1
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Kanemoto K, Yoshimura K, Ono K, Ding W, Ito S, Yoshikai N. Amino- and Alkoxybenziodoxoles: Facile Preparation and Use as Arynophiles. Chemistry 2024; 30:e202400894. [PMID: 38494436 DOI: 10.1002/chem.202400894] [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: 03/08/2024] [Revised: 03/15/2024] [Accepted: 03/15/2024] [Indexed: 03/19/2024]
Abstract
We report here on the facile synthesis of amino- and alkoxy-λ3-iodanes supported by a benziodoxole (BX) template and their use as arynophiles. The amino- and alkoxy-BX derivatives can be readily synthesized by reacting the respective amines or alcohols with chlorobenziodoxole in the presence of a suitable base. Unlike previously known nitrogen- and oxygen-bound iodane compounds, which have primarily been employed as electrophilic group transfer agents or oxidants, the present amino- and alkoxy-BX reagents manifest themselves as nucleophilic amino and alkoxy transfer agents toward arynes. This reactivity leads to the aryne insertion into the N-I(III) or O-I(III) bond to afford ortho-amino- and ortho-alkoxy-arylbenziodoxoles, iodane compounds nontrivial to procure by existing methods. The BX group in these insertion products exhibits excellent leaving group ability, enabling diverse downstream transformations.
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Affiliation(s)
- Kazuya Kanemoto
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Ken Yoshimura
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Koki Ono
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
| | - Wei Ding
- College of Chemistry, Henan Institute of Advanced Technology, Zhengzhou University, Zhengzhou, 450001, P.R. China
| | - Shingo Ito
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 21 Nanyang Link, Singapore, 637371, Singapore
| | - Naohiko Yoshikai
- Graduate School of Pharmaceutical Sciences, Tohoku University, 6-3 Aoba, Aramaki, Aoba-ku, Sendai, 980-8578, Japan
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2
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Li M, Feng Z, Duan C, Zhang T, Shi Y. Confinement Effect in Metal-Organic Framework Cu 3( BTC) 2 for Enhancing Shape Selectivity of Radical Difunctionalization of Alkenes. ACS OMEGA 2024; 9:14233-14240. [PMID: 38559924 PMCID: PMC10976352 DOI: 10.1021/acsomega.3c09911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 02/23/2024] [Accepted: 02/29/2024] [Indexed: 04/04/2024]
Abstract
The radical difunctionalization of alkenes plays a vital role in pharmacy, but the conventional homogeneous catalytic systems are challenging in selectivity and sustainability to afford the target molecules. Herein, the famous readily available metal-organic framework (MOF), Cu3(BTC)2, has been applied to cyano-trifluoromethylation of alkenes as a high-performance and recyclable heterogeneous catalyst, which possesses copper(II) active sites residing in funnel-like cavities. Under mild conditions, styrene derivatives and various unactivated olefins could be smoothly transformed into the corresponding cyano-trifluoromethylation products. Moreover, the transformation brought about by the active copper center in confined environments achieved regio- and shape selectivity. To understand the enhanced selectivity, the activation manner of the MOF catalyst was studied with control catalytic experiments such as FT-IR and UV-vis absorption spectroscopy of substrate-incorporated Cu3(BTC)2, which elucidated that the catalyst underwent a radical transformation with the intermediates confined in the MOF cavity, and the confinement effect endowed the method with pronounced selectivities.
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Affiliation(s)
- Mochen Li
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering,
School of Chemistry, Dalian University of
Technology, Dalian 116024, P. R. China
| | - Zhi Feng
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering,
School of Chemistry, Dalian University of
Technology, Dalian 116024, P. R. China
| | - Chunying Duan
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering,
School of Chemistry, Dalian University of
Technology, Dalian 116024, P. R. China
- State
Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210023, P. R. China
| | - Tiexin Zhang
- State
Key Laboratory of Fine Chemicals, School of Chemical Engineering,
School of Chemistry, Dalian University of
Technology, Dalian 116024, P. R. China
| | - Yusheng Shi
- Jiangsu
Yangnong Chemical Group Co., Ltd., Yangzhou 225001, P. R. China
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3
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Okumatsu D, Kiyokawa K, Bao Nguyen LT, Abe M, Minakata S. Photoexcitation of (diarylmethylene)amino benziodoxolones for alkylamination of styrene derivatives with carboxylic acids. Chem Sci 2024; 15:1068-1076. [PMID: 38239691 PMCID: PMC10793594 DOI: 10.1039/d3sc06090j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 12/12/2023] [Indexed: 01/22/2024] Open
Abstract
The alkylamination of alkenes using pristine carboxylic acids was achieved by the photoexcitation of (diarylmethylene)amino benziodoxolones (DABXs), which serve as both an oxidant and an aminating reagent (an iminyl radical precursor). The developed method is a simple photochemical reaction without the need for external photosensitizers and shows a broad substrate scope for aliphatic carboxylic acids leading to the formation of primary, secondary, and tertiary alkyl radicals, thus enabling the facile synthesis of various structurally complex amines. Mechanistic investigations including transient absorption spectroscopy measurements using a laser flash photolysis (LFP) method disclosed the unique photochemical reactivity of DABXs, which undergoes homolysis of their I-N bonds to give an iminyl radical and ortho-iodobenzoyloxy radical, the latter of which participates in the single-electron oxidation of carboxylates.
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Affiliation(s)
- Daichi Okumatsu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Yamadaoka 2-1 Suita Osaka 565-0871 Japan
| | - Kensuke Kiyokawa
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Yamadaoka 2-1 Suita Osaka 565-0871 Japan
| | - Linh Tran Bao Nguyen
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University Kagamiyama 1-3-1 Higashi-hiroshima Hiroshima 739-8526 Japan
| | - Manabu Abe
- Department of Chemistry, Graduate School of Advanced Science and Engineering, Hiroshima University Kagamiyama 1-3-1 Higashi-hiroshima Hiroshima 739-8526 Japan
| | - Satoshi Minakata
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University Yamadaoka 2-1 Suita Osaka 565-0871 Japan
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4
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Thai P, Frey BL, Figgins MT, Thompson RR, Carmieli R, Powers DC. Selective multi-electron aggregation at a hypervalent iodine center by sequential disproportionation. Chem Commun (Camb) 2023; 59:4308-4311. [PMID: 36939182 PMCID: PMC10089653 DOI: 10.1039/d3cc00549f] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
We demonstrate that sequential disproportionation reactions can enable selective aggregation of two- or four electron-holes at a hypervalent iodine center. Disproportionation of an anodically generated iodanyl radical affords an iodosylbenzene derivative. Subsequent iodosylbenzene disproportionation can be triggered to provide access to an iodoxybenzene. These results demonstrate multielectron oxidation at the one-electron potential by selective and sequential disproportionation chemistry.
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Affiliation(s)
- Phong Thai
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
| | - Brandon L Frey
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
| | - Matthew T Figgins
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
| | - Richard R Thompson
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
| | | | - David C Powers
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, USA.
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5
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Sokolovs I, Suna E. Electrochemical Synthesis of Dimeric λ 3-Bromane: Platform for Hypervalent Bromine(III) Compounds. Org Lett 2023; 25:2047-2052. [PMID: 36944352 PMCID: PMC10071479 DOI: 10.1021/acs.orglett.3c00405] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/23/2023]
Abstract
A straightforward and scalable approach to a previously unreported class of cyclic hypervalent Br(III) species capitalizes on the anodic oxidation of aryl bromide to dimeric benzbromoxole that serves as a versatile platform to access a range of structurally diverse Br(III) congeners such as acetoxy-, alkoxy-, and ethynyl-λ3-bromanes as well as diaryl-λ3-bromanes. The synthetic utility of dimeric λ3-bromane is exemplified by photoinduced Minisci-type heteroarylation reactions and benzylic oxidation.
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Affiliation(s)
- Igors Sokolovs
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
| | - Edgars Suna
- Latvian Institute of Organic Synthesis, Aizkraukles 21, LV-1006 Riga, Latvia
- Department of Chemistry, University of Latvia, Jelgavas 1, LV-1004 Riga, Latvia
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6
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Nakada M. Research on the Efficient Enantioselective Total Synthesis of Useful Bioactive Polycyclic Compounds. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2022. [DOI: 10.1246/bcsj.20210329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Masahisa Nakada
- Department of Chemistry and Biochemistry, Graduate School of Advanced Science and Engineering, Waseda University, 3-4-1, Okubo, Shinjuku-ku, Tokyo 119-8555
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7
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Amos SGE, Nicolai S, Waser J. Photocatalytic Umpolung of N- and O-substituted alkenes for the synthesis of 1,2-amino alcohols and diols. Chem Sci 2020; 11:11274-11279. [PMID: 34094368 PMCID: PMC8162387 DOI: 10.1039/d0sc03655b] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
We report an organophotocatalytic 1,2-oxyalkynylation of ene-carbamates and enol ethers using Ethynyl BenziodoXolones (EBXs). 1-Alkynyl-1,2-amino alcohols and diols were obtained in up to 89% yield. Photocatalytic formation of radical cations led to Umpolung of the innate reactivity of the alkenes, enabling addition of a nucleophilic benzoate followed by radical alkynylation. Photocatalytic Umpolung with organic dyes overcoming the innate nucleophilicity of enecarbamates and enol ethers for oxyalkynylation with EBX reagents to access 1-alkynyl-1,2-amino alcohols and diols.![]()
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Affiliation(s)
- Stephanie G E Amos
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Stefano Nicolai
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
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8
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Kita Y, Dohi T, Komiyama K, Ueda S, Yamaoka N. Benzylic Oxidation and Functionalizations of Xanthenes by Ligand Trasfer Reactions of Hypervalent Iodine Reagents. HETEROCYCLES 2020. [DOI: 10.3987/com-19-14139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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9
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Maurya A, Kesharwani N, Kachhap P, Mishra VK, Chaudhary N, Haldar C. Polymer‐anchored mononuclear and binuclear Cu
II
Schiff‐base complexes: Impact of heterogenization on liquid phase catalytic oxidation of a series of alkenes. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5094] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Abhishek Maurya
- Department of ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India
| | - Neha Kesharwani
- Department of ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India
| | - Payal Kachhap
- Department of ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India
| | - Vivek Kumar Mishra
- Department of ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India
| | - Nikita Chaudhary
- Department of Chemistry and Polymer ScienceStellenbosch University Matieland 7602 Stellenbosch South Africa
| | - Chanchal Haldar
- Department of ChemistryIndian Institute of Technology (Indian School of Mines) Dhanbad 826004 Jharkhand India
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10
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Deng Y, Nguyen MD, Zou Y, Houk KN, Smith AB. Generation of Dithianyl and Dioxolanyl Radicals Using Photoredox Catalysis: Application in the Total Synthesis of the Danshenspiroketallactones via Radical Relay Chemistry. Org Lett 2019; 21:1708-1712. [PMID: 30807194 DOI: 10.1021/acs.orglett.9b00271] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Visible-light-induced generation of dithianyl and dioxolanyl radicals via selective hydrogen atom transfer (HAT) has been achieved. This radical relay tactic enables remote C(sp3)-H functionalization to permit rapid access to polyol and spiroketal segments, and in turn has been exploited as a key synthetic construct in the total synthesis of the danshenspiroketallactones. The conformational stability of the danshenspiroketallactones has also been defined via experiments and DFT calculations.
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Affiliation(s)
- Yifan Deng
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylavania 19104 , United States
| | - Minh D Nguyen
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylavania 19104 , United States
| | - Yike Zou
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095 , United States
| | - K N Houk
- Department of Chemistry and Biochemistry , University of California, Los Angeles , 607 Charles E. Young Drive East , Los Angeles , California 90095 , United States
| | - Amos B Smith
- Department of Chemistry , University of Pennsylvania , 231 South 34th Street , Philadelphia , Pennsylavania 19104 , United States
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11
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Wang Y, Hu X, Morales-Rivera CA, Li GX, Huang X, He G, Liu P, Chen G. Epimerization of Tertiary Carbon Centers via Reversible Radical Cleavage of Unactivated C(sp 3)-H Bonds. J Am Chem Soc 2018; 140:9678-9684. [PMID: 29983059 DOI: 10.1021/jacs.8b05753] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Reversible cleavage of C(sp3)-H bonds can enable racemization or epimerization, offering a valuable tool to edit the stereochemistry of organic compounds. While epimerization reactions operating via cleavage of acidic C(sp3)-H bonds, such as the Cα-H of carbonyl compounds, have been widely used in organic synthesis and enzyme-catalyzed biosynthesis, epimerization of tertiary carbons bearing a nonacidic C(sp3)-H bond is much more challenging with few practical methods available. Herein, we report the first synthetically useful protocol for the epimerization of tertiary carbons via reversible radical cleavage of unactivated C(sp3)-H bonds with hypervalent iodine reagent benziodoxole azide and H2O under mild conditions. These reactions exhibit excellent reactivity and selectivity for unactivated 3° C-H bonds of various cycloalkanes and offer a powerful strategy for editing the stereochemical configurations of carbon scaffolds intractable to conventional methods. Mechanistic study suggests that the unique ability of N3• to serve as a catalytic H atom shuttle is critical to reversibly break and reform 3° C-H bonds with high efficiency and selectivity.
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Affiliation(s)
- Yaxin Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xiafei Hu
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Cristian A Morales-Rivera
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Guo-Xing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Xin Huang
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071 , China
| | - Peng Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , Pennsylvania 15260 , United States
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry, College of Chemistry , Nankai University , Tianjin 300071 , China.,Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Tianjin 300071 , China.,Department of Chemistry , The Pennsylvania State University , University Park , Pennsylvania 16802 , United States
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12
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Dohi T, Ueda S, Iwasaki K, Tsunoda Y, Morimoto K, Kita Y. Selective carboxylation of reactive benzylic C-H bonds by a hypervalent iodine(III)/inorganic bromide oxidation system. Beilstein J Org Chem 2018; 14:1087-1094. [PMID: 29977380 PMCID: PMC6009330 DOI: 10.3762/bjoc.14.94] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 04/26/2018] [Indexed: 12/19/2022] Open
Abstract
An oxidation system comprising phenyliodine(III) diacetate (PIDA) and iodosobenzene with inorganic bromide, i.e., sodium bromide, in an organic solvent led to the direct introduction of carboxylic acids into benzylic C–H bonds under mild conditions. The unique radical species, generated by the homolytic cleavage of the labile I(III)–Br bond of the in situ-formed bromo-λ3-iodane, initiated benzylic carboxylation with a high degree of selectivity for the secondary benzylic position.
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Affiliation(s)
- Toshifumi Dohi
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel: +81-77-561-4908
| | - Shohei Ueda
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel: +81-77-561-4908
| | - Kosuke Iwasaki
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel: +81-77-561-4908
| | - Yusuke Tsunoda
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel: +81-77-561-4908
| | - Koji Morimoto
- College of Pharmaceutical Sciences, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel: +81-77-561-4908
| | - Yasuyuki Kita
- Research Organization of Science and Technology, Ritsumeikan University, 1-1-1 Nojihigashi, Kusatsu, Shiga 525-8577, Japan. Tel
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13
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Lam YP, Yeung YY. Metal-Free Allylic Oxidation of Steroids Using TBAI/TBHP Organocatalytic Protocol. Chem Asian J 2018; 13:2369-2372. [DOI: 10.1002/asia.201800256] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Revised: 03/12/2018] [Indexed: 02/03/2023]
Affiliation(s)
- Ying-Pong Lam
- Department of Chemistry; The Chinese University of Hong Kong; Shatin N.T. Hong Kong China
| | - Ying-Yeung Yeung
- Department of Chemistry; The Chinese University of Hong Kong; Shatin N.T. Hong Kong China
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14
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Kuga T, Sasano Y, Iwabuchi Y. IBX as a catalyst for dehydration of hydroperoxides: green entry to α,β-unsaturated ketones via oxygenative allylic transposition. Chem Commun (Camb) 2018; 54:798-801. [DOI: 10.1039/c7cc08957k] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A catalytic transformation of allylic hydroperoxides into α,β-unsaturated carbonyl compounds using IBX as a dehydration catalyst is described.
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Affiliation(s)
- Tetsuya Kuga
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Aoba-ku
- Japan
| | - Yusuke Sasano
- Graduate School of Pharmaceutical Sciences
- Tohoku University
- Aoba-ku
- Japan
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15
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Li GX, Morales-Rivera CA, Gao F, Wang Y, He G, Liu P, Chen G. A unified photoredox-catalysis strategy for C(sp 3)-H hydroxylation and amidation using hypervalent iodine. Chem Sci 2017; 8:7180-7185. [PMID: 29081950 PMCID: PMC5635418 DOI: 10.1039/c7sc02773g] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 09/02/2017] [Indexed: 12/22/2022] Open
Abstract
We report a unified photoredox-catalysis strategy for both hydroxylation and amidation of tertiary and benzylic C-H bonds. Use of hydroxyl perfluorobenziodoxole (PFBl-OH) oxidant is critical for efficient tertiary C-H functionalization, likely due to the enhanced electrophilicity of the benziodoxole radical. Benzylic methylene C-H bonds can be hydroxylated or amidated using unmodified hydroxyl benziodoxole oxidant Bl-OH under similar conditions. An ionic mechanism involving nucleophilic trapping of a carbocation intermediate by H2O or CH3CN cosolvent is presented.
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Affiliation(s)
- Guo-Xing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | | | - Fang Gao
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Yaxin Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Peng Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , PA 15260 , USA .
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry , College of Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
- Department of Chemistry , The Pennsylvania State University , 104 Chemistry Building , University Park , PA 16802 , USA .
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16
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Yu Y, Humeidi R, Alleyn JR, Doyle MP. Catalytic Allylic Oxidation of Cyclic Enamides and 3,4-Dihydro-2H-Pyrans by TBHP. J Org Chem 2017; 82:8506-8513. [PMID: 28723085 DOI: 10.1021/acs.joc.7b01163] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Allylic oxidation of heteroatom substituted cyclic alkenes by tert-butyl hydroperoxide (70% TBHP in water) using catalytic dirhodium caprolactamate [Rh2(cap)4] forms enone products with a variety of 2-substituted cyclic enamides and 3,4-dihyro-2H-pyrans. These reactions occur under mild reaction conditions, are operationally convenient to execute, and are effective for product formation with as low as 0.25 mol% catalyst loading. With heteroatom stabilization of the intermediate allylic free radical two sites for oxidative product formation are possible, and the selectivity of the oxidative process varies with the heteroatom when R = H. Cyclic enamides produce 4-piperidones in good yields when R = alkyl or aryl, but oxidation of 2H-pyrans also gives alkyl cleavage products. Alternative catalysts for TBHP oxidations show comparable selectivities but give lower product yields.
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Affiliation(s)
- Yang Yu
- Department of Chemistry, The University of Texas at San Antonio , San Antonio, Texas 78249, United States
| | - Ranad Humeidi
- Department of Chemistry, The University of Texas at San Antonio , San Antonio, Texas 78249, United States
| | - James R Alleyn
- Department of Chemistry, The University of Texas at San Antonio , San Antonio, Texas 78249, United States
| | - Michael P Doyle
- Department of Chemistry, The University of Texas at San Antonio , San Antonio, Texas 78249, United States
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17
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Abstract
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The chemistry of hypervalent iodine(III) compounds
has gained great interest over the past 30 years. Hypervalent iodine(III)
compounds show valuable ionic reactivity due to their high electrophilicity
but also express radical reactivity as single electron oxidants for
carbon and heteroatom radical generation. Looking at ionic chemistry,
these iodine(III) reagents can act as electrophiles to efficiently
construct C–CF3, X–CF3 (X = heteroatom),
C–Rf (Rf = perfluoroalkyl), X–Rf, C–N3, C–CN, S–CN, and C–X
bonds. In some cases, a Lewis or a Bronsted acid is necessary to increase
their electrophilicity. In these transformations, the iodine(III)
compounds react as formal “CF3+”,
“Rf+”, “N3+”, “Ar+”, “CN+”, and “X+” equivalents. On the other
hand, one electron reduction of the I(III) reagents opens the door
to the radical world, which is the topic of this Account that focuses
on radical reactivity of hypervalent iodine(III) compounds such as
the Togni reagent, Zhdankin reagent, diaryliodonium salts, aryliodonium
ylides, aryl(cyano)iodonium triflates, and aryl(perfluoroalkyl)iodonium
triflates. Radical generation starting with I(III) reagents can also
occur via thermal or light mediated homolysis of the weak hypervalent
bond in such reagents. This reactivity can be used for alkane C–H
functionalization. We will address important pioneering work in the
area but will mainly focus on studies that have been conducted by
our group over the last 5 years. We entered the field by investigating
transition metal free single electron reduction of Togni type reagents
using the readily available sodium 2,2,6,6-tetramethylpiperidine-1-oxyl
salt (TEMPONa) as an organic one electron reductant for clean generation
of the trifluoromethyl radical and perfluoroalkyl radicals. That valuable
approach was later successfully also applied to the generation of
azidyl and aryl radicals starting with the corresponding benziodoxole
(Zhdankin reagent) and iodonium salts. In the presence of alkenes
as radical acceptors, vicinal trifluoromethyl-, azido-, and arylaminoxylation
products result via a sequence comprising radical addition to the
alkene and subsequent TEMPO trapping. Electron-rich arenes also react
with I(III) reagents via single electron transfer (SET) to give arene
radical cations, which can then engage in arylation reactions. We
also recognized that the isonitrile functionality in aryl isonitriles
is a highly efficient perfluoroalkyl radical acceptor, and reaction
of Rf-benziodoxoles (Togni type reagents) in the presence
of a radical initiator provides various perfluoroalkylated N-heterocycles (indoles, phenanthridines, quinolines, etc.).
We further found that aryliodonium ylides, previously used as carbene
precursors in metal-mediated cyclopropanation reactions, react via
SET reduction with TEMPONa to the corresponding aryl radicals. As
a drawback of all these transformations, we realized that only one
ligand of the iodine(III) reagent gets transferred to the substrate.
To further increase atom-economy of such conversions, we identified
cyano or perfluoroalkyl iodonium triflate salts as valuable reagents
for stereoselective vicinal alkyne difunctionalization, where two
ligands from the I(III) reagent are sequentially transferred to an
alkyne acceptor. Finally, we will discuss alkynyl-benziodoxoles
as radical acceptors for alkynylation reactions. Similar reactivity
was found for the Zhdankin reagent that has been successfully applied
to azidation of C-radicals, and also cyanation is possible with a
cyano I(III) reagent. To summarize, this Account focuses on the design,
development, mechanistic understanding, and synthetic application
of hypervalent iodine(III) reagents in radical chemistry.
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Affiliation(s)
- Xi Wang
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
| | - Armido Studer
- Institute of Organic Chemistry, University of Münster, Corrensstrasse 40, 48149 Münster, Germany
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19
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Santschi N, Jelier BJ, Nauser T. Mechanistic insight into the thermal activation of Togni's trifluoromethylation reagents. Phys Chem Chem Phys 2017; 19:18172-18177. [DOI: 10.1039/c7cp01396e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The thermal activation of Togni's reagent was studied by GC-MS and shown to generate CF3 and, concomitantly, alkyl radicals.
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Affiliation(s)
- Nico Santschi
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH) – Zürich
- CH-8093 Zürich
- Switzerland
| | - Benson J. Jelier
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH) – Zürich
- CH-8093 Zürich
- Switzerland
| | - Thomas Nauser
- Department of Chemistry and Applied Biosciences
- Swiss Federal Institute of Technology (ETH) – Zürich
- CH-8093 Zürich
- Switzerland
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20
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Sakamoto R, Inada T, Selvakumar S, Moteki SA, Maruoka K. Efficient photolytic C-H bond functionalization of alkylbenzene with hypervalent iodine(iii) reagent. Chem Commun (Camb) 2016; 52:3758-61. [PMID: 26686276 DOI: 10.1039/c5cc07647a] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A practical approach to radical C-H bond functionalization by the photolysis of a hypervalent iodine(iii) reagent is presented. The photolysis of [bis(trifluoroacetoxy)iodo]benzene (PIFA) leads to the generation of trifluoroacetoxy radicals, which allows the smooth transformation of various alkylbenzenes to the corresponding benzyl ester compounds under mild reaction conditions.
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Affiliation(s)
- Ryu Sakamoto
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
| | - Tsubasa Inada
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
| | - Sermadurai Selvakumar
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
| | - Shin A Moteki
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
| | - Keiji Maruoka
- Department of Chemistry, Graduate School of Science, Kyoto University, Sakyo, Kyoto 606-8502, Japan.
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21
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Li GX, Morales-Rivera CA, Wang Y, Gao F, He G, Liu P, Chen G. Photoredox-mediated Minisci C-H alkylation of N-heteroarenes using boronic acids and hypervalent iodine. Chem Sci 2016; 7:6407-6412. [PMID: 28451096 PMCID: PMC5356021 DOI: 10.1039/c6sc02653b] [Citation(s) in RCA: 220] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Accepted: 07/08/2016] [Indexed: 01/03/2023] Open
Abstract
A photoredox-mediated Minisci C-H alkylation reaction of N-heteroarenes with alkyl boronic acids is reported. A broad range of primary and secondary alkyl groups can be efficiently incorporated into various N-heteroarenes using [Ru(bpy)3]Cl2 as photocatalyst and acetoxybenziodoxole as oxidant under mild conditions. The reaction exhibits excellent substrate scope and functional group tolerance, and offers a broadly applicable method for late-stage functionalization of complex substrates. Mechanistic experiments and computational studies suggest that an intramolecularly stabilized ortho-iodobenzoyloxy radical intermediate might play a key role in this reaction system.
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Affiliation(s)
- Guo-Xing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | | | - Yaxin Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Fang Gao
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Peng Liu
- Department of Chemistry , University of Pittsburgh , Pittsburgh , PA 15260 , USA .
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
- Department of Chemistry , The Pennsylvania State University , 104 Chemistry Building , University Park , PA 16802 , USA .
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22
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Liu D, Bielawski CW. Direct azidation of isotactic polypropylene and synthesis of ‘grafted to’ derivatives thereof using azide–alkyne cycloaddition chemistry. POLYM INT 2016. [DOI: 10.1002/pi.5180] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Di Liu
- Department of Chemistry University of Texas at Austin Austin TX 78712 USA
| | - Christopher W Bielawski
- Center for Multidimensional Carbon Materials (CMCM) Institute for Basic Science (IBS) Ulsan 44919 Republic of Korea
- Department of Chemistry and Department of Energy Engineering Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea
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23
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Ji W, Tan H, Wang M, Li P, Wang L. Photocatalyst-free hypervalent iodine reagent catalyzed decarboxylative acylarylation of acrylamides with α-oxocarboxylic acids driven by visible-light irradiation. Chem Commun (Camb) 2016; 52:1462-5. [PMID: 26649450 DOI: 10.1039/c5cc08253f] [Citation(s) in RCA: 108] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
A hypervalent iodine(iii) reagent catalyzed carbonylarylation of acrylamides with α-oxocarboxylic acids driven by visible-light without a photoredox catalyst has been developed. The reactions generate the corresponding products in good yields at room temperature. Experiments indicate that a blue LED (450-455 nm) is the most effective energy for the cleavage of the oxygen-iodine bond to initiate the reaction. Mechanistic studies further demonstrate that the reaction undergoes a cascade decarboxylative radical addition/cyclization process along with releasing CO2 and H2.
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Affiliation(s)
- Wangqin Ji
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Hui Tan
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Min Wang
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Pinhua Li
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China.
| | - Lei Wang
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000, P. R. China. and State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
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24
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Wang Y, Li GX, Yang G, He G, Chen G. A visible-light-promoted radical reaction system for azidation and halogenation of tertiary aliphatic C-H bonds. Chem Sci 2016; 7:2679-2683. [PMID: 28660040 PMCID: PMC5477033 DOI: 10.1039/c5sc04169d] [Citation(s) in RCA: 132] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 01/09/2016] [Indexed: 12/11/2022] Open
Abstract
A highly tunable radical-mediated reaction system for the functionalization of tertiary aliphatic C-H bonds was developed. Reactions of various substrates with the Zhdankin azidoiodane reagent 1, Ru(bpy)3Cl2, and visible light irradiation at room temperature gave C-H azidated or halogenated products in an easily controllable fashion. These reactions are efficient, selective, and compatible with complex substrates. They provide a potentially valuable tool for selectively labeling tertiary C-H bonds of organic and biomolecules with tags of varied chemical and biophysical properties for comparative functional studies.
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Affiliation(s)
- Yaxin Wang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Guo-Xing Li
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Guohui Yang
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Gang He
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
| | - Gong Chen
- State Key Laboratory and Institute of Elemento-Organic Chemistry , Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) , Nankai University , Tianjin 300071 , China .
- Department of Chemistry , The Pennsylvania State University , 104 Chemistry Building , University Park , PA 16802 , USA .
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25
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Rabet PTG, Fumagalli G, Boyd S, Greaney MF. Benzylic C–H Azidation Using the Zhdankin Reagent and a Copper Photoredox Catalyst. Org Lett 2016; 18:1646-9. [DOI: 10.1021/acs.orglett.6b00512] [Citation(s) in RCA: 110] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Pauline T. G. Rabet
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Gabriele Fumagalli
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
| | - Scott Boyd
- Department
of Oncology, AstraZeneca, Alderley Park, Macclesfield SK10 4TG, U.K
| | - Michael F. Greaney
- School
of Chemistry, University of Manchester, Oxford Road, Manchester M13 9PL, U.K
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26
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Li Y, Hari DP, Vita MV, Waser J. Cyclic Hypervalent Iodine Reagents for Atom-Transfer Reactions: Beyond Trifluoromethylation. Angew Chem Int Ed Engl 2016; 55:4436-54. [DOI: 10.1002/anie.201509073] [Citation(s) in RCA: 272] [Impact Index Per Article: 34.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Indexed: 12/18/2022]
Affiliation(s)
- Yifan Li
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Switzerland
| | - Durga Prasad Hari
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Switzerland
| | - Maria Victoria Vita
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Switzerland
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27
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Li Y, Hari DP, Vita MV, Waser J. Cyclische hypervalente Iodreagentien für Atomtransferreaktionen - jenseits der Trifluormethylierung. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201509073] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yifan Li
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Schweiz
| | - Durga Prasad Hari
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Schweiz
| | - Maria Victoria Vita
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Schweiz
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis; Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO; BCH 4306 1015 Lausanne CH Schweiz
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Abstract
The preparation, structure, and chemistry of hypervalent iodine compounds are reviewed with emphasis on their synthetic application. Compounds of iodine possess reactivity similar to that of transition metals, but have the advantage of environmental sustainability and efficient utilization of natural resources. These compounds are widely used in organic synthesis as selective oxidants and environmentally friendly reagents. Synthetic uses of hypervalent iodine reagents in halogenation reactions, various oxidations, rearrangements, aminations, C-C bond-forming reactions, and transition metal-catalyzed reactions are summarized and discussed. Recent discovery of hypervalent catalytic systems and recyclable reagents, and the development of new enantioselective reactions using chiral hypervalent iodine compounds represent a particularly important achievement in the field of hypervalent iodine chemistry. One of the goals of this Review is to attract the attention of the scientific community as to the benefits of using hypervalent iodine compounds as an environmentally sustainable alternative to heavy metals.
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Affiliation(s)
- Akira Yoshimura
- Department of Chemistry and Biochemistry, University of Minnesota Duluth , Duluth, Minnesota 55812, United States
| | - Viktor V Zhdankin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth , Duluth, Minnesota 55812, United States
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29
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Koshimizu M, Nagatomo M, Inoue M. Unified Total Synthesis of 3-epi
-Ryanodol, Cinnzeylanol, Cinncassiols A and B, and Structural Revision of Natural Ryanodol and Cinnacasol. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511116] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Masaki Koshimizu
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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30
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Koshimizu M, Nagatomo M, Inoue M. Unified Total Synthesis of 3-epi
-Ryanodol, Cinnzeylanol, Cinncassiols A and B, and Structural Revision of Natural Ryanodol and Cinnacasol. Angew Chem Int Ed Engl 2016; 55:2493-7. [DOI: 10.1002/anie.201511116] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Masaki Koshimizu
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masanori Nagatomo
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
| | - Masayuki Inoue
- Graduate School of Pharmaceutical Sciences; The University of Tokyo; Hongo, Bunkyo-ku Tokyo 113-0033 Japan
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31
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Chen Z, Hadjichristidis N, Feng X, Gnanou Y. Cs2CO3-promoted polycondensation of CO2 with diols and dihalides for the synthesis of miscellaneous polycarbonates. Polym Chem 2016. [DOI: 10.1039/c6py00783j] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A one-pot protocol for the direct synthesis of polycarbonates through polycondensation of diols, dihalides and CO2 in the presence of Cs2CO3 is described.
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Affiliation(s)
- Zuliang Chen
- Physical Sciences and Engineering Division
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955
- Kingdom of Saudi Arabia
| | - Nikos Hadjichristidis
- KAUST Catalysis Center
- Physical Sciences and Engineering Division
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955
- Kingdom of Saudi Arabia
| | - Xiaoshuang Feng
- Physical Sciences and Engineering Division
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955
- Kingdom of Saudi Arabia
| | - Yves Gnanou
- Physical Sciences and Engineering Division
- King Abdullah University of Science and Technology (KAUST)
- Thuwal 23955
- Kingdom of Saudi Arabia
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32
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Kennedy N, Cohen T. The Stereoselective Reductions of Ketones to the Most Thermodynamically Stable Alcohols Using Lithium and Hydrated Salts of Common Transition Metals. J Org Chem 2015. [DOI: 10.1021/acs.joc.5b01232] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nicole Kennedy
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
| | - Theodore Cohen
- Department of Chemistry, University of Pittsburgh, Pittsburgh, Pennsylvania 15260, United States
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33
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Jin L, Feng J, Lu G, Cai C. Di-tert-butyl Peroxide (DTBP)-Mediated Oxidative Cross- Coupling of Isochroman and Indole Derivatives. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500048] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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34
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Tan H, Li H, Ji W, Wang L. Sunlight-Driven Decarboxylative Alkynylation of α-Keto Acids with Bromoacetylenes by Hypervalent Iodine Reagent Catalysis: A Facile Approach to Ynones. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201503479] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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35
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Tan H, Li H, Ji W, Wang L. Sunlight-Driven Decarboxylative Alkynylation of α-Keto Acids with Bromoacetylenes by Hypervalent Iodine Reagent Catalysis: A Facile Approach to Ynones. Angew Chem Int Ed Engl 2015; 54:8374-7. [PMID: 26031476 DOI: 10.1002/anie.201503479] [Citation(s) in RCA: 208] [Impact Index Per Article: 23.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Indexed: 02/06/2023]
Abstract
A novel and practical decarboxylative alkynylation of α-keto acids with bromoacetylenes is catalyzed by hypervalent iodine(III) reagents when irradiation by sunlight at room temperature. The product ynones are generated in good yields. Experiments show that results obtained with blue light (λ=450-455 nm) are comparable to those obtained when using sunlight. Mechanistic studies demonstrate that the sunlight-driven decarboxylation undergoes a radical process.
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Affiliation(s)
- Hui Tan
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000 (PR China)
| | - Hongji Li
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000 (PR China)
| | - Wangqin Ji
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000 (PR China)
| | - Lei Wang
- Department of Chemistry, Huaibei Normal University, Huaibei, Anhui 235000 (PR China). .,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032 (PR China).
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36
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Moghadam BN, Akhlaghinia B, Rezazadeh S. Direct and efficient synthesis of unsymmetrical ethers from alcohols catalyzed by Fe(HSO4)3 under solvent‐free conditions. RESEARCH ON CHEMICAL INTERMEDIATES 2015. [DOI: 10.1007/s11164-015-2098-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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37
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Wang Y, Kuang Y, Wang Y. Rh2(esp)2-catalyzed allylic and benzylic oxidations. Chem Commun (Camb) 2015; 51:5852-5. [DOI: 10.1039/c4cc10336j] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The dirhodium(ii) catalyst Rh2(esp)2 allows direct solvent-free allylic and benzylic oxidation by T-HYDRO with a remarkably low catalyst loading.
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Affiliation(s)
- Yi Wang
- College of Chemistry
- Sichuan University
- Chengdu
- P. R. China
| | - Yi Kuang
- College of Chemistry
- Sichuan University
- Chengdu
- P. R. China
| | - Yuanhua Wang
- College of Chemistry
- Sichuan University
- Chengdu
- P. R. China
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38
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39
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Mandal M, Chakraborty D. Kinetic investigation on the highly efficient and selective oxidation of sulfides to sulfoxides and sulfones with t-BuOOH catalyzed by La2O3. RSC Adv 2015. [DOI: 10.1039/c4ra14391d] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
An efficient and highly selective methodology for the oxidation of various sulfides with 70% t-BuOOH as oxidant in the presence of catalytic amounts of La2O3 is described.
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Affiliation(s)
- Mrinmay Mandal
- Department of Chemistry
- Indian Institute of Technology Patna
- Patna-800 013
- India
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40
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Abstract
A copper-catalyzed method for the oxidation of allylic and benzylic sp3 C–H by aqueous tert-butyl hydroperoxide (T-Hydro) in water using a recyclable fluorous ligand has been developed.
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Affiliation(s)
- Wei Jie Ang
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
| | - Yulin Lam
- Department of Chemistry
- National University of Singapore
- Singapore 117543
- Singapore
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41
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Huang H, Jia K, Chen Y. Hypervalent iodine reagents enable chemoselective deboronative/decarboxylative alkenylation by photoredox catalysis. Angew Chem Int Ed Engl 2014; 54:1881-4. [PMID: 25504966 DOI: 10.1002/anie.201410176] [Citation(s) in RCA: 144] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Indexed: 12/21/2022]
Abstract
Chemoselective C(sp(3))-C(sp(2)) coupling reactions under mild reaction conditions are useful for synthesizing alkyl-substituted alkenes having sensitive functional groups. Reported here is a visible-light-induced chemoselective alkenylation through a deboronation/decarboxylation sequence under neutral aqueous reaction conditions at room temperature. This reaction represents the first hypervalent-iodine-enabled radical decarboxylative alkenylation reaction, and a novel benziodoxole-vinyl carboxylic acid reaction intermediate was isolated. This C(sp(3))-C(sp(2)) coupling reaction leads to aryl-and acyl-substituted alkenes containing various sensitive functional groups. The excellent chemoselectivity, stable reactants, and neutral aqueous reaction conditions of the reaction suggest future biomolecule applications.
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Affiliation(s)
- Hanchu Huang
- State Key Laboratory of Bioorganic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032 (China)
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42
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Huang H, Jia K, Chen Y. Hypervalent Iodine Reagents Enable Chemoselective Deboronative/Decarboxylative Alkenylation by Photoredox Catalysis. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410176] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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43
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Konnick MM, Hashiguchi BG, Devarajan D, Boaz NC, Gunnoe TB, Groves JT, Gunsalus N, Ess DH, Periana RA. Selective CH Functionalization of Methane, Ethane, and Propane by a Perfluoroarene Iodine(III) Complex. Angew Chem Int Ed Engl 2014; 53:10490-4. [DOI: 10.1002/anie.201406185] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Indexed: 11/10/2022]
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Konnick MM, Hashiguchi BG, Devarajan D, Boaz NC, Gunnoe TB, Groves JT, Gunsalus N, Ess DH, Periana RA. Selective CH Functionalization of Methane, Ethane, and Propane by a Perfluoroarene Iodine(III) Complex. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201406185] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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45
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Moteki SA, Selvakumar S, Zhang T, Usui A, Maruoka K. A Practical Approach for the Oxidation of Unactivated Csp3H Bonds witho-Nitro(diacetoxyiodo)benzene as an Efficient Hypervalent Iodine(III)-Based Oxidizing Agent. ASIAN J ORG CHEM 2014. [DOI: 10.1002/ajoc.201402087] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Gao WC, Zhang C. Synthesis, characterization, and initial reaction study of two new bicyclic hypervalent iodine(III) reagents. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.03.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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47
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Hata T. New Synthetic Methods Using Interaction between Functionalized C-C Multiple Bonds and Iron Reagent. J SYN ORG CHEM JPN 2014. [DOI: 10.5059/yukigoseikyokaishi.72.972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Dohi T, Kita Y. New Site-Selective Organoradical Based on Hypervalent Iodine Reagent for Controlled Alkane sp3CH Oxidations. ChemCatChem 2013. [DOI: 10.1002/cctc.201300666] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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49
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Moteki SA, Usui A, Zhang T, Solorio Alvarado CR, Maruoka K. Site-Selective Oxidation of Unactivated C sp 3H Bonds with Hypervalent Iodine(III) Reagents. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201304359] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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50
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Moteki SA, Usui A, Zhang T, Solorio Alvarado CR, Maruoka K. Site-Selective Oxidation of Unactivated C sp 3H Bonds with Hypervalent Iodine(III) Reagents. Angew Chem Int Ed Engl 2013; 52:8657-60. [DOI: 10.1002/anie.201304359] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Indexed: 11/08/2022]
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