1
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Wright JS, Ma R, Webb EW, Winton WP, Stauff J, Cheng K, Brooks AF, Sanford MS, Scott PJH. Zinc-Mediated Radiosynthesis of Unprotected Fluorine-18 Labelled α-Tertiary Amides. Angew Chem Int Ed Engl 2024; 63:e202316365. [PMID: 38010255 PMCID: PMC10872995 DOI: 10.1002/anie.202316365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 11/29/2023]
Abstract
This report describes the development of a Zn(OTf)2 -mediated method for converting α-tertiary haloamides to the corresponding fluorine-18 labelled α-tertiary fluoroamides with no-carrier-added [18 F]tetramethylammonium fluoride. 1,5,7-Triazabicyclo[4.4.0]dec-5-ene is an essential additive for achieving high radiochemical conversion. Under the optimised conditions, radiofluorination proceeds at sterically hindered tertiary sites in high radiochemical conversions, yields, and purities. This method has been successfully automated and applied to access >200 mCi (>7.4 GBq) of several model radiofluorides. Mechanistic studies led to the development of a new, nucleophilic C-H radiofluorination process using N-sulphonyloxyamide substrates.
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Affiliation(s)
- Jay S Wright
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Richard Ma
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - E William Webb
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Wade P Winton
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Jenelle Stauff
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Kevin Cheng
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Allen F Brooks
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
| | - Melanie S Sanford
- Department of Chemistry, University of Michigan, Ann Arbor, MI-48109, USA
| | - Peter J H Scott
- Department of Radiology, University of Michigan, Ann Arbor, MI-48109, USA
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2
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Tsuchiya N, Nojiri T, Nishikata T. Oxazaborolidinones: Steric Coverage Effect of Lewis Acidic Boron Center in Suzuki-Miyaura Coupling Reactions. Chemistry 2023:e202303271. [PMID: 38149455 DOI: 10.1002/chem.202303271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2023] [Indexed: 12/28/2023]
Abstract
It was demonstrated that α-hydroxycarboxamide is an excellent boron-protecting group. The reaction between α-hydroxycarboxamide and organoboronic acids produced stable oxazaborolidinones (OxBs), in which thesp 2 ${{_{{\rm sp}{^{2}}}}}$ -hybridized boron atom was sterically protected by α-hydroxycarboxamide. The alkyl groups of the α-hydroxycarboxamide moiety can dynamically cover the p-orbital of thesp 2 ${{_{{\rm sp}{^{2}}}}}$ -hybridized boron center, creating a small space around the boron atom, allowing for smooth transmetalation by a Pd catalyst and easy deprotection by water. This protecting phenomenon is effective for readily purification, Suzuki-Miyaura coupling reactions with unstable boronic acids and iterative cross-couplings.
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Affiliation(s)
- Naoki Tsuchiya
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takaki Nojiri
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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3
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Feng C, Wu Y. Copper-Catalyzed Bifunctionalization/Annulation of Unactivated Alkene with Alkyl Bromides. J Org Chem 2023; 88:15249-15255. [PMID: 37862612 DOI: 10.1021/acs.joc.3c01746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2023]
Abstract
β-Lactam is a ubiquitous scaffold in bioactive compounds and pharmaceuticals. Herein, we disclose a streamlined method for the construction of β-lactams starting from unactivated alkenes and alkyl bromides via a Cu-catalyzed inter-/intramolecular carboamidation. This reaction proceeded smoothly under mild reaction conditions and exhibited a broad substrate scope and various functional groups. This protocol is not only compatible with 1, 2, and 3° alkyl bromides but also suitable for α-bromo nitrile as well as various benzyl bromides. The mechanism exploration indicated that sequential radical addition/reductive elimination was involved.
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Affiliation(s)
- Cancan Feng
- College of Chemistry, Green Catalysis Center, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
| | - Yangjie Wu
- College of Chemistry, Green Catalysis Center, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Key Laboratory of Applied Chemistry of Henan Universities, Zhengzhou University, Zhengzhou 450052, P. R. China
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4
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Chen HC, Liu CY, Angamuthu V, Chen WC, Wen CS, Hou DR. Synthesis of Optically Active Organofluorides by Ring Opening of Oxazolidinone-Fused Aziridines. Org Lett 2023; 25:190-194. [PMID: 36576235 DOI: 10.1021/acs.orglett.2c04042] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
A general method for synthesizing optically active, primary, secondary, and tertiary organofluorides was developed. This chiral pool synthesis utilized the skeleton of arabinose to generate diastereomerically pure 2-oxazolidinone-fused aziridines, which underwent ring opening with a fluoride anion. The adducts, polyoxygenated organofluorides, were useful precursors to various fluorinated compounds, such as fluorinated amino acids.
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Affiliation(s)
- Hung-Che Chen
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Chi-Yun Liu
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Venkatachalam Angamuthu
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Wei-Chen Chen
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Chi-Sheng Wen
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan, Taiwan 32001
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5
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Shimizu D, Kurose A, Nishikata T. Remote Nucleophilic Substitution at a C(sp 3)–H Bond of α-Bromocarboxamides via 1,4-Hydrogen Atom Transfer To Access N-Acyl- N, O-acetal Compounds. Org Lett 2022; 24:7873-7877. [DOI: 10.1021/acs.orglett.2c02716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Daisuke Shimizu
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Ayako Kurose
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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6
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Hirata G, Shimoharai Y, Shimada T, Nishikata T. Transition metal-free ether coupling and hydroamidation enabling the efficient synthesis of congested heterocycles. Chem Commun (Camb) 2022; 58:3665-3668. [PMID: 35224595 DOI: 10.1039/d1cc06871g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In this study, we discovered that α-bromocarboxamides react with alkynols containing tertiary alcohol moieties to produce congested ethers or heterocycles. Here, the etherification and hydroamidation reactions can be controlled by a suitable base. Both C-O and C-N bond formations occurred without a transition-metal catalyst. The stereospecific etherification and cyclization of diastereo-enriched α-bromocarboxamide afforded the corresponding diastereo-enriched ether and heterocyclic compound.
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Affiliation(s)
- Goki Hirata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Yusuke Shimoharai
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Taisei Shimada
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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7
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Qian BY, Zhang W, Lin J, Cao W, Xiao JC. anti-Markovnikov Iodofluorination of Alkenes. Chem Asian J 2022; 17:e202200184. [PMID: 35266316 DOI: 10.1002/asia.202200184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Revised: 03/09/2022] [Indexed: 11/10/2022]
Abstract
The fluorination of alkenes with electrophilic N-F type reagents usually occurs through a Markovnikov-type addition, and the anti-Markovnikov-type addition may require the use of a transition metal catalyst or an expensive catalyst. Herein we describe a convenient anti-Markovnikov iodofluorination of alkenes with Selectfluor/ nBu4NI. A wide substrate scope and good functional group tolerance were observed. The process allows for the construction of various C-F bonds, especially tertiary C-F bonds. The remarkable features make this protocol attractive, including convenient operations, simple reaction conditions, and the installation of an iodine atom which provides possibilities for further transformations.
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Affiliation(s)
- Bai-Yu Qian
- Shanghai University, Department of Chemistry, CHINA
| | - Wei Zhang
- Shanghai University, Department of Chemistry, CHINA
| | - Jinhong Lin
- Shanghai Institute of Organic Chemistry, Key Laboratory of Organofluorine Chemistry, 345 Lingling Road, 200032, Shanghai, CHINA
| | - Weiguo Cao
- Shanghai University, Department of Chemistry, CHINA
| | - Ji-Chang Xiao
- SIOC: Shanghai Institute of Organic Chemistry, Key Laboratory of Organofluorine Chemistry, CHINA
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8
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Zhang G, Wang H, Wu W, Fan Q, Ding C. SO
2
F
2
‐Promoted Dehydroxylative Fluorination of Alcohols. ChemistrySelect 2022. [DOI: 10.1002/slct.202104114] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Guofu Zhang
- Department College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Huimin Wang
- Department College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Wenliang Wu
- Zhejiang Jitai New Materials Co. Ltd. Shao Xing Shi, Shangyu 312369 P. R. China
| | - Qiankun Fan
- Department College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
| | - Chengrong Ding
- Department College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
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9
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Liu A, Ni C, Xie Q, Hu J. TMSCF
2
Br‐Enabled Fluorination–Aminocarbonylation of Aldehydes: Modular Access to α‐Fluoroamides. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202115467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- An Liu
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China
| | - Qiqiang Xie
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry Center for Excellence in Molecular Synthesis Shanghai Institute of Organic Chemistry University of Chinese Academy of Sciences Chinese Academy of Sciences 345 Ling-Ling Road Shanghai 200032 China
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10
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Liu A, Ni C, Xie Q, Hu J. TMSCF 2 Br-Enabled Fluorination-Aminocarbonylation of Aldehydes: Modular Access to α-Fluoroamides. Angew Chem Int Ed Engl 2021; 61:e202115467. [PMID: 34919312 DOI: 10.1002/anie.202115467] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2021] [Indexed: 01/03/2023]
Abstract
A protocol for the modular assembly of the α-fluoroamide motif has been developed, which provides a practical method for the efficient synthesis of structurally diverse α-fluoroamides from easily available aldehydes and tertiary amines through a three-component fluorination-aminocarbonylation process. The key to the success of this process is taking advantage of the multiple roles of the unique difluorocarbene reagent TMSCF2 Br (TMS=trimethylsilyl). The mechanism of the process involves the 1,2-fluorine and oxygen migrations of the in situ formed TMS-protected α-aminodifluoromethyl carbinol intermediates, which represents a new type of deoxyfluorination reaction.
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Affiliation(s)
- An Liu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, China
| | - Chuanfa Ni
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, China
| | - Qiqiang Xie
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, China
| | - Jinbo Hu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Ling-Ling Road, Shanghai, 200032, China
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11
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12
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Mizuta S, Kitamura K, Kitagawa A, Yamaguchi T, Ishikawa T. Silver-Promoted Fluorination Reactions of α-Bromoamides. Chemistry 2021; 27:5930-5935. [PMID: 33274783 DOI: 10.1002/chem.202004769] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 12/03/2020] [Indexed: 01/18/2023]
Abstract
Silver-promoted C-F bond formation in α-bromoamides by using AgF under mild conditions is reported. This simple method enables access to tertiary, secondary, and primary alkyl fluorides involving biomolecular scaffolds. This transformation is applicable to primary and secondary amides and shows broad functional-group tolerance. Kinetics experiments revealed that the reaction rate increased in the order of 3°>2°>1° α-carbon atom. In addition, it was found that the acidic amide proton plays an important role in accelerating the reaction. Mechanistic studies suggested generation of an aziridinone intermediate that undergoes subsequent nucleophilic addition to form the C-F bond with stereospecificity (i.e., retention of configuration). The synthesis of sterically hindered alcohols and ethers by using AgI is also demonstrated. Examples of reactions of α-bromoamides with O nucleophiles are presented.
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Affiliation(s)
- Satoshi Mizuta
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo, Nagasaki, 852-8521, Japan
| | - Kanami Kitamura
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo, Nagasaki, 852-8521, Japan
| | - Ayako Kitagawa
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo, Nagasaki, 852-8521, Japan
| | - Tomoko Yamaguchi
- Graduate School of Biomedical Sciences, Nagasaki University, 1-14 Bunkyo, Nagasaki, 852-8521, Japan
| | - Takeshi Ishikawa
- Department of Chemistry, Biotechnology and Chemical Engineering, Graduate School of Science and Engineering, Kagoshima University, 1-21-40 Korimoto, Kagoshima, 890-0065, Japan
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13
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Yu YJ, Zhang FL, Peng TY, Wang CL, Cheng J, Chen C, Houk KN, Wang YF. Sequential C-F bond functionalizations of trifluoroacetamides and acetates via spin-center shifts. Science 2021; 371:1232-1240. [PMID: 33674411 DOI: 10.1126/science.abg0781] [Citation(s) in RCA: 134] [Impact Index Per Article: 44.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 02/09/2021] [Indexed: 12/21/2022]
Abstract
Defluorinative functionalization of readily accessible trifluoromethyl groups constitutes an economical route to partially fluorinated molecules. However, the controllable replacement of one or two fluorine atoms while maintaining high chemoselectivity remains a formidable challenge. Here we describe a general strategy for sequential carbon-fluorine (C-F) bond functionalizations of trifluoroacetamides and trifluoroacetates. The reaction begins with the activation of a carbonyl oxygen atom by a 4-dimethylaminopyridine-boryl radical, followed by a spin-center shift to trigger the C-F bond scission. A chemoselectivity-controllable two-stage process enables sequential generation of difluoro- and monofluoroalkyl radicals, which are selectively functionalized with different radical traps to afford diverse fluorinated products. The reaction mechanism and the origin of chemoselectivity were established by experimental and computational approaches.
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Affiliation(s)
- You-Jie Yu
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Feng-Lian Zhang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Tian-Yu Peng
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Chang-Ling Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Jie Cheng
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Chen Chen
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Kendall N Houk
- Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
| | - Yi-Feng Wang
- Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui 230026, China.,Center for Excellence in Molecular Synthesis of CAS, Hefei, Anhui 230026, China.,State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin 300071, China
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14
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Abstract
A large number of fluorination methods have been developed, but the construction of a tertiary C-F bond remains challenging. Herein, we describe an efficient dehydroxylative fluorination of tertiary alcohols with Selectfluor via the activation of a hydroxyl group by a Ph2PCH2CH2PPh2/ICH2CH2I system. Although the reagents appear to be not compatible (Selectfluor with the phosphine and I- generated in situ), the reactions occur rapidly to give the desired products in moderate to high yields. This work may present a new discovery in fluorination of alcohols since the reported methods are mainly limited to primary and secondary alcohols.
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Affiliation(s)
- Wei Zhang
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Yu-Cheng Gu
- Syngenta, Jealott's Hill International Research Centre, Bracknell, Berkshire RG426EY, U.K
| | - Jin-Hong Lin
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
| | - Ji-Chang Xiao
- Key Laboratory of Organofluorine Chemistry, Shanghai Institute of Organic Chemistry, University of Chinese Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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15
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Liu M, Zhang Z, Liu H, Wu T, Han B. Dehydroxyalkylative halogenation of C(aryl)-C bonds of aryl alcohols. Chem Commun (Camb) 2020; 56:7120-7123. [PMID: 32458843 DOI: 10.1039/d0cc02306j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
We herein report Cu mediated side-directed dehydroxyalkylative halogenation of aryl alcohols. C(aryl)-C bonds of aryl alcohols were effectively cleaved, affording the corresponding aryl chlorides, bromides and iodides in excellent yields. Aryl alcohols could serve as both aromatic electrophilic and radical synthetic equivalents during the reaction.
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Affiliation(s)
- Mingyang Liu
- Beijing National Laboratory for Molecular Science, CAS Key Laboratory of Colloid and Interface and Thermodynamics, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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16
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Hirata G, Yamane Y, Tsubaki N, Hara R, Nishikata T. Controlling alkyne reactivity by means of a copper-catalyzed radical reaction system for the synthesis of functionalized quaternary carbons. Beilstein J Org Chem 2020; 16:502-508. [PMID: 32273910 PMCID: PMC7113556 DOI: 10.3762/bjoc.16.45] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Accepted: 03/13/2020] [Indexed: 01/06/2023] Open
Abstract
A terminal alkyne is one of the most useful reactants for the synthesis of alkyne and alkene derivatives. Because an alkyne undergoes addition reaction at a C-C triple bond or cross-coupling at a terminal C-H bond. Combining those reaction patterns could realize a new reaction methodology to synthesize complex molecules including C-C multiple bonds. In this report, we found that the reaction of 3 equivalents of terminal alkyne 1 (aryl substituted alkyne) and an α-bromocarbonyl compound 2 (tertiary alkyl radical precursor) undergoes tandem alkyl radical addition/Sonogashira coupling to produce 1,3-enyne compound 3 possessing a quaternary carbon in the presence of a copper catalyst. Moreover, the reaction of α-bromocarbonyl compound 2 and an alkyne 4 possessing a carboxamide moiety undergoes tandem alkyl radical addition/C-H coupling to produce indolinone derivative 5.
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Affiliation(s)
- Goki Hirata
- Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Yu Yamane
- Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Naoya Tsubaki
- Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Reina Hara
- Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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17
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Fantinati A, Zanirato V, Marchetti P, Trapella C. The Fascinating Chemistry of α-Haloamides. ChemistryOpen 2020; 9:100-170. [PMID: 32025460 PMCID: PMC6996577 DOI: 10.1002/open.201900220] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Revised: 11/19/2019] [Indexed: 12/17/2022] Open
Abstract
The aim of this review is to highlight the rich chemistry of α-haloamides originally mainly used to discover new C-N, C-O and C-S bond forming reactions, and later widely employed in C-C cross-coupling reactions with C(sp3), C(sp2) and C(sp) coupling partners. Radical-mediated transformations of α-haloamides bearing a suitable located unsaturated bond has proven to be a straightforward alternative to access diverse cyclic compounds by means of either radical initiators, transition metal redox catalysis or visible light photoredox catalysis. On the other hand, cycloadditions with α-halohydroxamate-based azaoxyallyl cations have garnered significant attention. Moreover, in view of the important role in life and materials science of difluoroalkylated compounds, a wide range of catalysts has been developed for the efficient incorporation of difluoroacetamido moieties into activated as well as unactivated substrates.
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Affiliation(s)
- Anna Fantinati
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Vinicio Zanirato
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Paolo Marchetti
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
| | - Claudio Trapella
- Department of Chemical and Pharmaceutical SciencesUniversity of Ferrara, Via Fossato di Mortara 1744121FerraraItaly E-mail: V. Zanirato
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18
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Miwa N, Tanaka C, Ishida S, Hirata G, Song J, Torigoe T, Kuninobu Y, Nishikata T. Copper-Catalyzed Tertiary Alkylative Cyanation for the Synthesis of Cyanated Peptide Building Blocks. J Am Chem Soc 2020; 142:1692-1697. [PMID: 31939289 DOI: 10.1021/jacs.9b11349] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In this paper, we report efficient cyanation of various peptides containing the α-bromocarbonyl moiety using a Cu-catalyzed radical-based methodology employing zinc cyanide as the cyanide source. Mechanistic studies revealed that in situ formed CuCN was a key intermediate during the catalytic cycle. Our method could be useful for the synthesis of modified peptides containing quaternary carbons.
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Affiliation(s)
- Naoki Miwa
- Graduate School of Science and Engineering , Yamaguchi University , 2-16-1 Tokiwadai , Ube , Yamaguchi 755-8611 , Japan
| | - Chihiro Tanaka
- Graduate School of Science and Engineering , Yamaguchi University , 2-16-1 Tokiwadai , Ube , Yamaguchi 755-8611 , Japan
| | - Syo Ishida
- Graduate School of Science and Engineering , Yamaguchi University , 2-16-1 Tokiwadai , Ube , Yamaguchi 755-8611 , Japan
| | - Goki Hirata
- Graduate School of Science and Engineering , Yamaguchi University , 2-16-1 Tokiwadai , Ube , Yamaguchi 755-8611 , Japan
| | - Jizhou Song
- Interdisciplinary Graduate School of Engineering Sciences , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Takeru Torigoe
- Interdisciplinary Graduate School of Engineering Sciences , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan.,Institute for Materials Chemistry and Engineering , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Yoichiro Kuninobu
- Interdisciplinary Graduate School of Engineering Sciences , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan.,Institute for Materials Chemistry and Engineering , Kyushu University , 6-1 Kasugakoen , Kasuga , Fukuoka 816-8580 , Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering , Yamaguchi University , 2-16-1 Tokiwadai , Ube , Yamaguchi 755-8611 , Japan
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19
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20
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Takeuchi K, Murata Y, Hirata G, Sheppard TD, Nishikata T. Hybrid Reaction Systems for the Synthesis of Alkylated Compounds Based upon Cu-Catalyzed Coupling of Radicals and Organometallic Species. CHEM REC 2019; 20:403-412. [PMID: 31556485 DOI: 10.1002/tcr.201900053] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/04/2019] [Accepted: 09/13/2019] [Indexed: 12/21/2022]
Abstract
A transition metal catalyzed alkylation with an alkyl halide is one of the most difficult reactions to achieve, because of the difficult oxidative addition of an alkyl-halogen bond to a metal, and the tendency of the resulting alkylmetal intermediate to undergo a β-hydride elimination reaction to give an olefin. In this review, we discuss hybrid reaction systems involving Cu catalyzed combination of radicals and organometallic species, which enable facile alkylation reactions to construct C-C and C-heteroatom bonds. This paper highlights recent progress in arylation, alkenylation, alkynylation, cyclization, addition and introduction of heteroatoms via these hybrid reaction systems.
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Affiliation(s)
- Kentaro Takeuchi
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Yumi Murata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Goki Hirata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Tom D Sheppard
- Department of Chemistry, University College London, Christopher Ingold Laboratories, 20 Gordon Street, London, WC1H 0AJ, U.K
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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21
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Li X, Shi X, Li X, Shi D. Recent advances in transition-metal-catalyzed incorporation of fluorine-containing groups. Beilstein J Org Chem 2019; 15:2213-2270. [PMID: 31598178 PMCID: PMC6774084 DOI: 10.3762/bjoc.15.218] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 09/03/2019] [Indexed: 01/24/2023] Open
Abstract
Fluorine chemistry plays an increasingly important role in pharmaceutical, agricultural, and materials industries. The incorporation of fluorine-containing groups into organic molecules can improve their chemical and physical properties, which attracts continuous interest in organic synthesis. Among various reported methods, transition-metal-catalyzed fluorination/fluoroalkylation has emerged as a powerful method for the construction of these compounds. This review attempts to describe the major advances in the transition-metal-catalyzed incorporation of fluorine, trifluoromethyl, difluoromethyl, trifluoromethylthio, and trifluoromethoxy groups reported between 2011 and 2019.
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Affiliation(s)
- Xiaowei Li
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiaolin Shi
- Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, 7 Nanhai Road, Qingdao 266071, China.,Laboratory for Marine Drugs and Bioproducts of Qingdao National Laboratory for Marine Science and Technology, Qingdao 266000, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xiangqian Li
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
| | - Dayong Shi
- State Key Laboratory of Microbial Technology, Shandong University, 72 Binhai Road, Qingdao 266237, China
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22
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Tsuchiya N, Nishikata T. Construction of Vicinal Quaternary Carbons via Cu-catalyzed Dearomative Radical Addition. CHEM LETT 2019. [DOI: 10.1246/cl.190247] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Affiliation(s)
- Naoki Tsuchiya
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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23
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Murata Y, Takeuchi K, Nishikata T. The synthetic protocol for α-bromocarbonyl compounds via brominations. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.03.048] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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Zhu L, Xiong J, An J, Chen N, Xue J, Jiang X. Highly efficient regio-selective ring-opening nucleophilic fluorination of aziridines and azetidines: access to β- or γ-fluorinated amino acid derivatives. Org Biomol Chem 2019; 17:3797-3804. [PMID: 30916695 DOI: 10.1039/c9ob00172g] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we have presented a facile and efficient method of ring-opening nucleophilic fluorination of aziridines, affording highly regio-selective β-fluorinated amines. Firstly, the example of ring-opening hydrofluorination of azetidines was reported. Then, the Olah's reagent also provided a promising method for the construction of enantioenriched β-fluoro-α-amino acid derivatives, which could be used for the preparation of peptide-based bioactive molecules.
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Affiliation(s)
- Liping Zhu
- School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou, Guangdong 510006, China.
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25
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Nishikata T. The Technology of Functionalized Tertiary-alkylations by Using the Reaction Field Near Copper Center. J SYN ORG CHEM JPN 2019. [DOI: 10.5059/yukigoseikyokaishi.77.120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takashi Nishikata
- Graduate School of Sciences and Technology for Innovation, Yamaguchi University
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26
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Trammell R, Rajabimoghadam K, Garcia-Bosch I. Copper-Promoted Functionalization of Organic Molecules: from Biologically Relevant Cu/O 2 Model Systems to Organometallic Transformations. Chem Rev 2019; 119:2954-3031. [PMID: 30698952 DOI: 10.1021/acs.chemrev.8b00368] [Citation(s) in RCA: 157] [Impact Index Per Article: 31.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Copper is one of the most abundant and less toxic transition metals. Nature takes advantage of the bioavailability and rich redox chemistry of Cu to carry out oxygenase and oxidase organic transformations using O2 (or H2O2) as oxidant. Inspired by the reactivity of these Cu-dependent metalloenzymes, chemists have developed synthetic protocols to functionalize organic molecules under enviormentally benign conditions. Copper also promotes other transformations usually catalyzed by 4d and 5d transition metals (Pd, Pt, Rh, etc.) such as nitrene insertions or C-C and C-heteroatom coupling reactions. In this review, we summarized the most relevant research in which copper promotes or catalyzes the functionalization of organic molecules, including biological catalysis, bioinspired model systems, and organometallic reactivity. The reaction mechanisms by which these processes take place are discussed in detail.
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Affiliation(s)
- Rachel Trammell
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
| | | | - Isaac Garcia-Bosch
- Department of Chemistry , Southern Methodist University , Dallas , Texas 75275 , United States
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27
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Hajra S, Roy S, Maity S, Chatterjee S. Reagent-Controlled Reversal of Regioselectivity in Nucleophilic Fluorination of Spiro-epoxyoxindole: Synthesis of 3-Fluoro-3-hydroxymethyloxindole and 3-Aryl-3-fluoromethyloxindole. J Org Chem 2019; 84:2252-2260. [DOI: 10.1021/acs.joc.9b00059] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Saumen Hajra
- Center of Biomedical Research, Sanjay Gandhi Post-Graduate
Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
| | - Sayan Roy
- Center of Biomedical Research, Sanjay Gandhi Post-Graduate
Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
| | - Subrata Maity
- Center of Biomedical Research, Sanjay Gandhi Post-Graduate
Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Sandip Chatterjee
- Center of Biomedical Research, Sanjay Gandhi Post-Graduate
Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
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28
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Xu R, Cai C. Three-component difluoroalkylation–thiolation of alkenes by iron-facilitated visible-light photoredox catalysis. Chem Commun (Camb) 2019; 55:4383-4386. [DOI: 10.1039/c9cc00730j] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first difluoroalkylation–thiolation of alkenes catalyzed by iron-facilitated photoredox has been developed with a broad substrate scope under mild conditions.
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Affiliation(s)
- Rui Xu
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
| | - Chun Cai
- Chemical Engineering College
- Nanjing University of Science and Technology
- Nanjing 210094
- People's Republic of China
- Key Laboratory of Organofluorine Chemistry
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29
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Hajra S, Hazra A, Mandal P. Stereocontrolled Nucleophilic Fluorination at the Tertiary sp3-Carbon Center for Enantiopure Synthesis of 3-Fluorooxindoles. Org Lett 2018; 20:6471-6475. [DOI: 10.1021/acs.orglett.8b02777] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Saumen Hajra
- Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
| | - Atanu Hazra
- Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
| | - Paltu Mandal
- Centre of Biomedical Research, Sanjay Gandhi Postgraduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow 226014, India
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30
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Zhou Z, Behnke NE, Kürti L. Copper-Catalyzed Synthesis of Hindered Ethers from α-Bromo Carbonyl Compounds. Org Lett 2018; 20:5452-5456. [PMID: 30113173 PMCID: PMC7802898 DOI: 10.1021/acs.orglett.8b02371] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A catalytic method for the synthesis of sterically hindered ethers and thioethers from α-bromo carbonyl compounds and the corresponding nucleophiles using an inexpensive Cu(I) catalytic system is reported. This facile transformation takes place at ambient temperature and does not require the exclusion of air or moisture; thus, it is well-suited for the functionalization and derivatization of complex organic molecules.
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Affiliation(s)
| | | | - László Kürti
- Department of Chemistry, Rice University BioScience Research
Collaborative 6500 Main Street, Rm 380, Houston, TX 77030 (USA)
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31
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Nakamura K, Hara R, Sunada Y, Nishikata T. Radical-Organometallic Hybrid Reaction System Enabling Couplings between Tertiary-Alkyl Groups and 1-Alkenyl Groups. ACS Catal 2018. [DOI: 10.1021/acscatal.8b01572] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Kimiaki Nakamura
- Graduate School of Science and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Reina Hara
- Graduate School of Science and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Yusuke Sunada
- Institute of Industrial Science, The University of Tokyo, 4-6-1 Komaba Meguro-ku, Tokyo 153-8505, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
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32
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Liu Z, Chen H, Lv Y, Tan X, Shen H, Yu HZ, Li C. Radical Carbofluorination of Unactivated Alkenes with Fluoride Ions. J Am Chem Soc 2018; 140:6169-6175. [DOI: 10.1021/jacs.8b03077] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Zhonglin Liu
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - He Chen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Ying Lv
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Xinqiang Tan
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Haigen Shen
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Hai-Zhu Yu
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials, Anhui University, Hefei, Anhui 230601, P. R. China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
- School of Materials and Chemical Engineering, Ningbo University of Technology, No. 201 Fenghua Road, Ningbo 315211, P. R. China
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33
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Murata Y, Nishikata T. Facile Synthesis of Single α-tert-Alkylated Acetaldehydes by Hydroxyalkylation of Enamides in Aqueous Solution. Chemistry 2018; 24:6354-6357. [PMID: 29498461 DOI: 10.1002/chem.201801065] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Indexed: 01/31/2023]
Abstract
In this work, we established a general protocol to synthesize single α-tert-alkylated acetaldehydes via Cu-catalyzed hydroxyalkylation of enamides in aqueous solutions. The yields of the products were very high and there was excellent functional group compatibility. Our reaction allows easy access to highly functionalized acetaldehydes that can be used to synthesize further useful compounds including spirocycles. The control experiments revealed that this reaction includes hydroxyalkylation processes via radical reactions.
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Affiliation(s)
- Yumi Murata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi, 755-8611, Japan
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34
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Hsieh MT, Lee KH, Kuo SC, Lin HC. Lewis acid-mediated defluorinative [3+2] cycloaddition/aromatization cascade of 2,2-difluoroethanol systems with nitriles. Adv Synth Catal 2018. [DOI: 10.1002/adsc.201701581] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Min-Tsang Hsieh
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
- Chinese Medicinal Research and Development Center; China Medical University Hospital; Taiwan, R.O.C
- Natural Products Research Laboratories; UNC Eshelman School of Pharmacy; University of North Carolina; Chapel Hill, NC 27599 United States
| | - Kuo-Hsiung Lee
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
- Chinese Medicinal Research and Development Center; China Medical University Hospital; Taiwan, R.O.C
| | - Sheng-Chu Kuo
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
| | - Hui-Chang Lin
- School of Pharmacy; China Medical University; Taichung 404 Taiwan, R.O.C
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35
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36
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Liu W, Huang X, Placzek MS, Krska SW, McQuade P, Hooker JM, Groves JT. Site-selective 18F fluorination of unactivated C-H bonds mediated by a manganese porphyrin. Chem Sci 2017; 9:1168-1172. [PMID: 29675161 PMCID: PMC5885592 DOI: 10.1039/c7sc04545j] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/02/2017] [Indexed: 12/28/2022] Open
Abstract
A direct aliphatic C–H 18F labeling method using [18F]fluoride ion at inaccessible and unreactive sites is reported.
The first direct C–H 18F fluorination reaction of unactivated aliphatic sites using no-carrier-added [18F]fluoride is reported. Under the influence of a manganese porphyrin/iodosylbenzene system, a variety of unactivated aliphatic C–H bonds can be selectively converted to C–18F bonds. The mild conditions, broad substrate scope and generally inaccessible regiochemistry make this radio-fluorination a powerful alternate to established nucleophilic substitution for the preparation of 18F labeled radio tracers.
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Affiliation(s)
- Wei Liu
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , USA .
| | - Xiongyi Huang
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , USA .
| | - Michael S Placzek
- Athinoula A. Martinos Center for Biomedical Imaging , Massachusetts General Hospital , Harvard Medical School , Charlestown , Massachusetts 02129 , USA . .,Division of Nuclear Medicine and Molecular Imaging , Department of Radiology , Massachusetts General Hospital , Boston , Massachusetts 02114 , USA
| | - Shane W Krska
- Department of Process Chemistry , Merck Research Laboratories , Rahway , New Jersey 07065 , USA
| | - Paul McQuade
- Imaging Research , Merck Research Laboratories , West Point , Pennsylvania 19486 , USA
| | - Jacob M Hooker
- Athinoula A. Martinos Center for Biomedical Imaging , Massachusetts General Hospital , Harvard Medical School , Charlestown , Massachusetts 02129 , USA . .,Division of Nuclear Medicine and Molecular Imaging , Department of Radiology , Massachusetts General Hospital , Boston , Massachusetts 02114 , USA
| | - John T Groves
- Department of Chemistry , Princeton University , Princeton , New Jersey 08544 , USA .
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37
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Chen H, Liu Z, Lv Y, Tan X, Shen H, Yu HZ, Li C. Selective Radical Fluorination of Tertiary Alkyl Halides at Room Temperature. Angew Chem Int Ed Engl 2017; 56:15411-15415. [DOI: 10.1002/anie.201708197] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Revised: 09/27/2017] [Indexed: 11/10/2022]
Affiliation(s)
- He Chen
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Zhonglin Liu
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Ying Lv
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 P. R. China
| | - Xinqiang Tan
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Haigen Shen
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
| | - Hai-Zhu Yu
- AnHui Province Key Laboratory of Chemistry for Inorganic/Organic Hybrid Functionalized Materials; Anhui University; Hefei Anhui 230601 P. R. China
| | - Chaozhong Li
- Key Laboratory of Organofluorine Chemistry and Collaborative Innovation Center of Chemistry for Life Sciences; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Lingling Road Shanghai 200032 P. R. China
- School of Materials and Chemical Engineering; Ningbo University of Technology; 201 Fenghua Road Ningbo 315211 P. R. China
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38
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39
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Chen C, Fu L, Chen P, Liu G. Recent Advances and Perspectives of Transition Metal-Catalyzed Asymmetric Fluorination Reactions. CHINESE J CHEM 2017. [DOI: 10.1002/cjoc.201700489] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Chaohuang Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; University of Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
| | - Liang Fu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; University of Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
| | - Pinhong Chen
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; University of Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
| | - Guosheng Liu
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences; University of Chinese Academy of Sciences; 345 Lingling Road, Shanghai 200032 China
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40
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Yamane Y, Miwa N, Nishikata T. Copper-Catalyzed Functionalized Tertiary-Alkylative Sonogashira Type Couplings via Copper Acetylide at Room Temperature. ACS Catal 2017. [DOI: 10.1021/acscatal.7b02615] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Yu Yamane
- Graduate School of Science
and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Naoki Miwa
- Graduate School of Science
and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science
and Engineering, Yamaguchi University, Ube, Yamaguchi 755-8611, Japan
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41
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Ishida S, Takeuchi K, Taniyama N, Sunada Y, Nishikata T. Copper-Catalyzed Amination of Congested and Functionalized α-Bromocarboxamides with either Amines or Ammonia at Room Temperature. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201706293] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Syo Ishida
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Kentaro Takeuchi
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Nobuhiro Taniyama
- Institute of Industrial Science; The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Yusuke Sunada
- Institute of Industrial Science; The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
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42
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Ishida S, Takeuchi K, Taniyama N, Sunada Y, Nishikata T. Copper-Catalyzed Amination of Congested and Functionalized α-Bromocarboxamides with either Amines or Ammonia at Room Temperature. Angew Chem Int Ed Engl 2017; 56:11610-11614. [DOI: 10.1002/anie.201706293] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Indexed: 11/10/2022]
Affiliation(s)
- Syo Ishida
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Kentaro Takeuchi
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
| | - Nobuhiro Taniyama
- Institute of Industrial Science; The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Yusuke Sunada
- Institute of Industrial Science; The University of Tokyo; 4-6-1 Komaba Meguro-ku Tokyo 153-8505 Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering; Yamaguchi University; 2-16-1 Tokiwadai Ube Yamaguchi 755-8611 Japan
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43
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Takeuchi K, Ishida S, Nishikata T. Dichloromethane as a Chlorination Reagent for α-Bromocarbonyl Compounds in the Presence of a Copper Catalyst. CHEM LETT 2017. [DOI: 10.1246/cl.170062] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Kentaro Takeuchi
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
| | - Syo Ishida
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
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44
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Wada M, Noda Y, Nishikata T. Exchanging Alkyl Groups through Unstrained C−C Bond Cleavage in the Presence of a Copper Catalyst. Chem Asian J 2017; 12:978-981. [DOI: 10.1002/asia.201700239] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Revised: 03/13/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Masaru Wada
- Graduate School of Science and Engineering; Yamaguchi University; Ube 755-8611 Japan
| | - Yushi Noda
- Graduate School of Science and Engineering; Yamaguchi University; Ube 755-8611 Japan
| | - Takashi Nishikata
- Graduate School of Science and Engineering; Yamaguchi University; Ube 755-8611 Japan
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45
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Miwa N, Yamane Y, Nishikata T. A Ligand Containing Five Nitrogen Atoms Enabled Efficient Homocyclization of α-Bromocarbonyl Amides in the Presence of a Copper Catalyst. CHEM LETT 2017. [DOI: 10.1246/cl.170039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Naoki Miwa
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
| | - Yu Yamane
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
| | - Takashi Nishikata
- Graduate School of Science and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611
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46
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Yang B, Chansaenpak K, Wu H, Zhu L, Wang M, Li Z, Lu H. Silver-promoted (radio)fluorination of unsaturated carbamates via a radical process. Chem Commun (Camb) 2017; 53:3497-3500. [PMID: 28280814 DOI: 10.1039/c7cc01393k] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The intramolecular fluorocyclization of unsaturated carbamates is described here using a hypervalent iodine reagent in the presence of a silver catalyst. Both (hetero)aryl-substituted olefins and acrylamides can be utilized as effective substrates. Preliminary mechanistic investigations suggest that the reaction proceeds via a cyclization/1,2-(hetero)aryl migration/fluorination cascade involving an unusual radical process. Furthermore, starting from no-carrier-added [18F]TBAF, a simple one-pot, two-step cascade method was developed for the generation of 18F-labeled heterocycles with high radiochemical purity.
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Affiliation(s)
- Bin Yang
- Institute of Chemistry & BioMedical Sciences, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.
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47
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Nakamura K, Nishikata T. Tandem Reactions Enable Trans- and Cis-Hydro-Tertiary-Alkylations Catalyzed by a Copper Salt. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03343] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Kimiaki Nakamura
- Graduate School of Science
and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science
and Engineering, Yamaguchi University 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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48
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Wang L, Jiang X, Tang P. Silver-mediated fluorination of alkyl iodides with TMSCF3 as the fluorinating agent. Org Chem Front 2017. [DOI: 10.1039/c7qo00450h] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The first example of a silver-mediated fluorination of alkyl iodides with the Ruppert–Prakash reagent (TMSCF3) as the fluorinating agent is reported.
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Affiliation(s)
- Liyan Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Xiaohuan Jiang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
| | - Pingping Tang
- State Key Laboratory and Institute of Elemento-Organic Chemistry
- Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)
- Nankai University
- Tianjin 300071
- China
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49
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Yamane Y, Miyazaki K, Nishikata T. Different Behaviors of a Cu Catalyst in Amine Solvents: Controlling N and O Reactivities of Amide. ACS Catal 2016. [DOI: 10.1021/acscatal.6b02309] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Yamane
- Graduate School of Science
and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Koichiro Miyazaki
- Graduate School of Science
and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
| | - Takashi Nishikata
- Graduate School of Science
and Engineering, Yamaguchi University, 2-16-1 Tokiwadai, Ube, Yamaguchi 755-8611, Japan
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