51
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Liu J, Wei Y, Shi M. Direct Activation of a Remote C(sp
3
)–H Bond Enabled by a Visible‐Light Photosensitized Allene Moiety. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jiaxin Liu
- State Key Laboratory of Organometallic Chemistry University of Chinese Academy of Sciences Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry University of Chinese Academy of Sciences Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry University of Chinese Academy of Sciences Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry Chinese Academy of Sciences 345 Lingling Road Shanghai 200032 China
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52
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Brunard E, Boquet V, Van Elslande E, Saget T, Dauban P. Catalytic Intermolecular C(sp 3)-H Amination: Selective Functionalization of Tertiary C-H Bonds vs Activated Benzylic C-H Bonds. J Am Chem Soc 2021; 143:6407-6412. [PMID: 33900759 DOI: 10.1021/jacs.1c03872] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A catalytic intermolecular amination of nonactivated tertiary C(sp3)-H bonds (BDE of 96 kcal·mol-1) is reported for substrates displaying an activated benzylic site (BDE of 85 kcal·mol-1). The tertiary C(sp3)-H bond is selectively functionalized to afford α,α,α-trisubstituted amides in high yields. This unusual site-selectivity results from the synergistic combination of Rh2(S-tfpttl)4, a rhodium(II) complex with a well-defined catalytic pocket, with tert-butylphenol sulfamate (TBPhsNH2), which leads to a discriminating rhodium-bound nitrene species under mild oxidative conditions. This catalytic system is very robust, and the reaction was performed on a 50 mmol scale with only 0.01 mol % of catalyst. The TBPhs group can be removed under mild conditions to afford the corresponding NH-free amines.
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Affiliation(s)
- Erwan Brunard
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Vincent Boquet
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Elsa Van Elslande
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Tanguy Saget
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
| | - Philippe Dauban
- Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198 Gif-sur-Yvette, France
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53
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Yan D, Matsuda Y. Genome Mining-Driven Discovery of 5-Methylorsellinate-Derived Meroterpenoids from Aspergillus funiculosus. Org Lett 2021; 23:3211-3215. [PMID: 33821662 DOI: 10.1021/acs.orglett.1c00951] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Heterologous expression of a cryptic gene cluster in the fungus Aspergillus funiculosus CBS 116.56 led to the discovery of four new meroterpenoids, funiculolides A-D (1-4), derived from the aromatic polyketide 5-methylorsellinic acid (5-MOA). Intriguingly, funiculolide D (4), the apparent end product of the pathway, harbors an unusual spirocyclopentanone moiety, which is synthesized by the oxidative rearrangement catalyzed by the ferrous iron and α-ketoglutarate-dependent dioxygenase FncG.
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Affiliation(s)
- Dexiu Yan
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
| | - Yudai Matsuda
- Department of Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong SAR, China
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54
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Krylov IB, Segida OO, Budnikov AS, Terent'ev AO. Oxime‐Derived Iminyl Radicals in Selective Processes of Hydrogen Atom Transfer and Addition to Carbon‐Carbon π‐Bonds. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100058] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Igor B. Krylov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Oleg O. Segida
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander S. Budnikov
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
| | - Alexander O. Terent'ev
- N. D. Zelinsky Institute of Organic Chemistry Russian Academy of Sciences Leninsky Prospekt 47 119991 Moscow Russian Federation
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55
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Lee W, Jung S, Kim M, Hong S. Site-Selective Direct C–H Pyridylation of Unactivated Alkanes by Triplet Excited Anthraquinone. J Am Chem Soc 2021; 143:3003-3012. [DOI: 10.1021/jacs.1c00549] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Wooseok Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sungwoo Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Minseok Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
| | - Sungwoo Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, Korea
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56
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Nobile E, Castanheiro T, Besset T. Radical‐Promoted Distal C−H Functionalization of C(sp
3
) Centers with Fluorinated Moieties. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202009995] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Enzo Nobile
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Thomas Castanheiro
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
| | - Tatiana Besset
- Normandie Univ INSA Rouen UNIROUEN CNRS COBRA (UMR 6014) 76000 Rouen France
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57
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Kim W, Koo J, Lee HG. Benzylic C(sp 3)-C(sp 2) cross-coupling of indoles enabled by oxidative radical generation and nickel catalysis. Chem Sci 2021; 12:4119-4125. [PMID: 34163683 PMCID: PMC8179435 DOI: 10.1039/d0sc06666d] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 02/01/2021] [Indexed: 11/21/2022] Open
Abstract
A mechanistically unique functionalization strategy for a benzylic C(sp3)-H bond has been developed based on the facile oxidation event of indole substrates. This novel pathway was initiated by efficient radical generation at the benzylic position of the substrate, with subsequent transition metal catalysis to complete the overall transformation. Ultimately, an aryl or an acyl group could be effectively delivered from an aryl (pseudo)halide or an acid anhydride coupling partner, respectively. The developed method utilizes mild conditions and exhibits a wide substrate scope for both substituted indoles and C(sp2)-based reaction counterparts. Mechanistic studies have shown that competitive hydrogen atom transfer (HAT) processes, which are frequently encountered in conventional methods, are not involved in the product formation process of the developed strategy.
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Affiliation(s)
- Weonjeong Kim
- Department of Chemistry, College of Natural Science, Seoul National University 1 Gwanak-ro Seoul 08826 South Korea
| | - Jangwoo Koo
- Department of Chemistry, College of Natural Science, Seoul National University 1 Gwanak-ro Seoul 08826 South Korea
| | - Hong Geun Lee
- Department of Chemistry, College of Natural Science, Seoul National University 1 Gwanak-ro Seoul 08826 South Korea
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58
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Jin RX, Dai JC, Li Y, Wang XS. Copper-Catalyzed Intramolecular Amination of C(sp 3)-H Bond of Secondary Amines to Access Azacycles. Org Lett 2021; 23:421-426. [PMID: 33395308 DOI: 10.1021/acs.orglett.0c03934] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The cross-coupling of C-N bond directly from inert C-H bonds is an ideal approach to synthesize saturated azacycles due to its high efficiency and atom economy. In this article, a copper-catalyzed intramolecular amination via the cross coupling of C(sp3)-H and N-H bonds of secondary amine has been reported, which exhibit excellent chemo- and regioselectivity, extensive substrate scope, and functional group tolerance in good to excellent yield, offering an efficient pathway to build nitrogen-containing heterocycle skeletons.
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Affiliation(s)
- Ruo-Xing Jin
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Jing-Cheng Dai
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui 230026, China
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59
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Ma ZY, Li M, Guo LN, Liu L, Wang D, Duan XH. Sulfonamide as Photoinduced Hydrogen-Atom Transfer Catalyst for Regioselective Alkylation of C(sp 3)-H Bonds Adjacent to Heteroatoms. Org Lett 2020; 23:474-479. [PMID: 33373258 DOI: 10.1021/acs.orglett.0c03992] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Based on the DFT calculations, the sulfonamide was explored as an efficient hydrogen-atom transfer catalyst for the C(sp3)-H alkylation. The combination of a metal-free photoredox catalyst and a sulfonamide catalyst enables highly regioselective alkylation of the C-H bonds adjacent to heteroatoms, which features broad substrate scope and excellent functional group compatibility. Remarkably, the sulfonamide catalyst was also applicable to the C(sp3)-C(sp3) couplings through the merger of photoredox, nickel, and HAT catalysis.
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Affiliation(s)
- Zhi-Yong Ma
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Mengyang Li
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Li-Na Guo
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Le Liu
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Dongdong Wang
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Xin-Hua Duan
- Department of Chemistry, School of Chemistry, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Xi'an Jiaotong University, Xi'an 710049, P.R. China.,State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, P.R. China
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60
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Zhang Q, Shi BF. Site-selective functionalization of remote aliphatic C-H bonds via C-H metallation. Chem Sci 2020; 12:841-852. [PMID: 34163851 PMCID: PMC8179183 DOI: 10.1039/d0sc05944g] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 11/26/2020] [Indexed: 12/14/2022] Open
Abstract
Directing group assistance provided a paradigm for controlling site-selectivity in transition metal-catalyzed C-H functionalization reactions. However, the kinetically and thermodynamically favored formation of 5-membered metallacycles has greatly hampered the selective activation of remote C(sp3)-H bonds via larger-membered metallacycles. Recent development to achieve remote C(sp3)-H functionalization via the C-H metallation process largely relies on employing specific substrates without accessible proximal C-H bonds. Encouragingly, recent advances in this field have enabled the selective functionalization of remote aliphatic C-H bonds in the presence of equally accessible proximal ones by taking advantage of the switch of the regiodetermining step, ring strain of metallacycles, multiple non-covalent interactions, and favourable reductive elimination from larger-membered metallacycles. In this review, we summarize these advancements according to the strategies used, hoping to facilitate further efforts to achieve site- and even enantioselective functionalization of remote C(sp3)-H bonds.
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Affiliation(s)
- Qi Zhang
- Department of Chemistry, Zhejiang University Hangzhou 310027 China
| | - Bing-Feng Shi
- Department of Chemistry, Zhejiang University Hangzhou 310027 China
- College of Chemistry and Molecular Engineering, Zhengzhou University Zhengzhou 450001 China
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61
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Sarkar S, Cheung KPS, Gevorgyan V. C-H functionalization reactions enabled by hydrogen atom transfer to carbon-centered radicals. Chem Sci 2020; 11:12974-12993. [PMID: 34123240 PMCID: PMC8163321 DOI: 10.1039/d0sc04881j] [Citation(s) in RCA: 142] [Impact Index Per Article: 35.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Accepted: 11/14/2020] [Indexed: 12/12/2022] Open
Abstract
Selective functionalization of ubiquitous unactivated C-H bonds is a continuous quest for synthetic organic chemists. In addition to transition metal catalysis, which typically operates under a two-electron manifold, a recent renaissance in the radical approach relying on the hydrogen atom transfer (HAT) process has led to tremendous growth in the area. Despite several challenges, protocols proceeding via HAT are highly sought after as they allow for relatively easy activation of inert C-H bonds under mild conditions leading to a broader scope and higher functional group tolerance and sometimes complementary reactivity over methods relying on traditional transition metal catalysis. A number of methods operating via heteroatom-based HAT have been extensively reported over the past few years, while methods employing more challenging carbon analogues have been less explored. Recent developments of mild methodologies for generation of various carbon-centered radical species enabled their utilization in the HAT process, which, in turn, led to the development of remote C(sp3)-H functionalization reactions of alcohols, amines, amides and related compounds. This review covers mostly recent advances in C-H functionalization reactions involving the HAT step to carbon-centered radicals.
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Affiliation(s)
- Sumon Sarkar
- Department of Chemistry and Biochemistry, University of Texas at Dallas 800 W Campbell Rd Richardson Texas 75080 USA
| | - Kelvin Pak Shing Cheung
- Department of Chemistry and Biochemistry, University of Texas at Dallas 800 W Campbell Rd Richardson Texas 75080 USA
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas 800 W Campbell Rd Richardson Texas 75080 USA
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62
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Lu H, Zhang M, Li B, Ma H, Wang W, Ding Y, Li X, Hu A. Experimental and Computational Study on the Reaction Pathways of Diradical Intermediates Formed from Myers‐Saito Cyclization of Maleimide‐Based Enediynes. ASIAN J ORG CHEM 2020. [DOI: 10.1002/ajoc.202000432] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haotian Lu
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Mengsi Zhang
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Baojun Li
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Hailong Ma
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Wenbo Wang
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Yun Ding
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Xinxin Li
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
| | - Aiguo Hu
- Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology Shanghai 200237 P. R. China
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63
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Das J, Guin S, Maiti D. Diverse strategies for transition metal catalyzed distal C(sp 3)-H functionalizations. Chem Sci 2020; 11:10887-10909. [PMID: 34094339 PMCID: PMC8162984 DOI: 10.1039/d0sc04676k] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Accepted: 09/26/2020] [Indexed: 01/26/2023] Open
Abstract
Transition metal catalyzed C(sp3)-H functionalization is a rapidly growing field. Despite severe challenges, distal C-H functionalizations of aliphatic molecules by overriding proximal positions have witnessed tremendous progress. While usage of stoichiometric directing groups played a crucial role, reactions with catalytic transient directing groups or methods without any directing groups are gaining more attention due to their practicality. Various innovative strategies, slowly but steadily, circumvented issues related to remote functionalizations of aliphatic molecules. A systematic compilation has been presented here to provide insights into the recent developments and future challenges in the field. The Present perspective is expected to open up a new dimension and provide an avenue for deep insights into the distal C(sp3)-H functionalizations that could be applied routinely in various pharmaceutical and agrochemical industries.
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Affiliation(s)
- Jayabrata Das
- Department of Chemistry, IIT Bombay Powai Mumbai 400076 India
| | - Srimanta Guin
- Department of Chemistry, IIT Bombay Powai Mumbai 400076 India
| | - Debabrata Maiti
- Department of Chemistry, IIT Bombay Powai Mumbai 400076 India
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64
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Bian KJ, Li Y, Zhang KF, He Y, Wu TR, Wang CY, Wang XS. Iron-catalyzed remote functionalization of inert C(sp 3)-H bonds of alkenes via 1, n-hydrogen-atom-transfer by C-centered radical relay. Chem Sci 2020; 11:10437-10443. [PMID: 34123184 PMCID: PMC8162260 DOI: 10.1039/d0sc03987j] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
As an alternative approach to traditional C-H activation that often involved harsh conditions, and vicinal or primary C-H functionalization, radical relay offers a solution to these long-held problems. Enabled by 1,n (n = 5, 6)-hydrogen atom transfer (HAT), we use a most prevalent moiety, alkene, as the precursor to an sp3 C-centered radical to promote selective cleavage of inert C(sp3)-H bonds for the generation of azidotrifluoromethylated molecules. Mild conditions, broad scope and excellent regioselective control (>20 : 1) are observed in the reactions. Deuterium labelling studies disclose the kinetic characteristics of the transformations and verify a direct 1,n-HAT pathway. The key to this C-centered radical relay is that iron plays a dual role as a radical initiator and terminator to incorporate the azide functionality through radical oxidation via azido-ligand-transfer. The methods and the later derivatization promise expeditious synthesis of CF3-containing organic azides, γ-lactam and triazoles that are widely used in designing new fluorescent tags and functional materials.
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Affiliation(s)
- Kang-Jie Bian
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Yan Li
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Kai-Fan Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Yan He
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Tian-Rui Wu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Cheng-Yu Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
| | - Xi-Sheng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China 96 Jinzhai Road Hefei Anhui 230026 China
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65
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Liu Y, Song H, Zhang C, Liu Y, Shi B. Copper‐Catalyzed
Modular Access to
N
‐Fused
Polycyclic Indoles and
5‐Aroyl
‐pyrrol‐2‐ones
via
Intramolecular N—H/C—H Annulation with Alkynes: Scope and Mechanism Probes. CHINESE J CHEM 2020. [DOI: 10.1002/cjoc.202000246] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yan‐Hua Liu
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Hong Song
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Chi Zhang
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Yue‐Jin Liu
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
| | - Bing‐Feng Shi
- Department of Chemistry, Zhejiang University, Hangzhou Zhejiang 310027 China
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66
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Leitch JA, Rossolini T, Rogova T, Dixon DJ. α-Tertiary Dialkyl Ether Synthesis via Reductive Photocatalytic α-Functionalization of Alkyl Enol Ethers. ACS Catal 2020. [DOI: 10.1021/acscatal.0c02584] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Jamie A. Leitch
- Department of Chemistry, University of Oxford, Chemistry Research
Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Thomas Rossolini
- Department of Chemistry, University of Oxford, Chemistry Research
Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Tatiana Rogova
- Department of Chemistry, University of Oxford, Chemistry Research
Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Darren J. Dixon
- Department of Chemistry, University of Oxford, Chemistry Research
Laboratory, 12 Mansfield Road, Oxford OX1 3TA, United Kingdom
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67
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Yakubov S, Barham JP. Photosensitized direct C-H fluorination and trifluoromethylation in organic synthesis. Beilstein J Org Chem 2020; 16:2151-2192. [PMID: 32952732 PMCID: PMC7476599 DOI: 10.3762/bjoc.16.183] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Accepted: 08/17/2020] [Indexed: 12/11/2022] Open
Abstract
The importance of fluorinated products in pharmaceutical and medicinal chemistry has necessitated the development of synthetic fluorination methods, of which direct C-H fluorination is among the most powerful. Despite the challenges and limitations associated with the direct fluorination of unactivated C-H bonds, appreciable advancements in manipulating the selectivity and reactivity have been made, especially via transition metal catalysis and photochemistry. Where transition metal catalysis provides one strategy for C-H bond activation, transition-metal-free photochemical C-H fluorination can provide a complementary selectivity via a radical mechanism that proceeds under milder conditions than thermal radical activation methods. One exciting development in C-F bond formation is the use of small-molecule photosensitizers, allowing the reactions i) to proceed under mild conditions, ii) to be user-friendly, iii) to be cost-effective and iv) to be more amenable to scalability than typical photoredox-catalyzed methods. In this review, we highlight photosensitized C-H fluorination as a recent strategy for the direct and remote activation of C-H (especially C(sp3)-H) bonds. To guide the readers, we present the developing mechanistic understandings of these reactions and exemplify concepts to assist the future planning of reactions.
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Affiliation(s)
- Shahboz Yakubov
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany
| | - Joshua P Barham
- Fakultät für Chemie und Pharmazie, Universität Regensburg, Universitätsstraße 31, 93040 Regensburg, Germany
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68
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Liang W, Jiang K, Du F, Yang J, Shuai L, Ouyang Q, Chen Y, Wei Y. Iron‐Catalyzed, Iminyl Radical‐Triggered Cascade 1,5‐Hydrogen Atom Transfer/(5+2) or (5+1) Annulation: Oxime as a Five‐Atom Assembling Unit. Angew Chem Int Ed Engl 2020; 59:19222-19228. [DOI: 10.1002/anie.202007825] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 07/04/2020] [Indexed: 12/14/2022]
Affiliation(s)
- Wu Liang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Jie Yang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Li Shuai
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Qin Ouyang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
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69
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Liang W, Jiang K, Du F, Yang J, Shuai L, Ouyang Q, Chen Y, Wei Y. Iron‐Catalyzed, Iminyl Radical‐Triggered Cascade 1,5‐Hydrogen Atom Transfer/(5+2) or (5+1) Annulation: Oxime as a Five‐Atom Assembling Unit. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202007825] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Wu Liang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Kun Jiang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Fei Du
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Jie Yang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Li Shuai
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Qin Ouyang
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ying‐Chun Chen
- College of Pharmacy Army Medical University Chongqing 400038 China
| | - Ye Wei
- College of Pharmacy Army Medical University Chongqing 400038 China
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70
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Terhorst S, Tiwari DP, Meister D, Petran B, Rissanen K, Bolm C. Syntheses of Trifluoroethylated N-Heterocycles from Vinyl Azides and Togni's Reagent Involving 1, n-Hydrogen-Atom Transfer Reactions. Org Lett 2020; 22:4766-4770. [PMID: 32496070 DOI: 10.1021/acs.orglett.0c01566] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2,2,2-Trifluoroethyl-substituted 3-oxazolines, 3-thiazolines, and 5,6-dihydro-2H-1,3-oxazines have been obtained by reacting substituted vinyl azides with a combination of Togni's reagent and substoichiometric amounts of iron(II) chloride. The results of density functional theory calculations support the proposed mechanism involving 1,n-hydrogen-atom transfer reactions.
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Affiliation(s)
- Steven Terhorst
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Deo Prakash Tiwari
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Daniela Meister
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Benedict Petran
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
| | - Kari Rissanen
- University of Jyvaskyla, Department of Chemistry, P.O. Box. 35, FI-40014 Jyväskylä, Finland
| | - Carsten Bolm
- RWTH Aachen University, Institute of Organic Chemistry, Landoltweg 1, D-52074 Aachen, Germany
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71
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Bonjoch J, Diaba F. Radical Reactions in Alkaloid Synthesis: A Perspective from Carbon Radical Precursors. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000391] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Josep Bonjoch
- Laboratori de Química Orgànica Facultat de Farmàcia, IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
| | - Faiza Diaba
- Laboratori de Química Orgànica Facultat de Farmàcia, IBUB Universitat de Barcelona Av. Joan XXIII s/n 08028 Barcelona Spain
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72
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73
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An Update on Distal C(
sp
3
)−H Functionalization Involving 1,5‐HAT Emerging from Nitrogen Radicals. Isr J Chem 2020. [DOI: 10.1002/ijch.201900172] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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74
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Guo Q, Peng Q, Chai H, Huo Y, Wang S, Xu Z. Visible-light promoted regioselective amination and alkylation of remote C(sp 3)-H bonds. Nat Commun 2020; 11:1463. [PMID: 32193371 PMCID: PMC7081228 DOI: 10.1038/s41467-020-15167-2] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2019] [Accepted: 02/21/2020] [Indexed: 11/10/2022] Open
Abstract
The C-N cross coupling reaction has always been a fundamental task in organic synthesis. However, the direct use of N-H group of aryl amines to generate N-centered radicals which would couple with alkyl radicals to construct C-N bonds is still rare. Here we report a visible light-promoted C-N radical cross coupling for regioselective amination of remote C(sp3)-H bonds. Under visible light irradiation, the N-H groups of aryl amines are converted to N-centered radicals, and are then trapped by alkyl radicals, which are generated from Hofmann-Löffler-Freytag (HLF) type 1,5-hydrogen atom transfer (1,5-HAT). With the same strategy, the regioselective C(sp3)-C(sp3) cross coupling is also realized by using alkyl Hantzsch esters (or nitrile) as radical alkylation reagents. Notably, the α-C(sp3)-H of tertiary amines can be directly alkylated to form the C(sp3)-C(sp3) bonds via C(sp3)-H − C(sp3)-H cross coupling through the same photoredox pathway. C-N bond forming is an established strategy to form amines, which are quintessential in chemical synthesis and in nature. Here, the authors report three classes of photoredox reactions, involving C(sp3)-N coupling between N-centered radicals and alkyl radicals and C(sp3)- C(sp3) coupling via C(sp3)-H alkylation.
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Affiliation(s)
- Quanping Guo
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Qiang Peng
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Hongli Chai
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Yumei Huo
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Shan Wang
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China
| | - Zhaoqing Xu
- Institute of Drug Design & Synthesis, Institute of Pharmacology, Key Laboratory of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Science, Lanzhou University, 199 West Donggang Road, Lanzhou, 730000, China.
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75
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Kumar G, Pradhan S, Chatterjee I. N‐Centered Radical Directed Remote C−H Bond Functionalization via Hydrogen Atom Transfer. Chem Asian J 2020; 15:651-672. [DOI: 10.1002/asia.201901744] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/16/2020] [Indexed: 12/31/2022]
Affiliation(s)
- Gautam Kumar
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
| | - Suman Pradhan
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
| | - Indranil Chatterjee
- Department of ChemistryIndian Institute of Technology Ropar Nangal Road, Rupnagar Punjab 140001 India
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76
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Chen AD, Herbort JH, Wappes EA, Nakafuku KM, Mustafa DN, Nagib DA. Radical cascade synthesis of azoles via tandem hydrogen atom transfer. Chem Sci 2020; 11:2479-2486. [PMID: 34084413 PMCID: PMC8157396 DOI: 10.1039/c9sc06239d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Accepted: 01/24/2020] [Indexed: 12/12/2022] Open
Abstract
A radical cascade strategy for the modular synthesis of five-membered heteroarenes (e.g. oxazoles, imidazoles) from feedstock reagents (e.g. alcohols, amines, nitriles) has been developed. This double C-H oxidation is enabled by in situ generated imidate and acyloxy radicals, which afford regio- and chemo-selective β C-H bis-functionalization. The broad synthetic utility of this tandem hydrogen atom transfer (HAT) approach to access azoles is included, along with experiments and computations that provide insight into the selectivity and mechanism of both HAT events.
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Affiliation(s)
- Andrew D Chen
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - James H Herbort
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Ethan A Wappes
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Kohki M Nakafuku
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - Darsheed N Mustafa
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
| | - David A Nagib
- Department of Chemistry and Biochemistry, The Ohio State University Columbus OH 43210 USA
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77
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Zhang H, Tian P, Ma L, Zhou Y, Jiang C, Lin X, Xiao X. Remote Directed Isocyanation of Unactivated C(sp3)–H Bonds: Forging Seven-Membered Cyclic Ureas Enabled by Copper Catalysis. Org Lett 2020; 22:997-1002. [DOI: 10.1021/acs.orglett.9b04542] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Hongwei Zhang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Peiyuan Tian
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Lishuang Ma
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Yulu Zhou
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Cuiyu Jiang
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Xufeng Lin
- Department of Chemistry, College of Science, China University of Petroleum (East China) Qingdao, Shandong 266580, People’s Republic of China
| | - Xiao Xiao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Chaowang Road 18#, Hangzhou 310014, People’s Republic of China
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78
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Liao Y, Ran Y, Liu G, Liu P, Liu X. Transition-metal-free radical relay cyclization of vinyl azides with 1,4-dihydropyridines involving a 1,5-hydrogen-atom transfer: access to α-tetralone scaffolds. Org Chem Front 2020. [DOI: 10.1039/d0qo01042a] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The remote C(sp3)–H functionalization enabled by a radical-mediated 1,5-hydrogen-atom transfer (HAT) process using vinyl azides and 1,4-dihydropyridines as precursors has been described.
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Affiliation(s)
- Yangzhen Liao
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Yu Ran
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Guijun Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Peijun Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
| | - Xiaozu Liu
- Key Laboratory of Biocatalysis & Chiral Drug Synthesis of Guizhou Province
- Generic Drug Research Center of Guizhou Province
- School of Pharmacy
- Zunyi Medical University
- Zunyi 563000
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79
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Short MA, Blackburn JM, Roizen JL. Modifying Positional Selectivity in C-H Functionalization Reactions with Nitrogen-Centered Radicals: Generalizable Approaches to 1,6-Hydrogen-Atom Transfer Processes. Synlett 2020; 31:102-116. [PMID: 33986583 PMCID: PMC8115226 DOI: 10.1055/s-0039-1691501] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Nitrogen-centered radicals are powerful reaction intermediates owing in part to their ability to guide position-selective C(sp3)-H functionalization reactions. Typically, these reactive species dictate the site of functionalization by preferentially engaging in 1,5-hydrogen-atom transfer (1,5-HAT) processes. Broadly relevant approaches to alter the site-selectivity of HAT pathways would be valuable because they could be paired with a variety of tactics to install diverse functional groups. Yet, until recently, there have been no generalizable strategies to modify the position-selectivity observed in these HAT processes. This Synpacts article reviews transformations in which nitrogen-centered radicals preferentially react through 1,6-HAT pathways. Specific attention will be focused on strategies that employ alcohol- and amine-anchored sulfamate esters and sulfamides as templates to achieve otherwise rare γ-selective functionalization reactions.
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Affiliation(s)
- Melanie A. Short
- Department of Chemistry, Duke University, Box 90346, Durham, North Carolina, 27708-0354, USA
| | - J. Miles Blackburn
- Department of Chemistry, Duke University, Box 90346, Durham, North Carolina, 27708-0354, USA
| | - Jennifer L. Roizen
- Department of Chemistry, Duke University, Box 90346, Durham, North Carolina, 27708-0354, USA
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80
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Liu Y, You T, Wang HX, Tang Z, Zhou CY, Che CM. Iron- and cobalt-catalyzed C(sp3)–H bond functionalization reactions and their application in organic synthesis. Chem Soc Rev 2020; 49:5310-5358. [DOI: 10.1039/d0cs00340a] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
This review highlights the developments in iron and cobalt catalyzed C(sp3)–H bond functionalization reactions with emphasis on their applications in organic synthesis, i.e. natural products and pharmaceuticals synthesis and/or modification.
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Affiliation(s)
- Yungen Liu
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- P. R. China
| | - Tingjie You
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Hai-Xu Wang
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Zhou Tang
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Cong-Ying Zhou
- Department of Chemistry
- State Key Laboratory of Synthetic Chemistry
- The University of Hong Kong
- Hong Kong
- P. R. China
| | - Chi-Ming Che
- Department of Chemistry
- Southern University of Science and Technology
- Shenzhen
- P. R. China
- Department of Chemistry
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81
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Pinter EN, Bingham JE, AbuSalim DI, Cook SP. N-Directed fluorination of unactivated Csp 3-H bonds. Chem Sci 2019; 11:1102-1106. [PMID: 34084366 PMCID: PMC8146735 DOI: 10.1039/c9sc04055b] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Site-selective fluorination of aliphatic C-H bonds remains synthetically challenging. While directed C-H fluorination represents the most promising approach, the limited work conducted to date has enabled just a few functional groups as the arbiters of direction. Leveraging insights gained from both computations and experimentation, we enabled the use of the ubiquitous amine functional group as a handle for the directed C-H fluorination of Csp3-H bonds. By converting primary amines to adamantoyl-based fluoroamides, site-selective C-H fluorination proceeds under the influence of a simple iron catalyst in 20 minutes. Computational studies revealed a unique reaction coordinate for the catalytic process and offer an explanation for the high site selectivity.
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Affiliation(s)
- Emily N Pinter
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405-7102 USA
| | - Jenna E Bingham
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405-7102 USA
| | - Deyaa I AbuSalim
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405-7102 USA
| | - Silas P Cook
- Department of Chemistry, Indiana University 800 East Kirkwood Avenue Bloomington IN 47405-7102 USA
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82
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Zhang J, Liu D, Liu S, Ge Y, Lan Y, Chen Y. Visible-Light-Induced Alkoxyl Radicals Enable α-C(sp 3)-H Bond Allylation. iScience 2019; 23:100755. [PMID: 31884167 PMCID: PMC6941871 DOI: 10.1016/j.isci.2019.100755] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 11/08/2019] [Accepted: 11/27/2019] [Indexed: 11/18/2022] Open
Abstract
The alkoxyl radical is an essential reactive intermediate in mechanistic studies and organic synthesis with hydrogen atom transfer (HAT) reactivity. However, compared with intramolecular 1,5-HAT or intermolecular HAT of alkoxyl radicals, the intramolecular 1,2-HAT reactivity has been limited to theoretical studies and rarely synthetically utilized. Here we report the first selective 1,2-HAT of alkoxyl radicals for α-C(sp3)-H bond allylation of α-carbonyl, α-cyano, α-trifluoromethyl, and benzylic N-alkoxylphthalimides. The mechanistic probing experiments, electron paramagnetic resonance (EPR) studies, and density functional theory (DFT) calculations confirmed the 1,2-HAT reactivity of alkoxyl radicals, and the use of protic solvents lowered the activation energy by up to 10.4 kcal/mol to facilitate the α-C(sp3)-H allylation reaction.
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Affiliation(s)
- Jing Zhang
- State Key Laboratory of Bioorganic and Natural Products 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
| | - Dan Liu
- State Key Laboratory of Bioorganic and Natural Products 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
| | - Song Liu
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China
| | - Yuanyuan Ge
- State Key Laboratory of Bioorganic and Natural Products 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
| | - Yu Lan
- School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400030, China; Green Catalysis Center, College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Yiyun Chen
- State Key Laboratory of Bioorganic and Natural Products 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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83
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84
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Kim N, Lee C, Kim T, Hong S. Visible-Light-Induced Remote C(sp 3)-H Pyridylation of Sulfonamides and Carboxamides. Org Lett 2019; 21:9719-9723. [PMID: 31736318 DOI: 10.1021/acs.orglett.9b03879] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Visible-light-induced site-selective C(sp3)-H pyridylation of amides has been accomplished using N-amidopyridinium salts. The N-centered radicals generated by the single-electron reduction of N-amidopyridinium substrates undergo 1,5-hydrogen atom transfer to form alkyl radical intermediates. Excellent C4-selectivity in radical trapping with pyridinium salts is observed for the alkyl radicals to provide δ-pyridyl sulfonamides and γ-pyridyl carboxamides. The utility is demonstrated by offering a practical approach for the late-stage functionalization of complex amide derivatives.
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Affiliation(s)
- Namhoon Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Changseok Lee
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Taehwan Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
| | - Sungwoo Hong
- Department of Chemistry , Korea Advanced Institute of Science and Technology (KAIST) , Daejeon , 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science (IBS) , Daejeon 34141 , Korea
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85
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Short MA, Shehata MF, Sanders MA, Roizen JL. Sulfamides direct radical-mediated chlorination of aliphatic C-H bonds. Chem Sci 2019; 11:217-223. [PMID: 34040715 PMCID: PMC8132995 DOI: 10.1039/c9sc03428e] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Given the prevalence of aliphatic amines in bioactive small molecules, amine derivatives are opportune as directing groups. Herein, sulfamides serve as amine surrogates to guide intermolecular chlorine-transfer at γ-C(sp3) centers. This unusual position-selectivity arises because accessed sulfamidyl radical intermediates engage preferentially in otherwise rare 1,6-hydrogen-atom transfer (HAT) processes through seven-membered transition states. The site-selectivity of C–H abstraction can be modulated by adjusting the steric and electronic properties of the sulfamide nitrogen substituents, an ability that has not been demonstrated with other substrate classes. The disclosed reaction relies on a light-initiated radical chain-propagation mechanism to oxidize C(sp3)–H bonds efficiently. Amine-anchored sulfamides direct radical-mediated chlorination of aliphatic C–H bonds. The site of C–H abstraction can be modulated by varying the sulfamide nitrogen substituents, a feature that has not been demonstrated with other substrate classes.![]()
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Affiliation(s)
- Melanie A Short
- Duke University, Department of Chemistry Box 90346 Durham North Carolina 27709-0354 USA
| | - Mina F Shehata
- Duke University, Department of Chemistry Box 90346 Durham North Carolina 27709-0354 USA
| | - Matthew A Sanders
- Duke University, Department of Chemistry Box 90346 Durham North Carolina 27709-0354 USA
| | - Jennifer L Roizen
- Duke University, Department of Chemistry Box 90346 Durham North Carolina 27709-0354 USA
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86
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
| | - Armido Studer
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology State Key Laboratory of Structural Chemistry Center for Excellence in Molecular Synthesis Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences 155 Yangqiao Road West Fuzhou Fujian 350002 P. R. China
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Corrensstraße 40 48149 Münster Deutschland
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87
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Leifert D, Studer A. The Persistent Radical Effect in Organic Synthesis. Angew Chem Int Ed Engl 2019; 59:74-108. [PMID: 31116479 DOI: 10.1002/anie.201903726] [Citation(s) in RCA: 401] [Impact Index Per Article: 80.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Indexed: 12/14/2022]
Abstract
Radical-radical couplings are mostly nearly diffusion-controlled processes. Therefore, the selective cross-coupling of two different radicals is challenging and not a synthetically valuable transformation. However, if the radicals have different lifetimes and if they are generated at equal rates, cross-coupling will become the dominant process. This high cross-selectivity is based on a kinetic phenomenon called the persistent radical effect (PRE). In this Review, an explanation of the PRE supported by simulations of simple model systems is provided. Radical stabilities are discussed within the context of their lifetimes, and various examples of PRE-mediated radical-radical couplings in synthesis are summarized. It is shown that the PRE is not restricted to the coupling of a persistent with a transient radical. If one coupling partner is longer-lived than the other transient radical, the PRE operates and high cross-selectivity is achieved. This important point expands the scope of PRE-mediated radical chemistry. The Review is divided into two parts, namely 1) the coupling of persistent or longer-lived organic radicals and 2) "radical-metal crossover reactions"; here, metal-centered radical species and more generally longer-lived transition-metal complexes that are able to react with radicals are discussed-a field that has flourished recently.
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Affiliation(s)
- Dirk Leifert
- Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
| | - Armido Studer
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian, 350002, P. R. China.,Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstraße 40, 48149, Münster, Germany
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88
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Lefebvre C, Fortier L, Hoffmann N. Photochemical Rearrangements in Heterocyclic Chemistry. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901190] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Corentin Lefebvre
- CNRS, Université de Reims Champagne-Ardenne; ICMR, Equipe de Photochimie, UFR Sciences; B.P. 1039 51687 Reims France
| | - Lucas Fortier
- CNRS, Université de Reims Champagne-Ardenne; ICMR, Equipe de Photochimie, UFR Sciences; B.P. 1039 51687 Reims France
| | - Norbert Hoffmann
- CNRS, Université de Reims Champagne-Ardenne; ICMR, Equipe de Photochimie, UFR Sciences; B.P. 1039 51687 Reims France
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89
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Dauncey EM, Dighe SU, Douglas JJ, Leonori D. A dual photoredox-nickel strategy for remote functionalization via iminyl radicals: radical ring-opening-arylation, -vinylation and -alkylation cascades. Chem Sci 2019; 10:7728-7733. [PMID: 32180920 PMCID: PMC7053659 DOI: 10.1039/c9sc02616a] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Accepted: 06/26/2019] [Indexed: 12/22/2022] Open
Abstract
A divergent strategy for the remote arylation, vinylation and alkylation of nitriles is described. These processes proceed through the photoredox generation of a cyclic iminyl radical and its following ring-opening reaction. The distal nitrile radical is then engaged in nickel-based catalytic cycles to form C-C bonds with aryl bromides, alkynes and alkyl bromides.
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Affiliation(s)
- Elizabeth M Dauncey
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - Shashikant U Dighe
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
| | - James J Douglas
- Early Chemical Development , Pharmaceutical Sciences , AstraZeneca, R&D , Macclesfield SK10 2NA , UK
| | - Daniele Leonori
- School of Chemistry , University of Manchester , Oxford Road , Manchester M13 9PL , UK .
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90
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Kim R, Ferreira AJ, Beaudry CM. Total Synthesis of Leuconoxine, Melodinine E, and Mersicarpine through a Radical Translocation–Cyclization Cascade. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201907455] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ryan Kim
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97333 USA
| | - Andrew J. Ferreira
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97333 USA
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91
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Huang CY, Kang H, Li J, Li CJ. En Route to Intermolecular Cross-Dehydrogenative Coupling Reactions. J Org Chem 2019; 84:12705-12721. [DOI: 10.1021/acs.joc.9b01704] [Citation(s) in RCA: 143] [Impact Index Per Article: 28.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Chia-Yu Huang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Hyotaik Kang
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Jianbin Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
| | - Chao-Jun Li
- Department of Chemistry and FRQNT Centre for Green Chemistry and Catalysis, McGill University, 801 Sherbrooke Street W, Montreal, Quebec H3A 0B8, Canada
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92
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Kanegusuku ALG, Castanheiro T, Ayer SK, Roizen JL. Sulfamyl Radicals Direct Photoredox-Mediated Giese Reactions at Unactivated C(3)-H Bonds. Org Lett 2019; 21:6089-6095. [PMID: 31313933 DOI: 10.1021/acs.orglett.9b02234] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Alcohol-anchored sulfamate esters guide the alkylation of tertiary and secondary aliphatic C(3)-H bonds. The transformation proceeds directly from N-H bonds with a catalytic oxidant, a contrast to prior methods which have required preoxidation of the reactive nitrogen center, or employed stoichiometric amounts of strong oxidants to obtain the sulfamyl radical. These sulfamyl radicals template otherwise rare 1,6-hydrogen-atom transfer (HAT) processes via seven-membered ring transition states to enable C(3)-H functionalization during Giese reactions.
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Affiliation(s)
- Anastasia L G Kanegusuku
- Duke University , Department of Chemistry , Box 90346, Durham , North Carolina 27708-0354 , United States
| | - Thomas Castanheiro
- Duke University , Department of Chemistry , Box 90346, Durham , North Carolina 27708-0354 , United States
| | - Suraj K Ayer
- Duke University , Department of Chemistry , Box 90346, Durham , North Carolina 27708-0354 , United States
| | - Jennifer L Roizen
- Duke University , Department of Chemistry , Box 90346, Durham , North Carolina 27708-0354 , United States
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93
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Kim R, Ferreira AJ, Beaudry CM. Total Synthesis of Leuconoxine, Melodinine E, and Mersicarpine through a Radical Translocation–Cyclization Cascade. Angew Chem Int Ed Engl 2019; 58:12595-12598. [DOI: 10.1002/anie.201907455] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Ryan Kim
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97333 USA
| | - Andrew J. Ferreira
- Department of Chemistry Oregon State University 153 Gilbert Hall Corvallis OR 97333 USA
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94
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Ma ZY, Guo LN, You Y, Yang F, Hu M, Duan XH. Visible Light Driven Alkylation of C(sp 3)-H Bonds Enabled by 1,6-Hydrogen Atom Transfer/Radical Relay Addition. Org Lett 2019; 21:5500-5504. [PMID: 31246029 DOI: 10.1021/acs.orglett.9b01804] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A visible-light-driven sulfamate esters guided alkylation of unactivated C(sp3)-H bonds enabled by a 1,6-HAT/radical addition cascade is described. Not only structurally diverse Michael acceptors but also styrenes are amenable to this alkylation reaction. Notably, the N-H bonds activation radical relay refrained from prefunctionalization and using excess external oxidants.
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Affiliation(s)
- Zhi-Yong Ma
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China
| | - Li-Na Guo
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China
| | - Ying You
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China
| | - Fan Yang
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China
| | - Mingyou Hu
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China
| | - Xin-Hua Duan
- Department of Chemistry, School of Science, Xi'an Key Laboratory of Sustainable Energy Material Chemistry and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter , Xi'an Jiaotong University , Xi'an 710049 , P. R. China.,State Key Laboratory of Applied Organic Chemistry , Lanzhou University , Lanzhou 730000 , P. R. China
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95
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Bafaluy D, Muñoz‐Molina JM, Funes‐Ardoiz I, Herold S, de Aguirre AJ, Zhang H, Maseras F, Belderrain TR, Pérez PJ, Muñiz K. Copper‐Catalyzed N−F Bond Activation for Uniform Intramolecular C−H Amination Yielding Pyrrolidines and Piperidines. Angew Chem Int Ed Engl 2019; 58:8912-8916. [DOI: 10.1002/anie.201902716] [Citation(s) in RCA: 54] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 04/16/2019] [Indexed: 11/06/2022]
Affiliation(s)
- Daniel Bafaluy
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - José María Muñoz‐Molina
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Ignacio Funes‐Ardoiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Sebastian Herold
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Adiran J. de Aguirre
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Hongwei Zhang
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
- Departament de QuímicaUniversitat Autònoma de Barcelona 08193 Bellaterra Spain
| | - Tomás R. Belderrain
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Pedro J. Pérez
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSICCIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spain
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spain
- ICREA 08010 Barcelona Spain
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96
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Bafaluy D, Muñoz‐Molina JM, Funes‐Ardoiz I, Herold S, de Aguirre A, Zhang H, Maseras F, Belderrain TR, Pérez PJ, Muñiz K. Eine Kupfer‐katalysierte N‐F‐Bindungsaktivierung für die einheitliche intramolekulare C‐H‐Aminierung zu Pyrrolidinen und Piperidinen. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201902716] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Daniel Bafaluy
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - José Maria Muñoz‐Molina
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Ignacio Funes‐Ardoiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Sebastian Herold
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Adiran de Aguirre
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Hongwei Zhang
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
- Departament de QuímicaUniversitat Autònoma de Barcelona 08193 Bellaterra Spanien
| | - Tomás R. Belderrain
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Pedro J. Pérez
- Laboratorio de Catálisis HomogéneaUnidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de QuímicaUniversidad de Huelva 21007 Huelva Spanien
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia, ICIQThe Barcelona Institute of Science and Technology Av. Països Catalans 16, 43007 Tarragona Spanien
- ICREA 08010 Barcelona Spanien
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97
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Nikolaienko P, Jentsch M, Kale AP, Cai Y, Rueping M. Electrochemical and Scalable Dehydrogenative C(sp
3
)−H Amination via Remote Hydrogen Atom Transfer in Batch and Continuous Flow. Chemistry 2019; 25:7177-7184. [DOI: 10.1002/chem.201806092] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2018] [Revised: 03/09/2019] [Indexed: 01/11/2023]
Affiliation(s)
- Pavlo Nikolaienko
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Marc Jentsch
- Institute of Organic ChemistryRWTH-Aachen University Landoltweg 1 52074 Aachen Germany
| | - Ajit P. Kale
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Yunfei Cai
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
| | - Magnus Rueping
- KAUST Catalysis Center (KCC)King Abdullah University of Science and Technology (KAUST) Thuwal 23955-6900 Saudi Arabia
- Institute of Organic ChemistryRWTH-Aachen University Landoltweg 1 52074 Aachen Germany
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98
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Zhang Y, Yin Z, Wu X. Iron‐Catalyzed Synthesis of Dihydronaphthalenones from Aromatic Oxime Esters. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201900283] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Youcan Zhang
- Leibniz-Institut für Katalyse e.V. an derUniversität Rostock Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Zhiping Yin
- Leibniz-Institut für Katalyse e.V. an derUniversität Rostock Albert-Einstein-Straße 29a 18059 Rostock Germany
| | - Xiao‐Feng Wu
- Leibniz-Institut für Katalyse e.V. an derUniversität Rostock Albert-Einstein-Straße 29a 18059 Rostock Germany
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99
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Zhang Y, Huang C, Lin X, Hu Q, Hu B, Zhou Y, Zhu G. Modular Synthesis of Alkylarylazo Compounds via Iron(III)-Catalyzed Olefin Hydroamination. Org Lett 2019; 21:2261-2264. [PMID: 30869900 DOI: 10.1021/acs.orglett.9b00540] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A novel Fe-catalyzed olefin hydroamination with aryldiazo sulfones for accessing alkylarylazo compounds has been successfully developed. Aryldiazo sulfones are used as radical acceptors, and N-N double bonds will be regenerated when an arene sulfonyl group leaves. The reaction features mild reaction conditions and a broad substrate scope, allowing access to many azo compounds that would be difficult or perhaps impossible to access using other methods.
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Affiliation(s)
- Yan Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Chenchao Huang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Xinru Lin
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Qi Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Boyue Hu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Yulu Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
| | - Gangguo Zhu
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials , Zhejiang Normal University , 688 Yingbin Road , Jinhua 321004 , China
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100
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Abstract
Owing to the pervasiveness of hydroxyl groups in natural isolates, alcohol derivatives are alluring directing groups. Herein, an alcohol-derived sulfamate ester guides the light-initiated xanthylation of primary, secondary, or tertiary centers. This process enables formal directed deuteration, azidation, thiolation, and vinylation reactions.
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Affiliation(s)
- Suraj K. Ayer
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708–0354, USA
| | - J. L. Roizen
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708–0354, USA
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