101
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Kim I, Park B, Kang G, Kim J, Jung H, Lee H, Baik M, Hong S. Visible‐Light‐Induced Pyridylation of Remote C(sp
3
)−H Bonds by Radical Translocation of N‐Alkoxypyridinium Salts. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201809879] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Inwon Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Bohyun Park
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Gyumin Kang
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Jiyun Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Hoimin Jung
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Hyeonyeong Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Mu‐Hyun Baik
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Sungwoo Hong
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
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102
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Kim I, Park B, Kang G, Kim J, Jung H, Lee H, Baik M, Hong S. Visible‐Light‐Induced Pyridylation of Remote C(sp
3
)−H Bonds by Radical Translocation of N‐Alkoxypyridinium Salts. Angew Chem Int Ed Engl 2018; 57:15517-15522. [DOI: 10.1002/anie.201809879] [Citation(s) in RCA: 111] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 10/02/2018] [Indexed: 01/07/2023]
Affiliation(s)
- Inwon Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Bohyun Park
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Gyumin Kang
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Jiyun Kim
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Hoimin Jung
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Hyeonyeong Lee
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Mu‐Hyun Baik
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
| | - Sungwoo Hong
- Department of ChemistryKorea Advanced Institute of Science and Technology Daejeon 34141 Korea
- Center for Catalytic Hydrocarbon Functionalization Institute for Basic Science (IBS) Daejeon 34141 Korea
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103
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Ma ZY, Guo LN, Gu YR, Chen L, Duan XH. Iminyl Radical-Mediated Controlled Hydroxyalkylation of Remote C(sp
3
)-H Bond via Tandem 1,5-HAT and Difunctionalization of Aryl Alkenes. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201801198] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Zhi-Yong Ma
- Department of Chemistry; School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 People's Republic of China
| | - Li-Na Guo
- Department of Chemistry; School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 People's Republic of China
| | - Yu-Rui Gu
- Department of Chemistry; School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 People's Republic of China
| | - Li Chen
- Department of Chemistry; School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 People's Republic of China
| | - Xin-Hua Duan
- Department of Chemistry; School of Science and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter; Xi'an Jiaotong University; Xi'an 710049 People's Republic of China
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104
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Morcillo SP, Dauncey EM, Kim JH, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalization of Amides and Amines Using Electrophilic Nitrogen Radicals. Angew Chem Int Ed Engl 2018; 57:12945-12949. [PMID: 30074300 PMCID: PMC6221136 DOI: 10.1002/anie.201807941] [Citation(s) in RCA: 180] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2018] [Indexed: 01/29/2023]
Abstract
The selective functionalization of C(sp3 )-H bonds at distal positions to functional groups is a challenging task in synthetic chemistry. Reported here is a photoinduced radical cascade strategy for the divergent functionalization of amides and protected amines. The process is based on the oxidative generation of electrophilic amidyl radicals and their subsequent transposition by 1,5-H-atom transfer, resulting in remote fluorination, chlorination and, for the first time, thioetherification, cyanation, and alkynylation. The process is tolerant of most common functional groups and delivers useful building blocks that can be further elaborated. The utility of this strategy is demonstrated through the late-stage functionalization of amino acids and a dipeptide.
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Affiliation(s)
- Sara P. Morcillo
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | | | - Ji Hye Kim
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - James J. Douglas
- Early Chemical DevelopmentPharmaceutical SciencesIMED Biotech UnitAstraZenecaMacclesfieldSK10 2NAUK
| | - Nadeem S. Sheikh
- Department of ChemistryFaculty of ScienceKing Faisal UniversityP.O. Box 380Al-Ahsa31982Saudi Arabia
| | - Daniele Leonori
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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105
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Matsubara H, Kawamoto T, Fukuyama T, Ryu I. Applications of Radical Carbonylation and Amine Addition Chemistry: 1,4-Hydrogen Transfer of 1-Hydroxylallyl Radicals. Acc Chem Res 2018; 51:2023-2035. [PMID: 30137961 DOI: 10.1021/acs.accounts.8b00278] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
1,4-Hydrogen transfer from the 1-hydroxyallyl radical to give the enoxyl (α-keto) radical is an exothermic process with a high activation energy based on DFT calculations. The lack of experimental examples of such 1,4-H shift reactions lies in the difficulty of generating the 1-hydroxyallyl radical. We have shown that radical carbonylation of alkenyl radicals with CO followed by nucleophilic trapping of the carbonyl portion of the resulting radical by amines gives rise to 1-amino-substituted 1-hydroxyallyl radicals in situ. At the outset of this chemistry, we examined intramolecular trapping reactions via radical carbonylation of alkynylamines mediated by tributyltin hydride. Consequently, α-methylene lactams were obtained, for which the initially formed 1-amino-substituted 1-hydroxyallyl radical underwent a 1,4-H shift followed by subsequent β-scission, which led to the expulsion of a tributyltin radical. A competing pathway of the 1,4-H shift of 1-amino-substituted 1-hydroxyallyl radicals involving hydrogen abstraction was observed, which led to the formation of α-stannylmethylene lactams as a major byproduct. However, in contrast, when intermolecular trapping of α-ketenyl radicals by amines was carried out, the 1,4-H shift from the 1-amino-substituted 1-hydroxyallyl radical became the major pathway, which gave good yields of α,β-unsaturated amides. Thus, we were able to develop three-component reactions comprising terminal alkynes, CO, and amines that led to α,β-unsaturated amides via the 1,4-H shift reaction. DFT calculations support the observation that the 1,4-H shift is more facile when 1-hydroxyallyl radicals have both 1-amino and 3-tin substituents. The choice of substituents on the amine nitrogen is also important, since N-C bond cleavage via an SH2-type reaction can become a competing pathway. Such an unusual SH2-type reaction at the amine nitrogen is favored when the leaving alkyl radicals are stable, such as PhC(•)H(CH3) and t-Bu•. Interestingly, even nucleophilic attack of tertiary amines onto α-ketenyl radicals causes cleavage of the C-N bond. For this reaction, DFT calculations predict an indirect homolytic substitution mechanism involving expulsion of alkyl radicals through the zwitterionic radical intermediate arising from nucleophilic amine addition onto the α-ketenyl radical. In contrast, the carbonylation of aryl radicals, generated from aryl iodides, in the presence of amines gave aromatic carboxylic amides in good yields. It is proposed that radical anions originating from acyl radicals and amines undergo electron transfer to aryl iodides to give aminocarbonylation products.
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Affiliation(s)
- Hiroshi Matsubara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takuji Kawamoto
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan 300, ROC
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106
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Matsubara H, Kawamoto T, Fukuyama T, Ryu I. Theoretical Calculations for the 1,4-Hydrogen Shift of 1-Hydroxyallyl Radicals Leading to α-Keto Radicals; Prediction of Facilitation by 1-Amino and 3-Tin Substituents. CHEM LETT 2018. [DOI: 10.1246/cl.180522] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hiroshi Matsubara
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takuji Kawamoto
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Takahide Fukuyama
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
| | - Ilhyong Ryu
- Department of Chemistry, Graduate School of Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu, Taiwan
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107
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Morcillo SP, Dauncey EM, Kim JH, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalization of Amides and Amines Using Electrophilic Nitrogen Radicals. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807941] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sara P. Morcillo
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Elizabeth M. Dauncey
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - Ji Hye Kim
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
| | - James J. Douglas
- Early Chemical Development; Pharmaceutical Sciences; IMED Biotech Unit; AstraZeneca; Macclesfield SK10 2NA UK
| | - Nadeem S. Sheikh
- Department of Chemistry; Faculty of Science; King Faisal University; P.O. Box 380 Al-Ahsa 31982 Saudi Arabia
| | - Daniele Leonori
- School of Chemistry; University of Manchester; Oxford Road Manchester M13 9PL UK
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108
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Ye B, Zhao J, Zhao K, McKenna JM, Toste FD. Chiral Diaryliodonium Phosphate Enables Light Driven Diastereoselective α-C(sp 3)-H Acetalization. J Am Chem Soc 2018; 140:8350-8356. [PMID: 29939024 PMCID: PMC6448391 DOI: 10.1021/jacs.8b05962] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
C(sp3)-H bond functionalization has emerged as a robust tool enabling rapid construction of molecular complexity from simple building blocks, and the development of asymmetric versions of this reaction creates a powerful methodology to access enantiopure sp3-rich materials. Herein, we report the stereoselective functionalization of C(sp3)-H bonds of cyclic ethers employing a photochemically active diaryliodonium salt in combination with an anionic phase-transfer catalyst. The synthetic strategy outlined herein allows for regio- and stereochemical control in the α-C-H acetalization of furans and pyrans using alcohol nucleophiles, thus providing the ability to control the configuration at the stereogenic exocyclic acetal carbon.
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Affiliation(s)
- Baihua Ye
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jie Zhao
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Ke Zhao
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Jeffrey M. McKenna
- Novartis Institutes for Biomedical Research, Cambridge, Massachusetts 02139, United States
| | - F. Dean Toste
- Department of Chemistry, University of California, Berkeley, California 94720, United States
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109
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Hayashi H, Kaga A, Wang B, Gagosz F, Chiba S. Use of a benzyl ether as a traceless hydrogen donor in the anti-Markovnikov hydrofunctionalization of alkenes with xanthates. Chem Commun (Camb) 2018; 54:7535-7538. [PMID: 29926014 DOI: 10.1039/c8cc02971g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
A new protocol for the anti-Markovnikov hydrofunctionalization of alkenyl alcohol O-Bn ethers was developed using xanthates as functionalizing agents in the presence of lauroyl peroxide as a radical initiator and a stoichiometric oxidant. The benzyl group serves as a traceless hydrogen donor in the remote radical hydrogen atom transfer event during the process.
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Affiliation(s)
- Hirohito Hayashi
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371, Singapore.
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110
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Shimoi M, Watanabe T, Maeda K, Curran DP, Taniguchi T. Radical trans-Hydroboration of Alkynes with N-Heterocyclic Carbene Boranes. Angew Chem Int Ed Engl 2018; 57:9485-9490. [PMID: 29845716 DOI: 10.1002/anie.201804515] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2018] [Revised: 05/28/2018] [Indexed: 01/06/2023]
Abstract
Hydroboration of internal alkynes with N-heterocyclic carbene boranes (NHC-boranes) occurs to provide stable NHC (E)-alkenylboranes upon thermolysis in the presence of di-tert-butyl peroxide. The E isomer results from an unusual trans-hydroboration, and the E/Z selectivity is typically high (90:10 or greater). Evidence suggests that this hydroboration occurs by a radical-chain reaction involving addition of an NHC-boryl radical to an alkyne to give a β-NHC-borylalkenyl radical. Ensuing hydrogen abstraction from the starting NHC-borane provides the product and returns the starting NHC-boryl radical. Experiments suggest that the observed trans-selectivity results from kinetic control in the hydrogen-transfer reaction.
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Affiliation(s)
- Masaki Shimoi
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Takashi Watanabe
- School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Katsuhiro Maeda
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.,Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
| | - Dennis P Curran
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA, 15260, USA
| | - Tsuyoshi Taniguchi
- Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan.,School of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, 920-1192, Japan
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111
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Shimoi M, Watanabe T, Maeda K, Curran DP, Taniguchi T. Radical trans
-Hydroboration of Alkynes with N-Heterocyclic Carbene Boranes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804515] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Masaki Shimoi
- Graduate School of Natural Science and Technology; Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
| | - Takashi Watanabe
- School of Pharmaceutical Sciences; Institute of Medical, Pharmaceutical and Health Sciences; Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
| | - Katsuhiro Maeda
- Graduate School of Natural Science and Technology; Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
- Nano Life Science Institute (WPI-NanoLSI); Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
| | - Dennis P. Curran
- Department of Chemistry; University of Pittsburgh; Pittsburgh PA 15260 USA
| | - Tsuyoshi Taniguchi
- Graduate School of Natural Science and Technology; Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
- School of Pharmaceutical Sciences; Institute of Medical, Pharmaceutical and Health Sciences; Kanazawa University; Kakuma-machi Kanazawa 920-1192 Japan
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112
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León EI, Martín A, Pérez-Martín I, Suárez E. Reductive Radical Cascades Triggered by Alkoxyl Radicals in the β-Cyclodextrin Framework. Org Lett 2018; 20:3385-3389. [DOI: 10.1021/acs.orglett.8b01308] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Elisa I. León
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Angeles Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Inés Pérez-Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
| | - Ernesto Suárez
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC, Carretera de la Esperanza 3, 38206 La Laguna, Tenerife, Spain
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113
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114
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Stateman LM, Nakafuku KM, Nagib DA. Remote C-H Functionalization via Selective Hydrogen Atom Transfer. SYNTHESIS-STUTTGART 2018; 50:1569-1586. [PMID: 29755145 PMCID: PMC5940016 DOI: 10.1055/s-0036-1591930] [Citation(s) in RCA: 283] [Impact Index Per Article: 47.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The selective functionalization of remote C-H bonds via intramolecular hydrogen atom transfer (HAT) is transformative for organic synthesis. This radical-mediated strategy provides access to novel reactivity that is complementary to closed-shell pathways. As modern methods for mild generation of radicals are continually developed, inherent selectivity paradigms of HAT mechanisms offer unparalleled opportunities for developing new strategies for C-H functionalization. This review outlines the history, recent advances, and mechanistic underpinnings of intramolecular HAT as a guide to addressing ongoing challenges in this arena.
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Affiliation(s)
- Leah M Stateman
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - Kohki M Nakafuku
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
| | - David A Nagib
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio, 43210, USA
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115
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Duhamel T, Stein CJ, Martínez C, Reiher M, Muñiz K. Engineering Molecular Iodine Catalysis for Alkyl–Nitrogen Bond Formation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00286] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Thomas Duhamel
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
- Facultad de Química, Universidad de Oviedo, C/Julián Claveria, 33006 Oviedo, Spain
| | - Christopher J. Stein
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Claudio Martínez
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
| | - Markus Reiher
- Laboratorium für Physikalische Chemie, ETH Zürich, Vladimir-Prelog-Weg 2, 8093 Zürich, Switzerland
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ), Av. Països Catalans 16, 43007 Tarragona, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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116
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Ratushnyy M, Parasram M, Wang Y, Gevorgyan V. Palladium-Catalyzed Atom-Transfer Radical Cyclization at Remote Unactivated C(sp 3 )-H Sites: Hydrogen-Atom Transfer of Hybrid Vinyl Palladium Radical Intermediates. Angew Chem Int Ed Engl 2018; 57:2712-2715. [PMID: 29341489 PMCID: PMC5829020 DOI: 10.1002/anie.201712775] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Indexed: 12/12/2022]
Abstract
A novel mild, visible-light-induced palladium-catalyzed hydrogen atom translocation/atom-transfer radical cyclization (HAT/ATRC) cascade has been developed. This protocol involves a 1,5-HAT process of previously unknown hybrid vinyl palladium radical intermediates, thus leading to iodomethyl carbo- and heterocyclic structures.
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Affiliation(s)
- Maxim Ratushnyy
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL, 60607-7061, USA
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL, 60607-7061, USA
| | - Yang Wang
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL, 60607-7061, USA
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 W. Taylor Street, Chicago, IL, 60607-7061, USA
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117
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Chang D, Zhao R, Wei C, Yao Y, Liu Y, Shi L. Sulfonamide-Directed Chemo- and Site-Selective Oxidative Halogenation/Amination Using Halogenating Reagents Generated in Situ from Cyclic Diacyl Peroxides. J Org Chem 2018; 83:3305-3315. [DOI: 10.1021/acs.joc.8b00243] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Denghu Chang
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Rong Zhao
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Congyin Wei
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yuan Yao
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Yang Liu
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
| | - Lei Shi
- Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen 518055, China
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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118
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Chuentragool P, Parasram M, Shi Y, Gevorgyan V. General, Mild, and Selective Method for Desaturation of Aliphatic Amines. J Am Chem Soc 2018; 140:2465-2468. [PMID: 29400959 PMCID: PMC5821538 DOI: 10.1021/jacs.8b00488] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A novel method for desaturation of aliphatic amines into enamines as well as allylic and homoallylic amines has been developed. This general protocol operates via putative aryl hybrid Pd-radical intermediates, which combine the signature features of radical chemistry, a hydrogen atom transfer (HAT) process, and transition metal chemistry, a selective β-hydride elimination step, to achieve efficient and selective desaturation of amines. These hybrid Pd-radical intermediates are efficiently generated under mild photoinduced conditions and are capable of a 1,n-HAT (n = 5-7) event at C(sp3)-H sites. The selectivity of HAT is tunable by varying different auxiliaries, which highlight the generality of this method. Remarkably, this desaturation method, which operates under mild conditions and does not require employment of exogenous photosensitizers or oxidants, can be performed in a practical scalable fashion from simple amines.
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Affiliation(s)
- Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Yi Shi
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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119
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Jin W, Zhou Y, Zhao Y, Ma Q, Kong L, Zhu G. Nickel-Catalyzed Remote Arylation of Alkenyl Aldehydes Initiated by Radical Alkylation with Tertiary α-Carbonyl Alkyl Bromides. Org Lett 2018; 20:1435-1438. [DOI: 10.1021/acs.orglett.8b00221] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Weiwei Jin
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Yulu Zhou
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Ying Zhao
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Qianqian Ma
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Lichun Kong
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education
for Advanced Catalysis Materials, Department of Chemistry, Zhejiang Normal University, 688 Yingbin Road, Jinhua 321004, China
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120
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Ratushnyy M, Parasram M, Wang Y, Gevorgyan V. Palladium‐Catalyzed Atom‐Transfer Radical Cyclization at Remote Unactivated C(sp
3
)−H Sites: Hydrogen‐Atom Transfer of Hybrid Vinyl Palladium Radical Intermediates. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712775] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Maxim Ratushnyy
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor Street Chicago IL 60607-7061 USA
| | - Marvin Parasram
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor Street Chicago IL 60607-7061 USA
| | - Yang Wang
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor Street Chicago IL 60607-7061 USA
| | - Vladimir Gevorgyan
- Department of Chemistry University of Illinois at Chicago 845 W. Taylor Street Chicago IL 60607-7061 USA
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121
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Dauncey EM, Morcillo SP, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalisations by Iminyl Radical Promoted C-C and C-H Bond Cleavage Cascades. Angew Chem Int Ed Engl 2018; 57:744-748. [PMID: 29114978 PMCID: PMC5814920 DOI: 10.1002/anie.201710790] [Citation(s) in RCA: 289] [Impact Index Per Article: 48.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Indexed: 11/20/2022]
Abstract
A photoinduced cascade strategy leading to a variety of differentially functionalised nitriles and ketones has been developed. These reactions rely on the oxidative generation of iminyl radicals from simple oximes. Radical transposition by C(sp3 )-(sp3 ) and C(sp3 )-H bond cleavage gives access to distal carbon radicals that undergo SH 2 functionalisations. These mild, visible-light-mediated procedures can be used for remote fluorination, chlorination, and azidation, and were applied to the modification of bioactive and structurally complex molecules.
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Affiliation(s)
| | - Sara P. Morcillo
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
| | - James J. Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech UnitAstraZenecaMacclesfieldSK10 2NAUK
| | - Nadeem S. Sheikh
- Department of ChemistryFaculty of ScienceKing Faisal UniversityP.O. Box 380Al-Ahsa31982Saudi Arabia
| | - Daniele Leonori
- School of ChemistryUniversity of ManchesterOxford RoadManchesterM13 9PLUK
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122
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Short MA, Blackburn JM, Roizen JL. Sulfamate Esters Guide Selective Radical-Mediated Chlorination of Aliphatic C-H Bonds. Angew Chem Int Ed Engl 2018; 57:296-299. [PMID: 29096044 PMCID: PMC5745255 DOI: 10.1002/anie.201710322] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Indexed: 01/29/2023]
Abstract
Masked alcohols are particularly appealing as directing groups because of the ubiquity of hydroxy groups in organic small molecules. Herein, we disclose a general strategy for aliphatic γ-C(sp3 )-H functionalization guided by a masked alcohol. Specifically, we determine that sulfamate ester derived nitrogen-centered radicals mediate 1,6-hydrogen-atom transfer (HAT) processes to guide γ-C(sp3 )-H chlorination. This reaction proceeds through a light-initiated radical chain-propagation process and is capable of installing chlorine atoms at primary, secondary, and tertiary centers.
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Affiliation(s)
- Melanie A Short
- Duke University, Department of Chemistry, Box 90346, Durham, NC, 27708-0354, USA
| | - J Miles Blackburn
- Duke University, Department of Chemistry, Box 90346, Durham, NC, 27708-0354, USA
| | - Jennifer L Roizen
- Duke University, Department of Chemistry, Box 90346, Durham, NC, 27708-0354, USA
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123
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Heteroatom-Centred Radicals for the Synthesis of Heterocyclic Compounds. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2018_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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124
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Li W, Xu W, Xie J, Yu S, Zhu C. Distal radical migration strategy: an emerging synthetic means. Chem Soc Rev 2018; 47:654-667. [DOI: 10.1039/c7cs00507e] [Citation(s) in RCA: 224] [Impact Index Per Article: 37.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
In the past three years, we have witnessed the rapid development of C–C and C–H bond functionalization by means of long-distance radical migration events which bring us a new platform to deal with the challenging C–C and C–H bond functionalization.
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Affiliation(s)
- Weipeng Li
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Wentao Xu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Jin Xie
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Shouyun Yu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
| | - Chengjian Zhu
- State Key Laboratory of Coordination Chemistry
- Jiangsu Key Laboratory of Advanced Organic Materials
- School of Chemistry and Chemical Engineering
- Nanjing University
- Nanjing 210023
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125
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Arif T, Borie C, Jean M, Vanthuyne N, Bertrand MP, Siri D, Nechab M. Organocopper triggered cyclization of conjugated dienynes via tandem SN2′/Alder-ene reaction. Org Chem Front 2018. [DOI: 10.1039/c7qo00288b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Propargylic carbonates were converted to indenes through a SN2′/Alder-ene cascade triggered by organocopper reagents.
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Affiliation(s)
| | | | - Marion Jean
- Aix-Marseille Univ
- Centrale Marseille
- CNRS
- iSm2
- Marseille
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126
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Wang N, Ye L, Li ZL, Li L, Li Z, Zhang HX, Guo Z, Gu QS, Liu XY. Hydrofunctionalization of alkenols triggered by the addition of diverse radicals to unactivated alkenes and subsequent remote hydrogen atom translocation. Org Chem Front 2018. [DOI: 10.1039/c8qo00734a] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Concomitant anti-Markovnikov hydrofunctionalization of alkenes and oxidation of remote alcohols are achieved through intramolecular 1,5(6)-hydrogen atom transfer.
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Affiliation(s)
- Na Wang
- College of Materials Science & Engineering
- Key Laboratory of Interface Science and Engineering in Advanced Materials
- Ministry of Education
- Taiyuan University of Technology
- Shanxi
| | - Liu Ye
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen
- China
| | - Zhong-Liang Li
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen
- China
| | - Lei Li
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Zhuang Li
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen 518055
- China
| | - Hong-Xia Zhang
- College of Materials Science & Engineering
- Key Laboratory of Interface Science and Engineering in Advanced Materials
- Ministry of Education
- Taiyuan University of Technology
- Shanxi
| | - Zhen Guo
- College of Materials Science & Engineering
- Key Laboratory of Interface Science and Engineering in Advanced Materials
- Ministry of Education
- Taiyuan University of Technology
- Shanxi
| | - Qiang-Shuai Gu
- Academy for Advanced Interdisciplinary Studies
- Southern University of Science and Technology
- Shenzhen
- China
| | - Xin-Yuan Liu
- Department of Chemistry and Shenzhen Grubbs Institute
- Southern University of Science and Technology
- Shenzhen 518055
- China
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127
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Wang B, Jin S, Sun S, Cheng J. Radical rearrangement of N-sulfonyl-N-aryl propynamides: proceeding with homolytic N–SO2 bond cleavage and 6-endo-dig cyclization toward 3-sulfonyl-2(1H)-quinolinones. Org Chem Front 2018. [DOI: 10.1039/c7qo01048f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A di-tert-butyl peroxide-promoted radical rearrangement of N-sulfonyl-N-aryl propynamides has been developed, giving 2-sulfonyl-3-aryl-2(1H)-quinolinones in moderate to good yields.
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Affiliation(s)
- Bingbing Wang
- School of Petrochemical Engineering
- and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Shengnan Jin
- School of Petrochemical Engineering
- and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Song Sun
- School of Petrochemical Engineering
- and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
| | - Jiang Cheng
- School of Petrochemical Engineering
- and Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology
- Changzhou University
- Changzhou 213164
- P. R. China
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128
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van Leest NP, Epping RF, van Vliet KM, Lankelma M, van den Heuvel EJ, Heijtbrink N, Broersen R, de Bruin B. Single-Electron Elementary Steps in Homogeneous Organometallic Catalysis. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2018. [DOI: 10.1016/bs.adomc.2018.07.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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129
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Zhang J, Jin W, Cheng C, Luo F. Copper-catalyzed remote oxidation of alcohols initiated by radical difluoroalkylation of alkenes: facile access to difluoroalkylated carbonyl compounds. Org Biomol Chem 2018; 16:3876-3880. [DOI: 10.1039/c8ob00889b] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A Cu-catalyzed oxidation of alcohols triggered by the radical difluoroalkylation of alkenes has been developed.
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Affiliation(s)
- Jian Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Weiwei Jin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Cungui Cheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
| | - Fang Luo
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials
- Department of Chemistry
- Zhejiang Normal University
- Jinhua 321004
- China
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130
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Short MA, Blackburn JM, Roizen JL. Sulfamate Esters Guide Selective Radical‐Mediated Chlorination of Aliphatic C−H Bonds. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710322] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Melanie A. Short
- Duke University Department of Chemistry, Box 90346 Durham NC 27708-0354 USA
| | - J. Miles Blackburn
- Duke University Department of Chemistry, Box 90346 Durham NC 27708-0354 USA
| | - Jennifer L. Roizen
- Duke University Department of Chemistry, Box 90346 Durham NC 27708-0354 USA
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131
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Dauncey EM, Morcillo SP, Douglas JJ, Sheikh NS, Leonori D. Photoinduced Remote Functionalisations by Iminyl Radical Promoted C−C and C−H Bond Cleavage Cascades. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710790] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Sara P. Morcillo
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
| | - James J. Douglas
- Early Chemical Development, Pharmaceutical Sciences, IMED Biotech UnitAstraZeneca Macclesfield SK10 2NA UK
| | - Nadeem S. Sheikh
- Department of ChemistryFaculty of ScienceKing Faisal University P.O. Box 380 Al-Ahsa 31982 Saudi Arabia
| | - Daniele Leonori
- School of ChemistryUniversity of Manchester Oxford Road Manchester M13 9PL UK
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132
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Alcaide B, Almendros P, Fernández I, Herrera F, Luna A. De Novo Synthesis of α-Hydroxy Ketones by Gallic Acid-Promoted Aerobic Coupling of Terminal Alkynes with Diazonium Salts. Chemistry 2017; 23:17227-17230. [DOI: 10.1002/chem.201705106] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Indexed: 01/15/2023]
Affiliation(s)
- Benito Alcaide
- Grupo de Lactamas y Heterociclos Bioactivos, Unidad Asociada al CSIC, Departamento de Química Orgánica I, Facultad de Ciencias Químicas; Universidad Complutense de Madrid; E-28040 Madrid Spain
| | - Pedro Almendros
- Instituto de Química Orgánica General, IQOG; Consejo Superior de Investigaciones Científicas, CSIC; Juan de la Cierva 3 28006 Madrid Spain
| | - Israel Fernández
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada, Facultad de Ciencias Químicas; Universidad Complutense de Madrid; E-28040 Madrid Spain
| | - Fernando Herrera
- Grupo de Lactamas y Heterociclos Bioactivos, Unidad Asociada al CSIC, Departamento de Química Orgánica I, Facultad de Ciencias Químicas; Universidad Complutense de Madrid; E-28040 Madrid Spain
| | - Amparo Luna
- Grupo de Lactamas y Heterociclos Bioactivos, Unidad Asociada al CSIC, Departamento de Química Orgánica I, Facultad de Ciencias Químicas; Universidad Complutense de Madrid; E-28040 Madrid Spain
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133
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Parasram M, Chuentragool P, Wang Y, Shi Y, Gevorgyan V. General, Auxiliary-Enabled Photoinduced Pd-Catalyzed Remote Desaturation of Aliphatic Alcohols. J Am Chem Soc 2017; 139:14857-14860. [PMID: 28992686 PMCID: PMC5729750 DOI: 10.1021/jacs.7b08459] [Citation(s) in RCA: 116] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
A general, efficient, and site-selective visible light-induced Pd-catalyzed remote desaturation of aliphatic alcohols into valuable allylic, homoallylic, and bis-homoallylic alcohols has been developed. This transformation operates via a hybrid Pd-radical mechanism, which synergistically combines the favorable features of radical approaches, such as a facile remote C-H HAT step, with that of transition-metal-catalyzed chemistry (selective β-hydrogen elimination step). This allows achieving superior degrees of regioselectivity and yields in the desaturation of alcohols compared to those obtained by the state-of-the-art desaturation methods. The HAT at unactivated C(sp3)-H sites is enabled by the easily installable/removable Si-auxiliaries. Formation of the key hybrid alkyl Pd-radical intermediates is efficiently induced by visible light from alkyl iodides and Pd(0) complexes. Notably, this method requires no exogenous photosensitizers or external oxidants.
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Affiliation(s)
- Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Yang Wang
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Yi Shi
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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134
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Chen DF, Chu JCK, Rovis T. Directed γ-C(sp 3)-H Alkylation of Carboxylic Acid Derivatives through Visible Light Photoredox Catalysis. J Am Chem Soc 2017; 139:14897-14900. [PMID: 29022709 DOI: 10.1021/jacs.7b09306] [Citation(s) in RCA: 144] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Visible light photoredox catalysis enables direct γ- C(sp3)-H alkylation of saturated aliphatic carbonyl compounds. Electron-deficient alkenes are used as the coupling partners in this reaction. Distinguished site selectivity is controlled by the predominant 1,5-hydrogen atom transfer of an amidyl radical generated in situ.
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Affiliation(s)
- Dian-Feng Chen
- Department of Chemistry, Columbia University , New York, New York 10027, United States
| | - John C K Chu
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
| | - Tomislav Rovis
- Department of Chemistry, Columbia University , New York, New York 10027, United States
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135
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Du S, Kimball EA, Ragains JR. Visible-Light-Promoted Remote C-H Functionalization of o-Diazoniaphenyl Alkyl Sulfones. Org Lett 2017; 19:5553-5556. [PMID: 28956928 DOI: 10.1021/acs.orglett.7b02650] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Visible-light irradiation of ortho-diazoniaphenyl alkyl sulfones in the presence of Ru(bpy)32+ results in remote Csp3-H functionalization. Key mechanistic steps in these processes involve intramolecular hydrogen atom transfer from Csp3-H bonds to aryl radicals to generate alkyl/benzyl radicals. Subsequent polar crossover occurs by single-electron oxidation of the alkyl/benzyl radicals to carbenium ions that then intercept nucleophiles. We have developed remote hydroxylations, etherifications, an amidation, and C-C bond formation processes using this strategy.
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Affiliation(s)
- Shaofu Du
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Elizabeth Ann Kimball
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
| | - Justin R Ragains
- Department of Chemistry, Louisiana State University , Baton Rouge, Louisiana 70803, United States
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136
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Kärkäs MD. Photochemical Generation of Nitrogen-Centered Amidyl, Hydrazonyl, and Imidyl Radicals: Methodology Developments and Catalytic Applications. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01385] [Citation(s) in RCA: 280] [Impact Index Per Article: 40.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Markus D. Kärkäs
- Department of Organic Chemistry,
Arrhenius Laboratory, Stockholm University, SE-106 91 Stockholm, Sweden
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137
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Wang Y, Olankitwanit A, Rajca S, Rajca A. Intramolecular Hydrogen Atom Transfer in Aminyl Radical at Room Temperature with Large Kinetic Isotope Effect. J Am Chem Soc 2017; 139:7144-7147. [PMID: 28514849 PMCID: PMC5528148 DOI: 10.1021/jacs.7b02692] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report a large kinetic isotope effect at 298 K, kH/kD ≈ 150, associated with an intramolecular 1,5-hydrogen atom transfer (1,5-HAT) in the decay of a PEGylated carbazyl (aminyl) radical in solution. The experimental observations surprisingly combine the hallmarks of tunneling, including large KIEs and unusual activation parameters, with linear Arrhenius and Eyring plots over an exceptionally wide temperature range of 116 K.
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Affiliation(s)
- Ying Wang
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304
| | - Arnon Olankitwanit
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304
| | - Suchada Rajca
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304
| | - Andrzej Rajca
- Department of Chemistry, University of Nebraska, Lincoln, Nebraska 68588-0304
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138
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Zhang H, Muñiz K. Selective Piperidine Synthesis Exploiting Iodine-Catalyzed Csp3–H Amination under Visible Light. ACS Catal 2017. [DOI: 10.1021/acscatal.7b00928] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hongwei Zhang
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 16 Avgda. Països Catalans, 43007 Tarragona, Spain
| | - Kilian Muñiz
- Institute
of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, 16 Avgda. Països Catalans, 43007 Tarragona, Spain
- ICREA, Pg. Lluís Companys 23, 08010 Barcelona, Spain
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139
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Wang Y, Cai PJ, Yu ZX. Carbanion Translocations via Intramolecular Proton Transfers: A Quantum Chemical Study. J Org Chem 2017; 82:4604-4612. [DOI: 10.1021/acs.joc.7b00194] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Yi Wang
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Pei-Jun Cai
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory
for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry
and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
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140
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Wang R, Li Y, Jin RX, Wang XS. Copper-catalyzed oxidative C(sp 3)-H/C(sp 2)-H cross-coupling en route to carbocyclic rings. Chem Sci 2017; 8:3838-3842. [PMID: 28966775 PMCID: PMC5577718 DOI: 10.1039/c7sc00250e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 03/14/2017] [Indexed: 11/21/2022] Open
Abstract
Copper-catalyzed C(sp3)–H/C(sp2)–H cross-coupling via directed 1,5-hydrogen atom transfer has been developed to construct 6-membered carbocyclic rings.
Copper-catalyzed selective coupling of C(sp3)–H bonds with C(sp2)–H bonds has been developed. An aniline module was used as a directing group to generate an aminyl radical, which selectively cleaves the secondary and tertiary C(sp3)–H bonds via a 1,5-HAT process to forge six-membered carbocyclic rings.
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Affiliation(s)
- Rui Wang
- Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China .
| | - Yan Li
- Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China .
| | - Ruo-Xing Jin
- Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China .
| | - Xi-Sheng Wang
- Department of Chemistry , University of Science and Technology of China , 96 Jinzhai Road , Hefei , Anhui 230026 , China .
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141
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Vega JA, Alonso JM, Méndez G, Ciordia M, Delgado F, Trabanco AA. Continuous Flow α-Arylation of N,N-Dialkylhydrazones under Visible-Light Photoredox Catalysis. Org Lett 2017; 19:938-941. [PMID: 28181814 DOI: 10.1021/acs.orglett.7b00117] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The first direct α-arylation of aldehyde-derived N,N-dialkylhydrazones with electron deficient aryl and heteroaryl cyanides under visible-light photoredox catalysis has been developed. Structurally complex α,α'-diaryl-N,N-cycloalkylhydrazones were obtained in moderate yields by repetition of the direct arylation protocol. A continuous-flow procedure for the preparation of α-aryl-N,N-dialkylhydrazones on a multigram scale has also been established.
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Affiliation(s)
- Juan A Vega
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
| | - José Manuel Alonso
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
| | - Gabriela Méndez
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
| | - Myriam Ciordia
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
| | - Francisca Delgado
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
| | - Andrés A Trabanco
- Neuroscience Medicinal Chemistry, Janssen Research & Development , Jarama 75A, 45007 Toledo, Spain
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142
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Nie X, Cheng C, Zhu G. Palladium-Catalyzed Remote Aryldifluoroalkylation of Alkenyl Aldehydes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611697] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Xingliang Nie
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
| | - Cungui Cheng
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
| | - Gangguo Zhu
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
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143
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Nie X, Cheng C, Zhu G. Palladium-Catalyzed Remote Aryldifluoroalkylation of Alkenyl Aldehydes. Angew Chem Int Ed Engl 2017; 56:1898-1902. [DOI: 10.1002/anie.201611697] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Xingliang Nie
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
| | - Cungui Cheng
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
| | - Gangguo Zhu
- Department of Chemistry; Zhejiang Normal University; 688 Yingbin Road Jinhua 321004 P.R. China
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144
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Li L, Ye L, Ni SF, Li ZL, Chen S, Du YM, Li XH, Dang L, Liu XY. Phosphine-catalyzed remote α-C–H bond activation of alcohols or amines triggered by the radical trifluoromethylation of alkenes: reaction development and mechanistic insights. Org Chem Front 2017. [DOI: 10.1039/c7qo00500h] [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
An efficient radical protocol for concomitant functionalization of both alkenes and remote α-C–H bonds of alcohols or amines via 1,5(6,7)-HAT was realized in a highly controlled site-selective manner.
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Affiliation(s)
- Lei Li
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
| | - Liu Ye
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
- State Key Laboratory and Institute of Elemento-Organic Chemistry
| | - Shao-Fei Ni
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
| | - Zhong-Liang Li
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
| | - Su Chen
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
| | - Yi-Meng Du
- School of Chemical Biology and Biotechnology
- Peking University Shenzhen Graduate School
- Shenzhen
- China
| | - Xiao-Hua Li
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
| | - Li Dang
- Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province
- Shantou University
- Guangdong 515063
- P. R. China
| | - Xin-Yuan Liu
- Department of Chemistry
- South University of Science and Technology of China
- Shenzhen
- P. R. China
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145
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Bagal DB, Park SW, Song HJ, Chang S. Visible light sensitization of benzoyl azides: cascade cyclization toward oxindoles via a non-nitrene pathway. Chem Commun (Camb) 2017; 53:8798-8801. [DOI: 10.1039/c7cc04852a] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Visible light photocatalytic activation of benzoyl azides is implemented for a cascade cyclization toward synthetically versatile oxindoles and spirooxindoles.
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Affiliation(s)
- Dattatraya B. Bagal
- Center for Catalytic Hydrocarbon Functionalizations
- Institute for Basic Science (IBS)
- Daejeon 34141
- Republic of Korea
- Department of Chemistry
| | - Sung-Woo Park
- Center for Catalytic Hydrocarbon Functionalizations
- Institute for Basic Science (IBS)
- Daejeon 34141
- Republic of Korea
- Department of Chemistry
| | - Hyun-Ji Song
- Center for Catalytic Hydrocarbon Functionalizations
- Institute for Basic Science (IBS)
- Daejeon 34141
- Republic of Korea
- Department of Chemistry
| | - Sukbok Chang
- Center for Catalytic Hydrocarbon Functionalizations
- Institute for Basic Science (IBS)
- Daejeon 34141
- Republic of Korea
- Department of Chemistry
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146
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Yuan W, Zhou Z, Gong L, Meggers E. Asymmetric alkylation of remote C(sp3)–H bonds by combining proton-coupled electron transfer with chiral Lewis acid catalysis. Chem Commun (Camb) 2017; 53:8964-8967. [DOI: 10.1039/c7cc04941b] [Citation(s) in RCA: 93] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The catalytic asymmetric alkylation of the remote, unactivated δ-position of N-alkyl amides was enabled by the combination of visible-light-induced proton-coupled electron transfer, 1,5-hydrogen atom transfer, and chiral Lewis acid catalysis.
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Affiliation(s)
- Wei Yuan
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- People's Republic of China
| | - Zijun Zhou
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- People's Republic of China
| | - Lei Gong
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- People's Republic of China
| | - Eric Meggers
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen
- People's Republic of China
- Fachbereich Chemie
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147
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148
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Alvarez-Dorta D, León EI, Kennedy AR, Martín A, Pérez-Martín I, Suárez E. Radical-Mediated C-H Functionalization: A Strategy for Access to Modified Cyclodextrins. J Org Chem 2016; 81:11766-11787. [PMID: 27806207 DOI: 10.1021/acs.joc.6b02241] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A simple and efficient radical C-H functionalization to access modified cyclodextrins (CDs) has been developed. The well-defined conformation of glycosidic and aglyconic bonds in α-, β-, and γ-CDs favors the intramolecular 1,8-hydrogen atom transfer (HAT) promoted by the 6I-O-yl radical, which abstracts regioselectively the hydrogen at C5II of the contiguous pyranose. The C5II-radical evolves by a polar crossover mechanism to a stable 1,3,5-trioxocane ring between two adjacent glucoses or alternatively triggers the inversion of one α-d-glucose into a 5-C-acetoxy-β-l-idose unit possessing a 1C4 conformation. The 6I,IV- and 6I,III-diols of α- and β-CDs behave similarly to the monoalcohols, forming mostly compounds originating from two 1,8-HAT consecutive processes. In the case of 6I,II-diols the proximity of the two 6-O-yl radicals in adjacent sugar units allows the formation of unique lactone rings within the CD framework via a 1,8-HAT-β-scission tandem mechanism. X-ray diffraction carried out on the crystalline 1,4-bis(trioxocane)-α-CD derivative shows a severe distortion toward a narrower elliptical shape for the primary face.
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Affiliation(s)
- Dimitri Alvarez-Dorta
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC , Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Elisa I León
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC , Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Alan R Kennedy
- WestCHEM Department of Pure and Applied Chemistry, University of Strathclyde , 295 Cathedral Street, Glasgow G1 1XL, Scotland, U.K
| | - Angeles Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC , Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Inés Pérez-Martín
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC , Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
| | - Ernesto Suárez
- Síntesis de Productos Naturales, Instituto de Productos Naturales y Agrobiología del CSIC , Carretera de La Esperanza 3, 38206, La Laguna, Tenerife, Spain
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149
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Liu P, Tang J, Zeng X. Site-Selective Silylation of Aliphatic C-H Bonds Mediated by [1,5]-Hydrogen Transfer: Synthesis of α-Sila Benzamides. Org Lett 2016; 18:5536-5539. [PMID: 27774791 DOI: 10.1021/acs.orglett.6b02784] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The first example of site-selective silylation of C(sp3)-H bonds mediated by a [1,5]-hydrogen transfer is reported. This reaction occurs selectively at the α-position of benzamides with a combination of tert-butylmagnesium chloride and a catalytic amount of 4,4'-di-tert-butylbipyridine (dtbpy) ligand and provides a facile route for the creation of biologically interesting α-sila benzamides. Late-stage functionalization of the incorporated silyl moieties facilitates the synthesis of N-formyl, cis-enamine, β-hydroxyl, amino, and pyrrole-containing derivatives.
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Affiliation(s)
- Pei Liu
- Center for Organic Chemistry, Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an 710054, China
| | - Jinghua Tang
- Center for Organic Chemistry, Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an 710054, China
| | - Xiaoming Zeng
- Center for Organic Chemistry, Frontier Institute of Science and Technology, Xi'an Jiaotong University , Xi'an 710054, China.,Department of Chemistry, Northeast Normal University , Changchun 130024, China.,State Key Laboratory of Elemento-organic Chemistry, Nankai University , Tianjin 300071, China
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150
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Soulard V, Dénès F, Renaud P. Effect of Brønsted acids on the thiophenol-mediated radical addition–translocation–cyclization process for the preparation of pyrrolidine derivatives. Free Radic Res 2016; 50:S2-S5. [DOI: 10.1080/10715762.2016.1223294] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Valentin Soulard
- Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland
| | - Fabrice Dénès
- CEISAM UMR 6230 – UFR des Sciences et des Techniques, Université de Nantes, Nantes, Cedex 3, France
| | - Philippe Renaud
- Department of Chemistry and Biochemistry, University of Bern, Bern, Switzerland
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