct heterobenzylic fluorination, difluorination and trifluoromethylthiolation with dibenzenesulfonamide derivatives. Chem Sci 2018; 9:5608-5613. [PMID: 30061993 PMCID: PMC6050628 DOI: 10.1039/c8sc01221k] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2018] [Accepted: 05/25/2018] [Indexed: 12/14/2022] Open
Abstract
Functionalization of heterocyclic scaffolds with mono- or difluoroalkyl groups provides unique opportunities to modulate drug pKa, influence potency and membrane permeability, and attenuate metabolism. While advances in the addition of fluoroalkyl radicals to heterocycles have been made, direct C(sp3)-H heterobenzylic fluorination is comparatively unexplored. Here we demonstrate both mono- and difluorination of a range of alkyl heterocycles using a convenient process that relies on transient sulfonylation by the electrophilic fluorinating agent N-fluorobenzenesulfonimide. We also report heterobenzylic trifluoromethylthiolation and 18F-fluorination, providing a suite of reactions for late-stage C(sp3)-H functionalization of drug leads and radiotracer discovery.
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Affiliation(s)
- Michael Meanwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Bharani Shashank Adluri
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Zheliang Yuan
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Josiah Newton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Philippe Prevost
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Matthew B Nodwell
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
| | - Chadron M Friesen
- Department of Chemistry , Trinity Western University , Langley , British Columbia V2Y 1Y1 , Canada
| | - Paul Schaffer
- Life Science Division , TRIUMF , Vancouver , BC V6T 2A3 , Canada
| | - Rainer E Martin
- Medicinal Chemistry , Roche Pharma Research and Early Development (pRED) , Roche Innovation Center Basel , F. Hoffmann-La Roche Ltd , Grenzacherstrasse 124 , CH-4070 Basel , Switzerland
| | - Robert Britton
- Department of Chemistry , Simon Fraser University , Burnaby , British Columbia V5A 1S6 , Canada .
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33
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Mandal S, Bera T, Dubey G, Saha J, Laha JK. Uses of K2S2O8 in Metal-Catalyzed and Metal-Free Oxidative Transformations. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00743] [Citation(s) in RCA: 147] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Sudip Mandal
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Tishyasoumya Bera
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Gurudutt Dubey
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
| | - Jaideep Saha
- Centre of Biomedical Research, Division of Molecular Synthesis and Drug Discovery, SGPGIMS Campus, Raebareli Road, Lucknow 226014, India
| | - Joydev K. Laha
- Department of Pharmaceutical Technology (Process Chemistry), National Institute of Pharmaceutical Education and Research, S. A. S. Nagar, Punjab 160062, India
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34
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Danahy KE, Cooper JC, Van Humbeck JF. Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801280] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Kelley E. Danahy
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Ave. Cambridge MA 02139 USA
| | - Julian C. Cooper
- Department of Chemistry; Massachusetts Institute of Technology; 77 Massachusetts Ave. Cambridge MA 02139 USA
| | - Jeffrey F. Van Humbeck
- Department of Chemistry; University of Calgary; 2500 University Drive N.W. Calgary Alberta T2N 1N4 Canada
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35
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Danahy KE, Cooper JC, Van Humbeck JF. Benzylic Fluorination of Aza-Heterocycles Induced by Single-Electron Transfer to Selectfluor. Angew Chem Int Ed Engl 2018; 57:5134-5138. [PMID: 29486098 DOI: 10.1002/anie.201801280] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Indexed: 01/20/2023]
Abstract
A selective and mild method for the benzylic fluorination of aromatic azaheterocycles with Selectfluor is described. These reactions take place by a previously unreported mechanism, in which electron transfer from the heterocyclic substrate to the electrophilic fluorinating agent Selectfluor eventually yields a benzylic radical, thus leading to the desired C-F bond formation. This mechanism enables high intra- and intermolecular selectivity for aza-heterocycles over other benzylic components with similar C-H bond-dissociation energies.
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Affiliation(s)
- Kelley E Danahy
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA, 02139, USA
| | - Julian C Cooper
- Department of Chemistry, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, MA, 02139, USA
| | - Jeffrey F Van Humbeck
- Department of Chemistry, University of Calgary, 2500 University Drive N.W., Calgary, Alberta, T2N 1N4, Canada
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36
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Sheng J, Ni HQ, Bian KJ, Li Y, Wang YN, Wang XS. Nickel-catalyzed direct difluoromethylation of aryl boronic acids with BrCF2H. Org Chem Front 2018. [DOI: 10.1039/c7qo00934h] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nickel-catalyzed direct difluoromethylation of aryl boronic acids has been developed with the industrial raw material BrCF2H.
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Affiliation(s)
- Jie Sheng
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Hui-Qi Ni
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Kang-Jie Bian
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Yi-Ning Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry
- University of Science and Technology of China
- Hefei
- China
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37
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38
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Wang L, Wei J, Wu R, Cheng G, Li X, Hu J, Hu Y, Sheng R. The stability and reactivity of tri-, di-, and monofluoromethyl/methoxy/methylthio groups on arenes under acidic and basic conditions. Org Chem Front 2017. [DOI: 10.1039/c6qo00674d] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The stability and reactivity of tri-, di- and monofluoromethyl groups under acidic and basic conditions are described.
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Affiliation(s)
- Lingfei Wang
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
| | - Jun Wei
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
| | - Ranran Wu
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
| | - Gang Cheng
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
| | - Xinjin Li
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry
- Shanghai Institute of Organic Chemistry
- Chinese Academy of Sciences
- Shanghai 200032
- P. R. China
| | - Yongzhou Hu
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
| | - Rong Sheng
- College of Pharmaceutical Sciences
- Zhejiang University
- Hangzhou 310058
- P. R. China
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39
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Yuan G, Wang F, Stephenson NA, Wang L, Rotstein BH, Vasdev N, Tang P, Liang SH. Metal-free 18F-labeling of aryl-CF 2H via nucleophilic radiofluorination and oxidative C-H activation. Chem Commun (Camb) 2016; 53:126-129. [PMID: 27917423 PMCID: PMC5179041 DOI: 10.1039/c6cc07913j] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A metal-free and selective method to form [18F]aryl-CF2H through nucleophilic radiofluorination of benzyl (pseudo)halides and oxidative C-H activation of benzylic C-H bonds has been developed. The method is operationally simple and tolerates a variety of electron-neutral/deficient arenes and heteroarenes.
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Affiliation(s)
- Gengyang Yuan
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA. and Department of Chemistry & Chemical Biology, Northeastern University, 360 Huntington Ave., Boston, MA 02115, USA
| | - Feng Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China
| | - Nickeisha A Stephenson
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA.
| | - Lu Wang
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA.
| | - Benjamin H Rotstein
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA.
| | - Neil Vasdev
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA.
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, Nankai University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300071, China
| | - Steven H Liang
- Gordon Center for Medical Imaging & Division of Nuclear Medicine and Molecular Imaging, Massachusetts General Hospital and Department of Radiology, Harvard Medical School, 55 Fruit St., Boston, MA 02114, USA.
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40
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Chen T, Ren H, Zhang M, Zhang AQ. Investigation on Palladium-Catalysed α-Oxidation of Aromatic Ketones. JOURNAL OF CHEMICAL RESEARCH 2016. [DOI: 10.3184/174751916x14655713299386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A variety of 2-(2-methylphenyl)-2-oxoethyl acetates were prepared from aromatic ketones by α-oxidation in acetic acid, using palladium acetate as catalyst and (diacetoxyiodo)benzene as oxidant. The X-ray crystal structure of 5-acetyl-2-hydroxy-4-methylphenyl acetate was determined.
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Affiliation(s)
- Tianbao Chen
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Hexiang Ren
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Ming Zhang
- College of Chemistry and Chemical Engineering and Key Laboratory of Functional Small Organic Molecule, Ministry of Education, Jiangxi Normal University (Yaohu campus), Nanchang, 330022, P.R. China
| | - Ai Qin Zhang
- Department of Environmental and Chemical Engineering, Nanchang Hangkong University, Nanchang, 330063, P.R. China
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41
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Li X, Zhao J, Wang Y, Rong J, Hu M, Chen D, Xiao P, Ni C, Wang L, Hu J. Copper-Mediated Aromatic 1,1-Difluoroethylation with (1,1-Difluoroethyl)trimethylsilane (TMSCF2CH3). Chem Asian J 2016; 11:1789-92. [DOI: 10.1002/asia.201600577] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Xinjin Li
- Key Laboratory of Advanced Materials, Institute of Fine Chemicals; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jingwei Zhao
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Yunze Wang
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Jian Rong
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Mingyou Hu
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Dingben Chen
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Pan Xiao
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
| | - Limin Wang
- Key Laboratory of Advanced Materials, Institute of Fine Chemicals; East China University of Science and Technology; 130 Meilong Road Shanghai 200237 China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 China
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42
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Ohtsuka Y, Yamakawa T. Cobalt/diamine-catalyzed 1,1-difluoroethylation and 2,2,2-trifluoroethylation of aryl Grignard reagents with corresponding fluoroalkyl halides. J Fluor Chem 2016. [DOI: 10.1016/j.jfluchem.2016.03.007] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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43
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Intermolecular cyclization of N-methylanilines and maleimides to tetrahydroquinolines via K2S2O8 promoted C(sp3)–H activation. Tetrahedron Lett 2016. [DOI: 10.1016/j.tetlet.2016.02.078] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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44
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Koperniku A, Liu H, Hurley PB. Mono- and Difluorination of Benzylic Carbon Atoms. European J Org Chem 2016. [DOI: 10.1002/ejoc.201501329] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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45
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Li X, Shi ZJ. Aliphatic C–H azidation through a peroxydisulfate induced radical pathway. Org Chem Front 2016. [DOI: 10.1039/c6qo00237d] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition-metal-free, chemo- and regioselective aliphatic tertiary C–H bond azidation with good functional group tolerance is described.
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Affiliation(s)
- Xin Li
- Beijing National Laboratory of Molecular Sciences and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
| | - Zhang-Jie Shi
- Beijing National Laboratory of Molecular Sciences and Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- China
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46
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Ma JJ, Yi WB, Lu GP, Cai C. Trifluoromethylation of thiophenols and thiols with sodium trifluoromethanesulfinate and iodine pentoxide. Catal Sci Technol 2016. [DOI: 10.1039/c5cy01561h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A selective and facile trifluoromethylation process for a wide range of thiophenols and thiols under metal free conditions has been developed using two simple and safe solids, sodium trifluoro-methanesulfinate and iodine pentoxide, via the radical process.
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Affiliation(s)
- Jing-Jing Ma
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
| | - Wen-Bin Yi
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
| | - Guo-Ping Lu
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
| | - Chun Cai
- School of Chemical Engineering
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
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47
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Kulkarni KG, Miokovic B, Sauder M, Murphy GK. Denitrogenative hydrofluorination of aromatic aldehyde hydrazones using (difluoroiodo)toluene. Org Biomol Chem 2016; 14:9907-9911. [DOI: 10.1039/c6ob02074g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
(Difluoroiodo)toluene acts as both the oxidant and the fluoride source in this one-pot oxidation/denitrogenative hydrofluorination reaction.
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Affiliation(s)
| | - Boris Miokovic
- Department of Chemistry
- University of Waterloo
- Waterloo
- Canada
| | - Matthew Sauder
- Department of Chemistry
- University of Waterloo
- Waterloo
- Canada
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48
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Laha JK, Tummalapalli KSS, Nair A, Patel N. Sulfate Radical Anion (SO4•–) Mediated C(sp3)–H Nitrogenation/Oxygenation in N-Aryl Benzylic Amines Expanded the Scope for the Synthesis of Benzamidine/Oxazine Heterocycles. J Org Chem 2015; 80:11351-9. [DOI: 10.1021/acs.joc.5b01872] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joydev K. Laha
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - K. S. Satyanarayana Tummalapalli
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - Akshay Nair
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
| | - Nidhi Patel
- Department of Pharmaceutical
Technology (Process Chemistry) National Institute of Pharmaceutical Education and Research S. A. S. Nagar, Punjab 160062 India
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49
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Decarboxylative and Denitrative Trifluoromethylation for the Synthesis of CvinylCF3Compounds with Togni (II) Reagent. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500631] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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50
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Zhang Q, Mixdorf JC, Reynders GJ, Nguyen HM. Rhodium-catalyzed benzylic fluorination of trichloroacetimidates. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.04.066] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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