1
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Höthker S, Gansäuer A. Formal Anti-Markovnikov Addition of Water to Olefins by Titanocene-Catalyzed Epoxide Hydrosilylation: From Stoichiometric to Sustainable Catalytic Reactions. GLOBAL CHALLENGES (HOBOKEN, NJ) 2023; 7:2200240. [PMID: 37483422 PMCID: PMC10362118 DOI: 10.1002/gch2.202200240] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 03/21/2023] [Indexed: 07/25/2023]
Abstract
Here, the evolution of the titanocene-catalyzed hydrosilylation of epoxides that yields the corresponding anti-Markovnikov alcohols is summarized. The study focuses on aspects of sustainability, efficient catalyst activation, and stereoselectivity. The latest variant of the reaction employs polymethylhydrosiloxane (PMHS), a waste product of the Müller-Rochow process as terminal reductant, features an efficient catalyst activation with benzylMgBr and the use of the bench stable Cp2TiCl2 as precatalyst. The combination of olefin epoxidation and epoxide hydrosilylation provides a uniquely efficient approach to the formal anti-Markovnikov addition of H2O to olefins.
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Affiliation(s)
- Sebastian Höthker
- Kekulé‐Institut für Organische Chemie und BiochemieRheinische Friedrich‐Wilhelms‐Universität BonnGerhard‐Domagk‐Straße 153121BonnGermany
| | - Andreas Gansäuer
- Kekulé‐Institut für Organische Chemie und BiochemieRheinische Friedrich‐Wilhelms‐Universität BonnGerhard‐Domagk‐Straße 153121BonnGermany
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2
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Jia H, Ritter T. α-Thianthrenium Carbonyl Species: The Equivalent of an α-Carbonyl Carbocation. Angew Chem Int Ed Engl 2022; 61:e202208978. [PMID: 35895980 PMCID: PMC9804271 DOI: 10.1002/anie.202208978] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Indexed: 01/05/2023]
Abstract
Here we report an α-thianthrenium carbonyl species, as the equivalent of an α-carbonyl carbocation, which is generated by the radical conjugate addition of a trifluoromethyl thianthrenium salt to Michael acceptors. The reactivity allows for the synthesis of Cα -tetrasubstituted α- and β-amino acid analogues via a Ritter reaction by addition of acetonitrile. Addition of hydroxide, methoxide, and even fluoride can afford α-heteroatom substituted α-phenylpropanoates.
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Affiliation(s)
- Hao Jia
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany,Institute of Organic ChemistryRWTH Aachen UniversityLandoltweg 152074AachenGermany
| | - Tobias Ritter
- Max-Planck-Institut für KohlenforschungKaiser-Wilhelm-Platz 145470Mülheim an der RuhrGermany
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3
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Schacht JH, Wu S, Klare S, Höthker S, Schmickler N, Gansäuer A. Polymethylhydrosiloxane (PMHS) as sustainable reductant in the titanocene catalyzed epoxide hydrosilylation. ChemCatChem 2022. [DOI: 10.1002/cctc.202200852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
| | - Shangze Wu
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé Instutu für Organische Chemie GERMANY
| | - Sven Klare
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé Institut für Organische Chemie GERMANY
| | - Sebastian Höthker
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé Institut für Organische Chemie GERMANY
| | - Niklas Schmickler
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé Institut für Organische Chemie GERMANY
| | - Andreas Gansäuer
- Universität Bonn Kekulé-Institut für Organische Chemie Gerhard Domagk Str. 1 53121 Bonn GERMANY
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4
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Jia H, Ritter T. α‐Thianthrenium Carbonyl Species: The Equivalent of an α‐Carbonyl Carbocation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202208978] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Hao Jia
- Max-Planck-Institute für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Chemistry Kaiser-Wilhelm-Platz 1 45470 Muelheim an der Ruhr GERMANY
| | - Tobias Ritter
- Max-Planck-Institut für Kohlenforschung: Max-Planck-Institut fur Kohlenforschung Department of Organic Chemistry Kaiser-Wilhelm-Platz 1 45470 Muelheim an der Ruhr GERMANY
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5
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Hilche T, Younas SL, Gansäuer A, Streuff J. A Guide to Low‐Valent Titanocene Complexes as Tunable Single‐Electron Transfer Catalysts for Applications in Organic Chemistry. ChemCatChem 2022. [DOI: 10.1002/cctc.202200530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Tobias Hilche
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé-Institut für Organische Chemie und Biochemie Gerhard-Domagk-Str. 1 53121 Bonn GERMANY
| | - Sara L. Younas
- Albert-Ludwigs-Universitat Freiburg Institut für Organische Chemie Albertstr. 21 79104 Freiburg im Breisgau GERMANY
| | - Andreas Gansäuer
- Rheinische Friedrich-Wilhelms-Universitat Bonn Kekulé-Institut für Organische Chemie und Biochemie Gerhard-Domagk-Str. 1 53121 Bonn GERMANY
| | - Jan Streuff
- Uppsala Universitet Department of Chemistry - BMC Husargatan 3 752 37 Uppsala SWEDEN
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6
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Guo F, Wang H, Ye X, Tan CH. Advanced Synthesis Using Photocatalysis Involved Dual Catalytic System. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Fenfen Guo
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Hong Wang
- Zhejiang University of Technology College of Pharmaceutical Science CHINA
| | - Xinyi Ye
- Zhejiang University of Technology College of Pharmaceutical Science 18 Chaowang Road 310014 Hangzhou CHINA
| | - Choon-Hong Tan
- Nanyang Technological University School of Physical and Mathematical Sciences SINGAPORE
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7
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Suga T, Takahashi Y, Miki C, Ukaji Y. Direct and Unified Access to Carbon Radicals from Aliphatic Alcohols by Cost-Efficient Titanium-Mediated Homolytic C-OH Bond Cleavage. Angew Chem Int Ed Engl 2022; 61:e202112533. [PMID: 35014149 DOI: 10.1002/anie.202112533] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Indexed: 12/28/2022]
Abstract
Low-valent Ti-mediated homolytic C-O bond cleavage offers unified access to carbon radicals from ubiquitous non-activated tertiary, secondary, and even primary alcohols. In contrast to the representative Ti reagents, which were ineffective for this purpose, "TiCl2 (cat)"/Zn (cat=catecholate) was found to be specifically active. This method was applied to the addition reactions of radicals to alkenes and exhibited high generality and yields. More than 50 combinations were examined. The excellent cost-efficiency and accessibility of "TiCl2 (cat)"/Zn further enhance its applicability. Control experiments proved the presence of a carbon radical intermediate and excluded the pathway via alkyl chlorides. Further mechanistic study indicated that the 1 : 2 complex of alkoxide (R-O- ) and TiIII is an active species in the C-O cleavage.
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Affiliation(s)
- Takuya Suga
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan
| | - Yuuki Takahashi
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan
| | - Chinatsu Miki
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan
| | - Yutaka Ukaji
- Division of Material Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa, Ishikawa, 920-1192, Japan
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8
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Suga T, Takahashi Y, Miki C, Ukaji Y. Direct and Unified Access to Carbon Radicals from Aliphatic Alcohols by Cost‐Efficient Titanium‐Mediated Homolytic C–OH Bond Cleavage. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202112533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Takuya Suga
- Kanazawa University Graduate School of Natural Science Kakuma 920-1192 Kanazawa JAPAN
| | - Yuuki Takahashi
- Kanazawa University: Kanazawa Daigaku Division of Material Chemistry, Graduate School of Natural Science and Technology JAPAN
| | - Chinatsu Miki
- Kanazawa University: Kanazawa Daigaku Division of Material Chemistry, School of Natural Science and Technology JAPAN
| | - Yutaka Ukaji
- Kanazawa University: Kanazawa Daigaku Division of Material Chemistry, School of Natural Science and Technology JAPAN
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9
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Sun Z, Huang H, Wang Q, Deng G. Bromo Radical‐Mediated Photoredox Aldehyde Decarbonylation towards Transition‐Metal‐Free Hydroalkylation of Acrylamides at Room Temperature. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202101188] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Zhaozhao Sun
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Huawen Huang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Qiaolin Wang
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
| | - Guo‐Jun Deng
- Key Laboratory for Green Organic Synthesis and Application of Hunan Province, Key Laboratory of Environmentally Friendly Chemistry and Application of Ministry of Education, College of Chemistry Xiangtan University Xiangtan 411105 People's Republic of China
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10
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Kern C, Selau J, Streuff J. A Titanium-Catalyzed Reductive α-Desulfonylation. Chemistry 2021; 27:6178-6182. [PMID: 33539578 PMCID: PMC8048938 DOI: 10.1002/chem.202005400] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 01/09/2021] [Indexed: 12/14/2022]
Abstract
A titanium(III)-catalyzed desulfonylation gives access to functionalized alkyl nitrile building blocks from α-sulfonyl nitriles, circumventing traditional base-mediated α-alkylation conditions and strong single electron donors. The reaction tolerates numerous functional groups including free alcohols, esters, amides, and it can be applied also to the α-desulfonylation of ketones. In addition, a one-pot desulfonylative alkylation is demonstrated. Preliminary mechanistic studies indicate a catalyst-dependent mechanism involving a homolytic C-S cleavage.
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Affiliation(s)
- Christoph Kern
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
| | - Jan Selau
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
| | - Jan Streuff
- Institut für Organische ChemieAlbert-Ludwigs-Universität FreiburgAlbertstr. 2179104Freiburg im BreisgauGermany
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11
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Fermi A, Gualandi A, Bergamini G, Cozzi PG. Shining Light on Ti
IV
Complexes: Exceptional Tools for Metallaphotoredox Catalysis. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000966] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Andrea Fermi
- Dipartimento di Chimica "G. Ciamician" Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Andrea Gualandi
- Dipartimento di Chimica "G. Ciamician" Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Giacomo Bergamini
- Dipartimento di Chimica "G. Ciamician" Università di Bologna via Selmi 2 40126 Bologna Italy
| | - Pier Giorgio Cozzi
- Dipartimento di Chimica "G. Ciamician" Università di Bologna via Selmi 2 40126 Bologna Italy
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12
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Moreira NM, Martelli LSR, de Julio KIR, Zukerman-Schpector J, Opatz T, Corrêa AG. Copper-Catalyzed One-Pot Synthesis of 3-( N
-Heteroarenyl)acrylonitriles through Radical Conjugated Addition of β-Nitrostyrene to Methylazaarenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Natália M. Moreira
- Centre of Excellence for Research in Sustainable Chemistry; Federal University of São Carlos; 13565-905 São Carlos SP Brazil
| | - Lorena S. R. Martelli
- Centre of Excellence for Research in Sustainable Chemistry; Federal University of São Carlos; 13565-905 São Carlos SP Brazil
| | - Kiyara I. R. de Julio
- Centre of Excellence for Research in Sustainable Chemistry; Federal University of São Carlos; 13565-905 São Carlos SP Brazil
| | | | - Till Opatz
- Department of Chemistry; Johannes Gutenberg-University; 55128 Mainz Germany
| | - Arlene G. Corrêa
- Centre of Excellence for Research in Sustainable Chemistry; Federal University of São Carlos; 13565-905 São Carlos SP Brazil
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13
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Zhang Z, Hilche T, Slak D, Rietdijk NR, Oloyede UN, Flowers RA, Gansäuer A. Titanocenes as Photoredox Catalysts Using Green-Light Irradiation. Angew Chem Int Ed Engl 2020; 59:9355-9359. [PMID: 32216162 PMCID: PMC7317808 DOI: 10.1002/anie.202001508] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 03/08/2020] [Indexed: 11/16/2022]
Abstract
Irradiation of Cp2 TiCl2 with green light leads to electronically excited [Cp2 TiCl2 ]*. This complex constitutes an efficient photoredox catalyst for the reduction of epoxides and for 5-exo cyclizations of suitably unsaturated epoxides. To the best of our knowledge, our system is the first example of a molecular titanium photoredox catalyst.
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Affiliation(s)
- Zhenhua Zhang
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Tobias Hilche
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Daniel Slak
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Niels R. Rietdijk
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | | | | | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
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14
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Zhang Z, Hilche T, Slak D, Rietdijk NR, Oloyede UN, Flowers RA, Gansäuer A. Titanocenes as Photoredox Catalysts Using Green‐Light Irradiation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001508] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Zhenhua Zhang
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Tobias Hilche
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Daniel Slak
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Niels R. Rietdijk
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | | | | | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
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15
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Jiang H, Seidler G, Studer A. Carboamination of Unactivated Alkenes through Three-Component Radical Conjugate Addition. Angew Chem Int Ed Engl 2019; 58:16528-16532. [PMID: 31529676 PMCID: PMC6900080 DOI: 10.1002/anie.201910926] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2019] [Indexed: 01/24/2023]
Abstract
Two-component Giese type radical additions are highly practical and established reactions. Herein, three-component radical conjugate additions of unactivated alkenes to Michael acceptors are reported. Amidyl radicals, oxidatively generated from α-amido oxy acids using redox catalysis, act as the third reaction component which add to the unactivated alkenes. The adduct radicals engage in Giese type additions to Michael acceptors to provide, after reduction, the three-component products in an overall alkene carboamination reaction. Transformations which can be conducted under practical mild conditions feature high functional group tolerance and broad substrate scope.
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Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
| | - Gesa Seidler
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-UniversitätCorrensstraß 4048149MünsterGermany
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16
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Jiang H, Seidler G, Studer A. Carboamination of Unactivated Alkenes through Three‐Component Radical Conjugate Addition. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201910926] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Heng Jiang
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
| | - Gesa Seidler
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
| | - Armido Studer
- Organisch-Chemisches InstitutWestfälische Wilhelms-Universität Corrensstraß 40 48149 Münster Germany
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17
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Mühlhaus F, Weißbarth H, Dahmen T, Schnakenburg G, Gansäuer A. Merging Regiodivergent Catalysis with Atom-Economical Radical Arylation. Angew Chem Int Ed Engl 2019; 58:14208-14212. [PMID: 31394024 PMCID: PMC6852184 DOI: 10.1002/anie.201908860] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Indexed: 12/11/2022]
Abstract
A titanocene-catalyzed regiodivergent radical arylation is described that allows access to either enantiomerically pure tetrahydroquinolines or indolines from a common starting material. The regioselectivity of epoxide opening that results in the high selectivity of heterocycle formation is controlled by two factors, the absolute configuration of the enantiopure ligands of the (C5 H4 R)2 TiX2 catalyst and the inorganic ligand X (X=Cl, OTs). The overall reaction is atom-economical and constitutes a radical Friedel-Crafts alkylation.
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Affiliation(s)
- Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Tobias Dahmen
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Gregor Schnakenburg
- Institut für Anorganische ChemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard Domagk-Straße 153121BonnGermany
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18
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Mühlhaus F, Weißbarth H, Dahmen T, Schnakenburg G, Gansäuer A. Merging Regiodivergent Catalysis with Atom‐Economical Radical Arylation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201908860] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Hendrik Weißbarth
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Tobias Dahmen
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Gregor Schnakenburg
- Institut für Anorganische Chemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard Domagk-Straße 1 53121 Bonn Germany
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19
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Liu R, Chia SPM, Goh YY, Cheo HW, Fan B, Li R, Zhou R, Wu J. Visible-Light-Mediated Regioselective Allylation, Benzylation, and Silylation of Methylene-Malononitriles via Photoredox-Induced Radical Cation Fragmentation. European J Org Chem 2019. [DOI: 10.1002/ejoc.201900902] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rongfang Liu
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; 00024 Taiyuan P.R. China
| | - Shane Pui Mun Chia
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Republic of Singapore
| | - Yi Yiing Goh
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Republic of Singapore
| | - Han Wen Cheo
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Republic of Singapore
| | - Binbin Fan
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; 00024 Taiyuan P.R. China
| | - Ruifeng Li
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; 00024 Taiyuan P.R. China
| | - Rong Zhou
- College of Chemistry and Chemical Engineering; Taiyuan University of Technology; 00024 Taiyuan P.R. China
| | - Jie Wu
- Department of Chemistry; National University of Singapore; 3 Science Drive 3 117543 Singapore Republic of Singapore
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20
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Liedtke T, Hilche T, Klare S, Gansäuer A. Condition Screening for Sustainable Catalysis in Single-Electron Steps by Cyclic Voltammetry: Additives and Solvents. CHEMSUSCHEM 2019; 12:3166-3171. [PMID: 30779429 DOI: 10.1002/cssc.201900344] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 02/18/2019] [Indexed: 06/09/2023]
Abstract
Cyclic voltammetry-based screening method for Cp2 TiX-catalyzed reactions is extended to the screening of solvents other than tetrahydrofuran for bulk electrolysis of the catalyst and radical arylation. It was found that CH3 CN can be used as a solvent for both processes without additives. Furthermore, in tetrahydrofuran, squaramide L2 is more efficient than the previously reported supramolecular halide binder, Schreiner's thiourea L1. The results extend the usefulness of the proposed time and resource-efficient screening method for designing catalysis reactions in single-electron steps.
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Affiliation(s)
- Theresa Liedtke
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Tobias Hilche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Straße 1, 53121, Bonn, Germany
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21
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Leijendekker LH, Weweler J, Leuther TM, Kratzert D, Streuff J. Development, Scope, and Applications of Titanium(III)-Catalyzed Cyclizations to Aminated N-Heterocycles. Chemistry 2019; 25:3382-3390. [PMID: 30615817 DOI: 10.1002/chem.201805909] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Indexed: 01/30/2023]
Affiliation(s)
- Leonardus H. Leijendekker
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Jens Weweler
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Tobias M. Leuther
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Daniel Kratzert
- Institut für Anorganische und Analytische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
| | - Jan Streuff
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstr. 21 79104 Freiburg im Breisgau Germany
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22
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Luu HT, Streuff J. Development of an Efficient Synthesis of rac
-3-Demethoxyerythratidinone via a Titanium(III) Catalyzed Imine-Nitrile Coupling. European J Org Chem 2018. [DOI: 10.1002/ejoc.201801479] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Hieu-Trinh Luu
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Germany
| | - Jan Streuff
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Germany
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23
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Liedtke T, Spannring P, Riccardi L, Gansäuer A. Mechanism-Based Condition Screening for Sustainable Catalysis in Single-Electron Steps by Cyclic Voltammetry. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201800731] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Theresa Liedtke
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Peter Spannring
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Ludovico Riccardi
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard Domagk-Straße 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard Domagk-Straße 1 53121 Bonn Germany
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24
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Liedtke T, Spannring P, Riccardi L, Gansäuer A. Mechanism-Based Condition Screening for Sustainable Catalysis in Single-Electron Steps by Cyclic Voltammetry. Angew Chem Int Ed Engl 2018; 57:5006-5010. [PMID: 29488673 DOI: 10.1002/anie.201800731] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Revised: 02/22/2018] [Indexed: 12/16/2022]
Abstract
A cyclic-voltammetry-based screening method for Cp2 TiX-catalyzed reactions is introduced. Our mechanism-based approach enables the study of the influence of various additives on the electrochemically generated active catalyst Cp2 TiX, which is in equilibrium with catalytically inactive [Cp2 TiX2 ]- . Thioureas and ureas are most efficient in the generation of Cp2 TiX in THF. Knowing the precise position of the equilibrium between Cp2 TiX and [Cp2 TiX2 ]- allowed us to identify reaction conditions for the bulk electrolysis of Cp2 TiX2 complexes and for Cp2 TiX-catayzed radical arylations without having to carry out the reactions. Our time- and resource-efficient approach is of general interest for the design of catalytic reactions that proceed in single-electron steps.
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Affiliation(s)
- Theresa Liedtke
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Straße 1, 53121, Bonn, Germany
| | - Peter Spannring
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Straße 1, 53121, Bonn, Germany
| | - Ludovico Riccardi
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Straße 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Straße 1, 53121, Bonn, Germany
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25
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Richrath RB, Olyschläger T, Hildebrandt S, Enny DG, Fianu GD, Flowers RA, Gansäuer A. Cp 2 TiX Complexes for Sustainable Catalysis in Single-Electron Steps. Chemistry 2018; 24:6371-6379. [PMID: 29327511 DOI: 10.1002/chem.201705707] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Indexed: 12/18/2022]
Abstract
We present a combined electrochemical, kinetic, and synthetic study with a novel and easily accessible class of titanocene catalysts for catalysis in single-electron steps. The tailoring of the electronic properties of our Cp2 TiX-catalysts that are prepared in situ from readily available Cp2 TiX2 is achieved by varying the anionic ligand X. Of the complexes investigated, Cp2 TiOMs proved to be either equal or substantially superior to the best catalysts developed earlier. The kinetic and thermodynamic properties pertinent to catalysis have been determined. They allow a mechanistic understanding of the subtle interplay of properties required for an efficient oxidative addition and reduction. Therefore, our study highlights that efficient catalysts do not require the elaborate covalent modification of the cyclopentadienyl ligands.
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Affiliation(s)
- Ruben B Richrath
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Theresa Olyschläger
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Sven Hildebrandt
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
| | - Daniel G Enny
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Godfred D Fianu
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Robert A Flowers
- Department of Chemistry, Lehigh University, Bethlehem, PA, 18015, USA
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard Domagk-Str. 1, 53121, Bonn, Germany
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26
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Huang HM, Procter DJ. Radical Heterocyclization and Heterocyclization Cascades Triggered by Electron Transfer to Amide-Type Carbonyl Compounds. Angew Chem Int Ed Engl 2017; 56:14262-14266. [DOI: 10.1002/anie.201708354] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
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27
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Huang HM, Procter DJ. Radical Heterocyclization and Heterocyclization Cascades Triggered by Electron Transfer to Amide-Type Carbonyl Compounds. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708354] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Huan-Ming Huang
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
| | - David J. Procter
- School of Chemistry; University of Manchester; Manchester M13 9PL UK
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28
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Zhang YQ, Vogelsang E, Qu ZW, Grimme S, Gansäuer A. Titanocene-Catalyzed Radical Opening of N-Acylated Aziridines. Angew Chem Int Ed Engl 2017; 56:12654-12657. [PMID: 28833905 DOI: 10.1002/anie.201707673] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Indexed: 12/14/2022]
Abstract
Aziridines activated by N-acylation are opened to the higher substituted radical through electron transfer from titanocene(III) complexes in a novel catalytic reaction. This reaction is applicable in conjugate additions, reductions, and cyclizations and suited for the construction of quaternary carbon centers. The concerted mechanism of the ring opening is indicated by DFT calculations.
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Affiliation(s)
- Yong-Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Elisabeth Vogelsang
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
| | - Zheng-Wang Qu
- Mulliken Center for Theoretical Chemistry, Universität Bonn, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Universität Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121, Bonn, Germany
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29
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Zhang Y, Vogelsang E, Qu Z, Grimme S, Gansäuer A. Titanocene‐Catalyzed Radical Opening of N‐Acylated Aziridines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707673] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yong‐Qiang Zhang
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Strasse 1 53121 Bonn Germany
| | - Elisabeth Vogelsang
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Strasse 1 53121 Bonn Germany
| | - Zheng‐Wang Qu
- Mulliken Center for Theoretical Chemistry Universität Bonn Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry Universität Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Strasse 1 53121 Bonn Germany
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30
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Qin X, Lee MWY, Zhou JS. Nickel‐Catalyzed Asymmetric Reductive Heck Cyclization of Aryl Halides to Afford Indolines. Angew Chem Int Ed Engl 2017; 56:12723-12726. [DOI: 10.1002/anie.201707134] [Citation(s) in RCA: 119] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 08/11/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Xurong Qin
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Marcus Wen Yao Lee
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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31
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Qin X, Lee MWY, Zhou JS. Nickel‐Catalyzed Asymmetric Reductive Heck Cyclization of Aryl Halides to Afford Indolines. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201707134] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Xurong Qin
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Marcus Wen Yao Lee
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
| | - Jianrong Steve Zhou
- Division of Chemistry and Biological Chemistry School of Physical and Mathematical Sciences Nanyang Technological University Singapore 637371 Singapore
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32
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Leijendekker LH, Weweler J, Leuther TM, Streuff J. Katalytische reduktive Synthese und direkte Derivatisierung ungeschützter Aminoindole, Aminopyrrole und Iminoindoline. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201702310] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Leonardus H. Leijendekker
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Deutschland
| | - Jens Weweler
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Deutschland
| | - Tobias M. Leuther
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Deutschland
| | - Jan Streuff
- Institut für Organische Chemie; Albert-Ludwigs-Universität Freiburg; Albertstraße 21 79104 Freiburg im Breisgau Deutschland
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33
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Leijendekker LH, Weweler J, Leuther TM, Streuff J. Catalytic Reductive Synthesis and Direct Derivatization of Unprotected Aminoindoles, Aminopyrroles, and Iminoindolines. Angew Chem Int Ed Engl 2017; 56:6103-6106. [PMID: 28444893 DOI: 10.1002/anie.201702310] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2017] [Indexed: 11/12/2022]
Abstract
A titanium(III)-catalyzed radical cyclization to unprotected 3-aminoindoles, 3-aminopyrroles, or 3-iminoindolines is reported. The reaction is non-hazardous, scalable, and allows facile isolation of the free products by extraction. The method is demonstrated on a large substrate scope and it further allows the direct installation of various nitrogen protecting groups or the synthesis of building blocks for peptide chemistry in a single sequence. Fused bisindoles can be directly accessed from the cyclization products.
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Affiliation(s)
- Leonardus H Leijendekker
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104, Freiburg im Breisgau, Germany
| | - Jens Weweler
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104, Freiburg im Breisgau, Germany
| | - Tobias M Leuther
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104, Freiburg im Breisgau, Germany
| | - Jan Streuff
- Institut für Organische Chemie, Albert-Ludwigs-Universität Freiburg, Albertstrasse 21, 79104, Freiburg im Breisgau, Germany
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34
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Deng H, Cao W, Liu R, Zhang Y, Liu B. Asymmetric Total Synthesis of Hispidanin A. Angew Chem Int Ed Engl 2017; 56:5849-5852. [DOI: 10.1002/anie.201700958] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Indexed: 12/11/2022]
Affiliation(s)
- Heping Deng
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Wei Cao
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Yanhui Zhang
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 China
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35
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Deng H, Cao W, Liu R, Zhang Y, Liu B. Asymmetric Total Synthesis of Hispidanin A. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201700958] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Heping Deng
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Wei Cao
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Rong Liu
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Yanhui Zhang
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
| | - Bo Liu
- Key Laboratory of Green Chemistry & Technology of the Ministry of Education; College of Chemistry; Sichuan University; 29 Wangjiang Rd., Chengdu Sichuan 610064 China
- State Key Laboratory of Natural Medicines; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 China
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36
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Miyabe H, Kawashima A, Yoshioka E, Kohtani S. Progress in Enantioselective Radical Cyclizations. Chemistry 2017; 23:6225-6236. [DOI: 10.1002/chem.201603124] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Indexed: 01/05/2023]
Affiliation(s)
- Hideto Miyabe
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Akira Kawashima
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Eito Yoshioka
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
| | - Shigeru Kohtani
- School of Pharmacy; Hyogo University of Health Sciences, Minatojima, Chuo-ku; Kobe 650-8530 Japan
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37
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Funken N, Mühlhaus F, Gansäuer A. General, Highly Selective Synthesis of 1,3- and 1,4-Difunctionalized Building Blocks by Regiodivergent Epoxide Opening. Angew Chem Int Ed Engl 2016; 55:12030-4. [PMID: 27600090 DOI: 10.1002/anie.201606064] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Revised: 07/22/2016] [Indexed: 12/31/2022]
Abstract
We describe a regiodivergent epoxide opening (REO) featuring a catalyst-controlled synthesis of enantiomerically and diastereomerically highly enriched or pure syn- and anti- 1,3- and 1,4-difunctionalized building blocks from a common epoxide precursor. The REO is attractive for natural product synthesis and as a branching reaction for diversity-oriented synthesis with epoxides.
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Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, 53121, Bonn, Germany.
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38
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Funken N, Mühlhaus F, Gansäuer A. General, Highly Selective Synthesis of 1,3- and 1,4-Difunctionalized Building Blocks by Regiodivergent Epoxide Opening. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201606064] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Nico Funken
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Felix Mühlhaus
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
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39
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Hildebrandt S, Gansäuer A. Synthesis of Dihydropyrrolizine and Tetrahydroindolizine Scaffolds from Pyrroles by Titanocene(III) Catalysis. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603985] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Sven Hildebrandt
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie; Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
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40
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Synthesis of Dihydropyrrolizine and Tetrahydroindolizine Scaffolds from Pyrroles by Titanocene(III) Catalysis. Angew Chem Int Ed Engl 2016; 55:9719-22. [DOI: 10.1002/anie.201603985] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2016] [Revised: 06/01/2016] [Indexed: 01/02/2023]
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41
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Fava E, Millet A, Nakajima M, Loescher S, Rueping M. Reduktive Umpolung von Carbonylderivaten mittels Photoredoxkatalyse mit sichtbarem Licht: ein direkter Zugang zu vicinalen Diaminen und Aminoalkoholen über α-Aminoradikale und Ketylradikale. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511235] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Eleonora Fava
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Anthony Millet
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Masaki Nakajima
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Sebastian Loescher
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
| | - Magnus Rueping
- Institut für Organische Chemie; RWTH Aachen; Landoltweg 1 52074 Aachen Deutschland
- KAUST Catalysis Center (KCC); King Abdullah University of Science and Technology (KAUST); Thuwal 23955-6900 Saudi Arabien
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42
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Fava E, Millet A, Nakajima M, Loescher S, Rueping M. Reductive Umpolung of Carbonyl Derivatives with Visible-Light Photoredox Catalysis: Direct Access to Vicinal Diamines and Amino Alcohols via α-Amino Radicals and Ketyl Radicals. Angew Chem Int Ed Engl 2016; 55:6776-9. [PMID: 27136443 PMCID: PMC5021176 DOI: 10.1002/anie.201511235] [Citation(s) in RCA: 154] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2015] [Revised: 02/07/2016] [Indexed: 11/09/2022]
Abstract
Visible‐light‐mediated photoredox‐catalyzed aldimine–aniline and aldehyde–aniline couplings have been realized. The reductive single electron transfer (SET) umpolung of various carbonyl derivatives enabled the generation of intermediary ketyl and α‐amino radical anions, which were utilized for the synthesis of unsymmetrically substituted 1,2‐diamines and amino alcohols.
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Affiliation(s)
- Eleonora Fava
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Anthony Millet
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Masaki Nakajima
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Sebastian Loescher
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany
| | - Magnus Rueping
- Institute of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074, Aachen, Germany. .,King Abdullah University of Science and Technology (KAUST), KAUST Catalysis Center (KCC), Thuwal, 23955-6900, Saudi Arabia.
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Henriques DSG, Zimmer K, Klare S, Meyer A, Rojo‐Wiechel E, Bauer M, Sure R, Grimme S, Schiemann O, Flowers RA, Gansäuer A. Highly Active Titanocene Catalysts for Epoxide Hydrosilylation: Synthesis, Theory, Kinetics, EPR Spectroscopy. Angew Chem Int Ed Engl 2016; 55:7671-5. [DOI: 10.1002/anie.201601242] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Dina Schwarz G. Henriques
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Katharina Zimmer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Andreas Meyer
- Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Wegelerstraße 12 53115 Bonn Deutschland
| | - Elena Rojo‐Wiechel
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Rebecca Sure
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Olav Schiemann
- Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Wegelerstraße 12 53115 Bonn Deutschland
| | | | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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Henriques DSG, Zimmer K, Klare S, Meyer A, Rojo‐Wiechel E, Bauer M, Sure R, Grimme S, Schiemann O, Flowers RA, Gansäuer A. Hochaktive Titanocen‐Katalysatoren für Epoxid‐Hydrosilylierungen – Synthese, Theorie, Kinetik, EPR‐Spektroskopie. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601242] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dina Schwarz G. Henriques
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Katharina Zimmer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Sven Klare
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Andreas Meyer
- Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Wegelerstraße 12 53115 Bonn Deutschland
| | - Elena Rojo‐Wiechel
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
| | - Mirko Bauer
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Rebecca Sure
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Beringstraße 4 53115 Bonn Deutschland
| | - Olav Schiemann
- Institut für Physikalische Chemie und Theoretische Chemie Universität Bonn Wegelerstraße 12 53115 Bonn Deutschland
| | | | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie Universität Bonn Gerhard-Domagk-Straße 1 53121 Bonn Deutschland
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