1
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Zhang Z, Cao X, Song X, Wang G, Shi B, Li X, Ma N, Liu L, Zhang G. Metal-free nucleophilic 7,8-dearomatization of quinolines: Spiroannulation of aminoquinoline protected amino acids. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2022.107779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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2
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Pratley C, Fenner S, Murphy JA. Nitrogen-Centered Radicals in Functionalization of sp 2 Systems: Generation, Reactivity, and Applications in Synthesis. Chem Rev 2022; 122:8181-8260. [PMID: 35285636 DOI: 10.1021/acs.chemrev.1c00831] [Citation(s) in RCA: 87] [Impact Index Per Article: 43.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The chemistry of nitrogen-centered radicals (NCRs) has plentiful applications in organic synthesis, and they continue to expand as our understanding of these reactive species increases. The utility of these reactive intermediates is demonstrated in the recent advances in C-H amination and the (di)amination of alkenes. Synthesis of previously challenging structures can be achieved by efficient functionalization of sp2 moieties without prefunctionalization, allowing for faster and more streamlined synthesis. This Review addresses the generation, reactivity, and application of NCRs, including, but not limited to, iminyl, aminyl, amidyl, and aminium species. Contributions from early discovery up to the most recent examples have been highlighted, covering radical initiation, thermolysis, photolysis, and, more recently, photoredox catalysis. Radical-mediated intermolecular amination of (hetero)arenes can occur with a variety of complex amine precursors, generating aniline derivatives, an important class of structures for drug discovery and development. Functionalization of olefins is achievable in high anti-Markovnikov regioselectivity and allows access to difunctionalized structures when the intermediate carbon radicals are trapped. Additionally, the reactivity of NCRs can be harnessed for the rapid construction of N-heterocycles such as pyrrolidines, phenanthridines, quinoxalines, and quinazolinones.
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Affiliation(s)
- Cassie Pratley
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom.,GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, United Kingdom
| | - Sabine Fenner
- GSK Medicines Research Centre, Gunnels Wood Road, Stevenage, Herts SG1 2NY, United Kingdom
| | - John A Murphy
- Department of Pure and Applied Chemistry, University of Strathclyde, 295 Cathedral Street, Glasgow G1 1XL, United Kingdom
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3
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Kwon K, Simons RT, Nandakumar M, Roizen JL. Strategies to Generate Nitrogen-centered Radicals That May Rely on Photoredox Catalysis: Development in Reaction Methodology and Applications in Organic Synthesis. Chem Rev 2022; 122:2353-2428. [PMID: 34623809 PMCID: PMC8792374 DOI: 10.1021/acs.chemrev.1c00444] [Citation(s) in RCA: 116] [Impact Index Per Article: 58.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
For more than 70 years, nitrogen-centered radicals have been recognized as potent synthetic intermediates. This review is a survey designed for use by chemists engaged in target-oriented synthesis. This review summarizes the recent paradigm shift in access to and application of N-centered radicals enabled by visible-light photocatalysis. This shift broadens and streamlines approaches to many small molecules because visible-light photocatalysis conditions are mild. Explicit attention is paid to innovative advances in N-X bonds as radical precursors, where X = Cl, N, S, O, and H. For clarity, key mechanistic data is noted, where available. Synthetic applications and limitations are summarized to illuminate the tremendous utility of photocatalytically generated nitrogen-centered radicals.
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Affiliation(s)
- Kitae Kwon
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708-0354, United States
| | - R Thomas Simons
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708-0354, United States
| | - Meganathan Nandakumar
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708-0354, United States
| | - Jennifer L Roizen
- Duke University, Department of Chemistry, Box 90346, Durham, North Carolina 27708-0354, United States
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4
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Wang J, Fang WH, Qu LB, Shen L, Maseras F, Chen X. An Expanded SET Model Associated with the Functional Hindrance Dominates the Amide-Directed Distal sp 3 C-H Functionalization. J Am Chem Soc 2021; 143:19406-19416. [PMID: 34761900 DOI: 10.1021/jacs.1c07983] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mechanistic understanding of catalytic radical reactions currently lags behind the flourishing development of new types of catalytic activation. Herein, an innovative single electron transfer (SET) model has been expanded by using the nonadiabatic crossing integrated with the rate-determining step of 1,5-hydrogen atom transfer (HAT) reaction to provide the control mechanism of radical decay dynamics through calculating excited-state relaxation paths of a paradigm example of the amide-directed distal sp3 C-H bond alkylation mediated by Ir-complex-based photocatalysts. The stability of carbon radical intermediates, the functional hindrance associated with the back SET, and the energy inversion between the reactive triplet and closed-shell ground states were verified to be key factors in improving catalytic efficiency via blocking radical inhibition. The expanded SET model associated with the dynamic behaviors and kinetic data could guide the design and manipulation of visible-light-driven inert bond activation by the utilization of photocatalysts bearing more or less electron-withdrawing groups and the comprehensive considerations of kinetic solvent effects and electron-withdrawing effects of substrates.
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Affiliation(s)
- Juanjuan Wang
- Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, China
| | - Wei-Hai Fang
- Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, China
| | - Ling-Bo Qu
- College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Lin Shen
- College of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology, Avgda. Països Catalans, 16, 43007 Tarragona, Spain.,College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
| | - Xuebo Chen
- Department of Chemistry, Beijing Normal University, Xin-wai-da-jie No. 19, Beijing 100875, China.,College of Chemistry, Zhengzhou University, Zhengzhou, Henan 450001, China
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5
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Hussein AA, Ma Y, Al‐Yasari A. Hypervalent Iodine‐Mediated Styrene Hetero‐ and Homodimerization Initiation Proceeds with Two‐Electron Reductive Cleavage. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001295] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
| | - Yumiao Ma
- BSJ Institue, Haidian 100084 Beijing People's Republic of China
| | - Ahmed Al‐Yasari
- School of Chemistry University of East Anglia NR4 7TJ Norwich United Kingdom
- Department of Chemistry Faculty of Sciences University of Kerbala Kerbala Iraq
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6
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Zheng S, Gutiérrez-Bonet Á, Molander GA. Merging Photoredox PCET with Nickel-Catalyzed Cross-Coupling: Cascade Amidoarylation of Unactivated Olefins. Chem 2019; 5:339-352. [PMID: 31080910 DOI: 10.1016/j.chempr.2018.11.014] [Citation(s) in RCA: 82] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The integration of amidyl radicals with cross-coupling chemistry opens new venues for reaction design. However, the lack of efficient methods for the generation of such radical species has prevented many such transformations from being brought to fruition. Herein, the amidoarylation of unactivated olefins by a cascade process from non-functionalized amides is reported by merging, for the first time, photoredox proton-coupled electron transfer (PCET) with nickel catalysis. This new technology grants access to an array of complex molecules containing a privileged pyrrolidinone core from alkenyl amides and aryl- and heteroaryl bromides in the presence of a visible light photocatalyst and a nickel catalyst. Notably, the reaction is not restricted to amides - carbamates and ureas can also be used. Mechanistic studies, including hydrogen-bond affinity constants, cyclization rate measurements, quenching studies, and cyclic voltammetry were central to comprehend the subtleties contributing to the integration of the two catalytic cycles.
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Affiliation(s)
- Shuai Zheng
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,These authors contributed equally to this work
| | - Álvaro Gutiérrez-Bonet
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,These authors contributed equally to this work
| | - Gary A Molander
- Roy and Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, 231 South 34th Street, Philadelphia, Pennsylvania 19104-6323, United States.,Lead Contact
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7
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Bose A, Maiti S, Sau S, Mal P. An intramolecular C(sp3)–H imination using PhI–mCPBA. Chem Commun (Camb) 2019; 55:2066-2069. [DOI: 10.1039/c8cc09100e] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Development of sustainable methods for the activation of less reactive undirected C(sp3)–H bonds is challenging but desired in organic synthesis. The present manuscript demonstrates selective activation of acidic C(sp3)–H groups for a dehydrogenative C–H imination reaction by 4H elimination using PhI (10 mol%)–mCPBA as an organocatalyst.
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Affiliation(s)
- Anima Bose
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India
| | - Saikat Maiti
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India
| | - Sudip Sau
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India
| | - Prasenjit Mal
- School of Chemical Sciences
- National Institute of Science Education and Research (NISER)
- HBNI
- Bhubaneswar
- India
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8
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Ruccolo S, Qin Y, Schnedermann C, Nocera DG. General Strategy for Improving the Quantum Efficiency of Photoredox Hydroamidation Catalysis. J Am Chem Soc 2018; 140:14926-14937. [DOI: 10.1021/jacs.8b09109] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Serge Ruccolo
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138−2902, United States
| | - Yangzhong Qin
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138−2902, United States
| | - Christoph Schnedermann
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138−2902, United States
| | - Daniel G. Nocera
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138−2902, United States
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9
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Alam MT, Maiti S, Mal P. The mechanochemical synthesis of quinazolin-4(3 H)-ones by controlling the reactivity of IBX. Beilstein J Org Chem 2018; 14:2396-2403. [PMID: 30254705 PMCID: PMC6142747 DOI: 10.3762/bjoc.14.216] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Accepted: 08/24/2018] [Indexed: 01/31/2023] Open
Abstract
Performing any synthesis using several arylamines and hypervalent iodine(V) reagents by direct mixing is unrealistic because of the high exothermic reaction or explosion. Herein we demonstrate, when anilines were substituted with an amide group at the ortho-position, successful chemical reactions could be performed due to intramolecular control. At maximum contact of the reacting substances, i.e., under solvent-free mechanochemical conditions, 2-aminobenzamides, aryl-, alkylaldehydes and the iodine(V) reagent o-iodoxybenzoic acid (IBX) led to substituted quinazolin-4(3H)-one derivatives in fair yields.
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Affiliation(s)
- Md Toufique Alam
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India; Tel: +919439613856
| | - Saikat Maiti
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India; Tel: +919439613856
| | - Prasenjit Mal
- School of Chemical Sciences, National Institute of Science Education and Research (NISER), HBNI, Bhubaneswar, PO Bhimpur-Padanpur, Via Jatni, District Khurda, Odisha 752050, India; Tel: +919439613856
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10
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Heteroatom-Centred Radicals for the Synthesis of Heterocyclic Compounds. TOPICS IN HETEROCYCLIC CHEMISTRY 2018. [DOI: 10.1007/7081_2018_19] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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11
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Zhou Z, Li Y, Han B, Gong L, Meggers E. Enantioselective catalytic β-amination through proton-coupled electron transfer followed by stereocontrolled radical-radical coupling. Chem Sci 2017; 8:5757-5763. [PMID: 28989615 PMCID: PMC5621506 DOI: 10.1039/c7sc02031g] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2017] [Accepted: 06/15/2017] [Indexed: 12/14/2022] Open
Abstract
A new mechanistic approach for the catalytic, enantioselective conjugate addition of nitrogen-based nucleophiles to acceptor-substituted alkenes is reported, which is based on a visible light induced and phosphate base promoted transfer of a single electron from a nitrogen nucleophile to a catalyst-bound acceptor-substituted alkene, followed by a stereocontrolled C-N bond formation through stereocontrolled radical-radical coupling. Specifically, N-aryl carbamates are added to the β-position of α,β-unsaturated 2-acyl imidazoles using a visible light activated photoredox mediator in combination with a chiral-at-rhodium Lewis acid catalyst and a weak phosphate base, affording new C-N bonds in a highly enantioselective fashion with enantioselectivities reaching up to 99% ee and >99 : 1 dr for a menthol-derived carbamate. As an application, the straightforward synthesis of a chiral β-amino acid ester derivative is demonstrated.
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Affiliation(s)
- Zijun Zhou
- College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China .
| | - Yanjun Li
- College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China .
| | - Bowen Han
- College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China .
| | - Lei Gong
- College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China .
| | - Eric Meggers
- College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , P. R. China .
- Fachbereich Chemie , Philipps-Universität Marburg , Hans-Meerwein-Strasse 4 , 35043 Marburg , Germany .
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12
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Patil PC, Akamanchi KG. A new combination of cyclohexylhydrazine and IBX for oxidative generation of cyclohexyl free radical and related synthesis of parvaquone. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.04.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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Katz JD, Haidle A, Childers KK, Zabierek AA, Jewell JP, Hou Y, Altman MD, Szewczak A, Chen D, Harsch A, Hayashi M, Warren L, Hutton M, Nuthall H, Su HP, Munshi S, Stanton MG, Davies IW, Munoz B, Northrup A. Structure guided design of a series of selective pyrrolopyrimidinone MARK inhibitors. Bioorg Med Chem Lett 2016; 27:114-120. [PMID: 27816515 DOI: 10.1016/j.bmcl.2016.08.068] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2016] [Revised: 08/19/2016] [Accepted: 08/20/2016] [Indexed: 01/29/2023]
Abstract
The initial structure activity relationships around an isoindoline uHTS hit will be described. Information gleaned from ligand co-crystal structures allowed for rapid refinements in both MARK potency and kinase selectivity. These efforts allowed for the identification of a compound with properties suitable for use as an in vitro tool compound for validation studies on MARK as a viable target for Alzheimer's disease.
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Affiliation(s)
- Jason D Katz
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA.
| | - Andrew Haidle
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Kaleen K Childers
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Anna A Zabierek
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - James P Jewell
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Yongquan Hou
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Michael D Altman
- Department of Structural Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Alexander Szewczak
- Department of In Vitro Sciences, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Dapeng Chen
- Department of Drug Metabolism, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Andreas Harsch
- Department of Drug Metabolism, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Mansuo Hayashi
- Department of Neuroscience, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Lee Warren
- Department of Neuroscience, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Michael Hutton
- Department of Neuroscience, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Hugh Nuthall
- Department of Neuroscience, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Hua-Poo Su
- Department of Structural Chemistry, Merck & Co., Inc., 770 Sumneytown Pike, West Point, PA 19486, USA
| | - Sanjeev Munshi
- Department of Structural Chemistry, Merck & Co., Inc., 770 Sumneytown Pike, West Point, PA 19486, USA
| | - Matt G Stanton
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Ian W Davies
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Ben Munoz
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
| | - Alan Northrup
- Department of Chemistry, Merck & Co., Inc., 33 Avenue Louis Pasteur, Boston, MA 02115, USA
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14
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Colomer I, Batchelor-McAuley C, Odell B, Donohoe TJ, Compton RG. Hydrogen Bonding to Hexafluoroisopropanol Controls the Oxidative Strength of Hypervalent Iodine Reagents. J Am Chem Soc 2016; 138:8855-61. [DOI: 10.1021/jacs.6b04057] [Citation(s) in RCA: 136] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Ignacio Colomer
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Christopher Batchelor-McAuley
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
| | - Barbara Odell
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Timothy J. Donohoe
- Department
of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
| | - Richard G. Compton
- Department
of Chemistry, Physical and Theoretical Chemistry Laboratory, University of Oxford, South Parks Road, Oxford OX1 3QZ, United Kingdom
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15
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Funes‐Ardoiz I, Sameera WMC, Romero RM, Martínez C, Souto JA, Sampedro D, Muñiz K, Maseras F. DFT Rationalization of the Diverse Outcomes of the Iodine(III)‐Mediated Oxidative Amination of Alkenes. Chemistry 2016; 22:7545-53. [DOI: 10.1002/chem.201600415] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Indexed: 12/22/2022]
Affiliation(s)
- Ignacio Funes‐Ardoiz
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - W. M. C. Sameera
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Fukui Institute for Fundamental Chemistry Kyoto University 606-8103 Kyoto Japan
| | - R. Martín Romero
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Claudio Martínez
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - José A. Souto
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
| | - Diego Sampedro
- Departamento de Química Centro de Investigación en Síntesis Química (CISQ) Universidad de La Rioja C/Madre de Dios, 51 26006 Logroño Spain
| | - Kilian Muñiz
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Catalan Institution for Research and Advanced Studies (ICREA) Pg. Lluís Companys 23 08010 Barcelona Spain
| | - Feliu Maseras
- Institute of Chemical Research of Catalonia (ICIQ) The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007 Tarragona Spain
- Departament de Química Universitat Autònoma de Barcelona 08193 Bellaterra Spain
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16
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Colomer I, Coura Barcelos R, Donohoe TJ. Catalytic Hypervalent Iodine Promoters Lead to Styrene Dimerization and the Formation of Tri- and Tetrasubstituted Cyclobutanes. Angew Chem Int Ed Engl 2016; 55:4748-52. [DOI: 10.1002/anie.201511683] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2015] [Revised: 01/26/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Ignacio Colomer
- Department of Chemistry; University of Oxford; Chemistry Research Laboratory; Mansfield Road Oxford OX1 3TA UK
| | - Rosimeire Coura Barcelos
- Department of Chemistry; University of Oxford; Chemistry Research Laboratory; Mansfield Road Oxford OX1 3TA UK
| | - Timothy J. Donohoe
- Department of Chemistry; University of Oxford; Chemistry Research Laboratory; Mansfield Road Oxford OX1 3TA UK
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17
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Colomer I, Coura Barcelos R, Donohoe TJ. Catalytic Hypervalent Iodine Promoters Lead to Styrene Dimerization and the Formation of Tri‐ and Tetrasubstituted Cyclobutanes. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511683] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Ignacio Colomer
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Rosimeire Coura Barcelos
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
| | - Timothy J. Donohoe
- Department of Chemistry University of Oxford Chemistry Research Laboratory Mansfield Road Oxford OX1 3TA UK
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18
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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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19
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Wang Y, Cheng X, Zhan Z, Ma X, Nie R, Hai L, Wu Y. IBX-promoted domino reaction of α-hydroxy amides: a facile one-pot synthesis of isatins. RSC Adv 2016. [DOI: 10.1039/c5ra25036f] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
A novel and temperature-controlled oxidation of α-hydroxy amides in the presence of IBX is described.
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Affiliation(s)
- Yaoling Wang
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Xu Cheng
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Zhen Zhan
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Xiaojun Ma
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Ruifang Nie
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Li Hai
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
| | - Yong Wu
- Key Laboratory of Drug Targeting and Drug Delivery System of Education Ministry
- Department of Medicinal Chemistry
- West China School of Pharmacy
- Sichuan University
- Chengdu 610041
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20
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Kumar Achar T, Mal P. Transformation of Contact-Explosives Primary Amines and Iodine(III) into a Successful Chemical Reaction under Solvent-Free Ball Milling Conditions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500914] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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21
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Armaly AM, DePorre YC, Groso EJ, Riehl PS, Schindler CS. Discovery of Novel Synthetic Methodologies and Reagents during Natural Product Synthesis in the Post-Palytoxin Era. Chem Rev 2015; 115:9232-76. [DOI: 10.1021/acs.chemrev.5b00034] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Ahlam M. Armaly
- Department of Chemistry, University of Michigan, 930 North
University Avenue, Ann Arbor, Michigan 48109, United States
| | - Yvonne C. DePorre
- Department of Chemistry, University of Michigan, 930 North
University Avenue, Ann Arbor, Michigan 48109, United States
| | - Emilia J. Groso
- Department of Chemistry, University of Michigan, 930 North
University Avenue, Ann Arbor, Michigan 48109, United States
| | - Paul S. Riehl
- Department of Chemistry, University of Michigan, 930 North
University Avenue, Ann Arbor, Michigan 48109, United States
| | - Corinna S. Schindler
- Department of Chemistry, University of Michigan, 930 North
University Avenue, Ann Arbor, Michigan 48109, United States
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22
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23
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Xie A, Zhou X, Feng L, Hu X, Dong W. The oxidation of alcohols with O-iodoxybenzoic acid (IBX) in aqueous nanomicelles at room temperature. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.03.047] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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24
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Zhang N, Samanta SR, Rosen BM, Percec V. Single Electron Transfer in Radical Ion and Radical-Mediated Organic, Materials and Polymer Synthesis. Chem Rev 2014; 114:5848-958. [DOI: 10.1021/cr400689s] [Citation(s) in RCA: 320] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Na Zhang
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Shampa R. Samanta
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Brad M. Rosen
- DuPont Titanium Technologies, Chestnut Run Plaza, Wilmington, Delaware 19805, United States
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
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25
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Patil P, Nimonkar A, Akamanchi KG. Aryl-Free Radical-Mediated Oxidative Arylation of Naphthoquinones Using o-Iodoxybenzoic Acid and Phenylhydrazines and Its Application toward the Synthesis of Benzocarbazoledione. J Org Chem 2014; 79:2331-6. [DOI: 10.1021/jo500131h] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pravin Patil
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Abhay Nimonkar
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Krishnacharya G. Akamanchi
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
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26
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Xu HC, Campbell JM, Moeller KD. Cyclization Reactions of Anode-Generated Amidyl Radicals. J Org Chem 2013; 79:379-91. [DOI: 10.1021/jo402623r] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Hai-Chao Xu
- Department
of Chemistry and Fujian Provincial Key Laboratory of Chemical Biology,
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - John M. Campbell
- Department
of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, United States
| | - Kevin D. Moeller
- Department
of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, United States
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27
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One-pot synthesis of N-heterocycles by tandem carbamoylation–oxidative bromolactamization of ω-alkenylmagnesium bromide. Tetrahedron Lett 2013. [DOI: 10.1016/j.tetlet.2013.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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28
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Chen F, Huang X, Cui Y, Jiao N. Direct transformation of methyl imines to α-iminonitriles under mild and transition-metal-free conditions. Chemistry 2013; 19:11199-202. [PMID: 23853059 DOI: 10.1002/chem.201301933] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Indexed: 11/09/2022]
Abstract
A novel transformation of methyl imines into α-iminonitriles under mild and transition-metal-free conditions is described. Three C sp 3-H bonds are cleaved in a radical pathway at room temperature under air. Simple bromide salts are employed to assist this radical process (see scheme; FG=functional group, PIDA = iodobenzene diacetate, TMS = trimethylsilyl).
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Affiliation(s)
- Feng Chen
- State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, Xue Yuan Road 38, Beijing 100191, PR China
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29
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Li Z, Song L, Li C. Silver-catalyzed radical aminofluorination of unactivated alkenes in aqueous media. J Am Chem Soc 2013; 135:4640-3. [PMID: 23506151 DOI: 10.1021/ja400124t] [Citation(s) in RCA: 269] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
We report herein a mild and catalytic intramolecular aminofluorination of unactivated alkenes. Thus, with the catalysis of AgNO3, the reactions of various N-arylpent-4-enamides with Selectfluor reagent in CH2Cl2/H2O led to the efficient synthesis of 5-fluoromethyl-substituted γ-lactams. A mechanism involving silver-catalyzed oxidative generation of amidyl radicals and silver-assisted fluorine atom transfer was proposed.
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Affiliation(s)
- Zhaodong Li
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, PR China
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30
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Gupta MK, Li Z, Snowden TS. One-Pot Synthesis of Trichloromethyl Carbinols from Primary Alcohols. J Org Chem 2012; 77:4854-60. [DOI: 10.1021/jo300725v] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Manoj K. Gupta
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
| | - Zhexi Li
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
| | - Timothy S. Snowden
- Department of Chemistry, The University of Alabama, P.O. Box 870336, Tuscaloosa, Alabama 35487-0336,
United States
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31
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Xiao J. Oxidative Enamine Catalysis: Direct Catalytic Enantioselective β-Functionalization of Aldehydes. ChemCatChem 2012. [DOI: 10.1002/cctc.201100488] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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32
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Bodipati N, Peddinti RK. Chemical generation of o-quinone monoimines for the rapid construction of 1,4-benzoxazine derivatives. Org Biomol Chem 2012; 10:1958-61. [DOI: 10.1039/c2ob06681e] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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33
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Zhuang S, Liu K, Li C. Stereoselective 6-Exo Cyclization of Amidyl Radicals. An Experimental and Theoretical Study. J Org Chem 2011; 76:8100-6. [DOI: 10.1021/jo2014406] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shunjun Zhuang
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| | - Kun Liu
- College of Chemistry, Tianjin Key Laboratory of Structure and Performance for Functional Molecule, Tianjin Normal University, Tianjin 300387, P. R. China
| | - Chaozhong Li
- Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
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34
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Nawrat CC, Lewis W, Moody CJ. Synthesis of Amino-1,4-benzoquinones and Their Use in Diels–Alder Approaches to the Aminonaphthoquinone Antibiotics. J Org Chem 2011; 76:7872-81. [PMID: 21866924 DOI: 10.1021/jo201320g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Christopher C. Nawrat
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - William Lewis
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
| | - Christopher J. Moody
- School of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K
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35
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Duschek A, Kirsch SF. 2-Iodoxybenzoic Acid-A Simple Oxidant with a Dazzling Array of Potential Applications. Angew Chem Int Ed Engl 2011; 50:1524-52. [DOI: 10.1002/anie.201000873] [Citation(s) in RCA: 205] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Indexed: 12/26/2022]
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36
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Duschek A, Kirsch SF. 2-Iodoxybenzoesäure - ein einfaches Oxidationsmittel mit einer Vielfalt an Anwendungsmöglichkeiten. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201000873] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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37
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Abstract
Organohypervalent iodine reagents have attracted significant recent interest as versatile and environmentally benign oxidants with numerous applications in organic synthesis. This Perspective summarizes synthetic applications of hypervalent iodine(V) reagents: 2-iodoxybenzoic acid (IBX), Dess-Martin periodinane (DMP), pseudocyclic iodylarenes, and their recyclable polymer-supported analogues. Recent advances in the development of new catalytic systems based on the generation of hypervalent iodine species in situ are also overviewed.
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Affiliation(s)
- Viktor V Zhdankin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, USA.
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38
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39
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Li Z, Wang Y, Tang C, Xu J, Wu X, Yao H. Synthesis of 3-Benzoyl Acrylates/Acrylamides via Dehydrogenation of 3-Benzoyl Propionates/Propionamides Using IBX/p-TsOH. CHINESE J CHEM 2010. [DOI: 10.1002/cjoc.201090225] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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40
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Fernandes RA, Chowdhury AK. Total Syntheses of All Stereoisomers of Phenatic Acid B. J Org Chem 2009; 74:8826-9. [DOI: 10.1021/jo901927w] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rodney A. Fernandes
- Department of Chemistry, Indian Institute of Technology Bombay, Powai 400076 Mumbai, Maharashtra India
| | - Asim K. Chowdhury
- Department of Chemistry, Indian Institute of Technology Bombay, Powai 400076 Mumbai, Maharashtra India
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41
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Hosokawa S. Development of Enolate Chemistry and Total Syntheses of Bioact ive Natural Products. J SYN ORG CHEM JPN 2009. [DOI: 10.5059/yukigoseikyokaishi.67.24] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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42
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Affiliation(s)
- Viktor V Zhdankin
- Department of Chemistry and Biochemistry, University of Minnesota Duluth, Duluth, Minnesota 55812, USA.
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43
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Lapitskaya MA, Vasiljeva LL, Pivnitsky KK. o-Iodoxybenzoic acid in dimethylformamide as a convenient reagent for the oxidation of alcohols to aldehydes and ketones. MENDELEEV COMMUNICATIONS 2008. [DOI: 10.1016/j.mencom.2008.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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44
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Fontaine P, Chiaroni A, Masson G, Zhu J. One-Pot Three-Component Synthesis of α-Iminonitriles by IBX/TBAB-Mediated Oxidative Strecker Reaction. Org Lett 2008; 10:1509-12. [DOI: 10.1021/ol800199b] [Citation(s) in RCA: 93] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Patrice Fontaine
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Angèle Chiaroni
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Géraldine Masson
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
| | - Jieping Zhu
- Institut de Chimie des Substances Naturelles, CNRS, 91198 Gif-sur-Yvette Cedex, France
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45
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Modified o-methyl-substituted IBX: room temperature oxidation of alcohols and sulfides in common organic solvents. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.11.013] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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46
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Ngouansavanh T, Zhu J. IBX-Mediated Oxidative Ugi-Type Multicomponent Reactions: Application to the N and C1 Functionalization of Tetrahydroisoquinoline. Angew Chem Int Ed Engl 2007; 46:5775-8. [PMID: 17591732 DOI: 10.1002/anie.200701603] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Tifelle Ngouansavanh
- Institut de Chimie des Substances Naturelles (ICSN), CNRS, 91198 Gif-sur-Yvette Cedex, France
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47
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Ngouansavanh T, Zhu J. IBX-Mediated Oxidative Ugi-Type Multicomponent Reactions: Application to the N and C1 Functionalization of Tetrahydroisoquinoline. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200701603] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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48
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Gallen MJ, Goumont R, Clark T, Terrier F, Williams CM. o-Iodoxybenzoic acid (IBX): pKa and proton-affinity analysis. Angew Chem Int Ed Engl 2007; 45:2929-34. [PMID: 16566050 DOI: 10.1002/anie.200504156] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Michael J Gallen
- School of Molecular and Microbial Sciences, University of Queensland, Brisbane, 4072, Queensland, Australia
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49
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Guin J, Mück-Lichtenfeld C, Grimme S, Studer A. Radical Transfer Hydroamination with Aminated Cyclohexadienes Using Polarity Reversal Catalysis: Scope and Limitations. J Am Chem Soc 2007; 129:4498-503. [PMID: 17371026 DOI: 10.1021/ja0692581] [Citation(s) in RCA: 140] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of various new 1-aminated-2,5-cyclohexadienes is described. These reagents can be used in radical transfer hydroaminations of unactivated and electron-rich double bonds. With thiols as polarity reversal catalysts good yields are obtained. The radical hydroamination occurs with good to excellent anti-Markovnikov selectivity. Many functional groups such as alcohols, silyl ethers, phosphonates, arylbromides, imides, amides, and also acidic protons are tolerated under the reaction conditions. DFT calculations provide insights into the aromatization of silyl, alkyl, and aminyl substituted cyclohexadienyl radicals to generate the corresponding C-, Si-, and N-centered radicals.
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Affiliation(s)
- Joyram Guin
- Fachbereich Chemie, Organisch-Chemisches Institut, Westfälische Wilhelms-Universität, Corrensstrasse 40, 48149 Münster
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50
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Nicolaou KC, Mathison CJN. Synthesis of imides, N-acyl vinylogous carbamates and ureas, and nitriles by oxidation of amides and amines with Dess-Martin periodinane. Angew Chem Int Ed Engl 2006; 44:5992-7. [PMID: 16124020 DOI: 10.1002/anie.200501853] [Citation(s) in RCA: 110] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- K C Nicolaou
- Department of Chemistry, Skaggs Institute for Chemical Biology, Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
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