51
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Zhang Z, Gevorgyan V. Co-Catalyzed Transannulation of Pyridotriazoles with Isothiocyanates and Xanthate Esters. Org Lett 2020; 22:8500-8504. [PMID: 33044833 PMCID: PMC7655727 DOI: 10.1021/acs.orglett.0c03099] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An efficient radical transannulation reaction of pyridotriazoles with isothiocyanates and xanthate esters was developed. This method features conversion of pyridotriazoles into two N-fused heterocyclic aromatic systems-imino-thiazolopyridines and oxo-thiazolopyridine derivatives-via one-step Co(II)-catalyzed transannulation reaction proceeding via a radical mechanism. The synthetic usefulness of the developed method was illustrated in the synthesis of amino acid derivatives and further transformations of obtained reaction products.
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Affiliation(s)
- Ziyan Zhang
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
| | - Vladimir Gevorgyan
- Department of Chemistry and Biochemistry, University of Texas at Dallas, 800 W. Campbell Road, Richardson, Texas 75080, United States
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52
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Khatua H, Das SK, Roy S, Chattopadhyay B. Dual Reactivity of 1,2,3,4‐Tetrazole: Manganese‐Catalyzed Click Reaction and Denitrogenative Annulation. Angew Chem Int Ed Engl 2020; 60:304-312. [DOI: 10.1002/anie.202009078] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Revised: 09/01/2020] [Indexed: 12/20/2022]
Affiliation(s)
- Hillol Khatua
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Satyajit Roy
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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53
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Khatua H, Das SK, Roy S, Chattopadhyay B. Dual Reactivity of 1,2,3,4‐Tetrazole: Manganese‐Catalyzed Click Reaction and Denitrogenative Annulation. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202009078] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Hillol Khatua
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Satyajit Roy
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug Discovery Centre of Bio-Medical Research (CBMR) SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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54
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Zeng Y, Chiou MF, Zhu X, Cao J, Lv D, Jian W, Li Y, Zhang X, Bao H. Copper-Catalyzed Enantioselective Radical 1,4-Difunctionalization of 1,3-Enynes. J Am Chem Soc 2020; 142:18014-18021. [PMID: 33035049 DOI: 10.1021/jacs.0c06177] [Citation(s) in RCA: 88] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Chiral allenes are important structural motifs frequently found in natural products, pharmaceuticals, and other organic compounds. Asymmetric 1,4-difunctionalization of 1,3-enynes is a promising strategy to construct axial chirality and produce substituted chiral allenes from achiral substrates. However, the previous state of the art in 1,4-difunctionalization of 1,3-enynes focused on the allenyl anion pathway. Because of this, only electrophiles can be introduced into the allene backbones in the second functionalization step, consequently limiting the reaction and allene product types. The development of asymmetric 1,4-difunctionalization of 1,3-enynes via a radical pathway would complement previous methods and support expansion of the toolbox for the synthesis of asymmetric allenes. Herein, we report the first radical enantioselective allene formation via a group transfer pathway in the context of copper-catalyzed radical 1,4-difunctionalization of 1,3-enynes. This method addresses a longstanding unsolved problem in asymmetric radical chemistry, provides an important strategy for stereocontrol with free allenyl radicals, and offers a novel approach to the valuable, but previously inaccessible, chiral allenes. This work should shed light on asymmetric radical reactions and may lead to other enantioselective group transfer reactions.
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Affiliation(s)
- Yuehua Zeng
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Mong-Feng Chiou
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Xiaotao Zhu
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Jie Cao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Daqi Lv
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Wujun Jian
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Yajun Li
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China
| | - Xinhao Zhang
- Laboratory of Computational Chemistry and Drug Design, State Key Laboratory of Chemical Oncogenomics, Peking University Shenzhen Graduate School, Shenzhen 518055, People's Republic of China.,Shenzhen Bay Laboratory, Shenzhen 518055, People's Republic of China
| | - Hongli Bao
- Key Laboratory of Coal to Ethylene Glycol and Its Related Technology, State Key Laboratory of Structural Chemistry, Center for Excellence in Molecular Synthesis, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, 155 Yangqiao Road West, Fuzhou, Fujian 350002, People's Republic of China.,University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
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55
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Baek Y, Das A, Zheng SL, Reibenspies JH, Powers DC, Betley TA. C-H Amination Mediated by Cobalt Organoazide Adducts and the Corresponding Cobalt Nitrenoid Intermediates. J Am Chem Soc 2020; 142:11232-11243. [PMID: 32456423 DOI: 10.1021/jacs.0c04252] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Treatment of (ArL)CoBr (ArL = 5-mesityl-1,9-(2,4,6-Ph3C6H2)dipyrrin) with a stoichiometric amount of 1-azido-4-(tert-butyl)benzene N3(C6H4-p-tBu) furnished the corresponding four-coordinate organoazide-bound complex (ArL)CoBr(N3(C6H4-p-tBu)). Spectroscopic and structural characterization of the complex indicated redox innocent ligation of the organoazide. Slow expulsion of dinitrogen (N2) was observed at room temperature to afford a ligand functionalized product via a [3 + 2] annulation, which can be mediated by a high-valent nitrene intermediate such as a CoIII iminyl (ArL)CoBr(•N(C6H4-p-tBu)) or CoIV imido (ArL)CoBr(N(C6H4-p-tBu)) complex. The presence of the proposed intermediate and its viability as a nitrene group transfer reagent are supported by intermolecular C-H amination and aziridination reactivities. Unlike (ArL)CoBr(N3(C6H4-p-tBu)), a series of alkyl azide-bound CoII analogues expel N2 only above 60 °C, affording paramagnetic intermediates that convert to the corresponding Co-imine complexes via α-H-atom abstraction. The corresponding N2-released structures were observed via single-crystal-to-crystal transformation, suggesting formation of a Co-nitrenoid intermediate in solid-state. Alternatively, the alkyl azide-bound congeners supported by a more sterically accessible dipyrrinato scaffold tBuL (tBuL = 5-mesityl-(1,9-di-tert-butyl)dipyrrin) facilitate intramolecular 1,3-dipolar cycloaddition as well as C-H amination to furnish 1,2,3-dihydrotriazole and substituted pyrrolidine products, respectively. For the C-H amination, we observe that the temperature required for azide activation varies depending on the presence of weak C-H bonds, suggesting that the alkyl azide adducts serve as viable species for C-H amination when the C-H bonds are (1) proximal to the azide moiety and (2) sufficiently weak to be activated.
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Affiliation(s)
- Yunjung Baek
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Anuvab Das
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Shao-Liang Zheng
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
| | - Joseph H Reibenspies
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - David C Powers
- Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Theodore A Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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56
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Alcântara AFP, Fontana LA, Almeida MP, Rigolin VH, Ribeiro MA, Barros WP, Megiatto JD. Control over the Redox Cooperative Mechanism of Radical Carbene Transfer Reactions for the Efficient Active‐Metal‐Template Synthesis of [2]Rotaxanes. Chemistry 2020; 26:7808-7822. [DOI: 10.1002/chem.201905602] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Indexed: 02/01/2023]
Affiliation(s)
- Arthur F. P. Alcântara
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
- Instituto Federal do Sertão Pernambucano Estrada do Tamboril 56200-000 Ouricuri Brazil
| | - Liniquer A. Fontana
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
| | - Marlon P. Almeida
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
| | - Vitor H. Rigolin
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
| | - Marcos A. Ribeiro
- Departamento de QuímicaUniversidade Federal do Espírito Santo Av. Fernando Ferrari, 514 29075-910 Vitória Brazil
| | - Wdeson P. Barros
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
| | - Jackson D. Megiatto
- Institute of ChemistryUniversity of Campinas (UNICAMP) PO Box 6154 13083-970 Campinas Brazil
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57
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Hwang Y, Jung H, Lee E, Kim D, Chang S. Quantitative Analysis on Two-Point Ligand Modulation of Iridium Catalysts for Chemodivergent C–H Amidation. J Am Chem Soc 2020; 142:8880-8889. [DOI: 10.1021/jacs.0c02079] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Yeongyu Hwang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Hoimin Jung
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Euijae Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Dongwook Kim
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, South Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science (IBS), Daejeon 34141, South Korea
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58
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Liu CY, Angamuthu V, Chen WC, Hou DR. Synthesis of Methyl l-Kijanosides by Regio- and Stereoselective Ring Opening of 2-Oxazolidinone -Fused Aziridines. Org Lett 2020; 22:2246-2250. [PMID: 32115955 DOI: 10.1021/acs.orglett.0c00443] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Kijanose is one of the most highly functionalized deoxysugars found in nature and a challenging synthetic target. We found that the ring opening of trisubstituted, 2-oxazolidinone-fused aziridines is regio- and stereoselective, and the azide adduct has the same stereochemistry as that of kijanose after converting the azido to a nitro group. Therefore, both α- and β-methyl l-kijanosides were prepared from ethyl l-lactate in 14% total yield.
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Affiliation(s)
- Chi-Yun Liu
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001, Taiwan
| | - Venkatachalam Angamuthu
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001, Taiwan
| | - Wei-Chen Chen
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001, Taiwan
| | - Duen-Ren Hou
- Department of Chemistry, National Central University, No. 300 Jhong-Da Road, Jhong-li, Taoyuan 32001, Taiwan
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59
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Catalytic enantioselective desymmetrizing functionalization of alkyl radicals via Cu(i)/CPA cooperative catalysis. Nat Catal 2020. [DOI: 10.1038/s41929-020-0439-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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60
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Wang G, Zhou Z, Shen X, Ivlev S, Meggers E. Asymmetric catalysis with a chiral-at-osmium complex. Chem Commun (Camb) 2020; 56:7714-7717. [PMID: 32538391 DOI: 10.1039/d0cc03280h] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The first example of a chiral osmium catalyst is reported in which the overall chirality originates exclusively from a stereogenic metal center (metal-centered chirality) with all coordinating ligands being achiral. The non-C2-symmetric chiral-at-metal complex contains two cyclometalated 7-methyl-1,7-phenanthrolinium heterocycles which can be described as two chelating pyridylidene remote N-heterocyclic carbene (rNHC) ligands. The octahedral coordination sphere is completed with one CO and one acetonitrile ligand. A monodentate chiral oxazoline ligand is used as a chiral auxiliary ligand to obtain enantiomerically pure chiral-at-osmium complexes (>99 : 1 e.r.). Finally, it is demonstrated that the developed chiral-at-osmium complex is suitable for ring-closing enantioselective C(sp3)-H aminations, including the first example of catalytic enantioselective cyclizations of azidoformates to chiral 2-oxazolidinones.
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Affiliation(s)
- Guanghui Wang
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
| | - Zijun Zhou
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
| | - Xiang Shen
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
| | - Sergei Ivlev
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universitat Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany.
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61
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Elsby MR, Baker RT. Strategies and mechanisms of metal–ligand cooperativity in first-row transition metal complex catalysts. Chem Soc Rev 2020; 49:8933-8987. [DOI: 10.1039/d0cs00509f] [Citation(s) in RCA: 86] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The use of metal–ligand cooperation (MLC) by transition metal bifunctional catalysts has emerged at the forefront of homogeneous catalysis science.
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Affiliation(s)
- Matthew R. Elsby
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation
- University of Ottawa
- Ottawa
- Canada
| | - R. Tom Baker
- Department of Chemistry and Biomolecular Sciences and Centre for Catalysis Research and Innovation
- University of Ottawa
- Ottawa
- Canada
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62
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Azek E, Spitz C, Ernzerhof M, Lebel H. A Mechanistic Study of the Stereochemical Outcomes of Rhodium‐Catalysed Styrene Aziridinations. Adv Synth Catal 2019. [DOI: 10.1002/adsc.201901184] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Emna Azek
- Département de Chimie and Centre in Green Chemistry and Catalysis (CGCC)Université de Montréal C.P. 6128, Succursale Centre-ville Montréal, Québec Canada H3C 3J7
| | - Cédric Spitz
- Département de Chimie and Centre in Green Chemistry and Catalysis (CGCC)Université de Montréal C.P. 6128, Succursale Centre-ville Montréal, Québec Canada H3C 3J7
| | - Matthias Ernzerhof
- Département de Chimie and Centre in Green Chemistry and Catalysis (CGCC)Université de Montréal C.P. 6128, Succursale Centre-ville Montréal, Québec Canada H3C 3J7
| | - Hélène Lebel
- Département de Chimie and Centre in Green Chemistry and Catalysis (CGCC)Université de Montréal C.P. 6128, Succursale Centre-ville Montréal, Québec Canada H3C 3J7
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63
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Hu Y, Lang K, Li C, Gill JB, Kim I, Lu H, Fields KB, Marshall M, Cheng Q, Cui X, Wojtas L, Zhang XP. Enantioselective Radical Construction of 5-Membered Cyclic Sulfonamides by Metalloradical C-H Amination. J Am Chem Soc 2019; 141:18160-18169. [PMID: 31622088 DOI: 10.1021/jacs.9b08894] [Citation(s) in RCA: 70] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Both arylsulfonyl and alkylsulfonyl azides can be effectively activated by the cobalt(II) complexes of D2-symmetric chiral amidoporphyrins for enantioselective radical 1,5-C-H amination to stereoselectively construct 5-membered cyclic sulfonamides. In addition to C-H bonds with varied electronic properties, the Co(II)-based metalloradical system features chemoselective amination of allylic C-H bonds and is compatible with heteroaryl groups, producing functionalized 5-membered chiral cyclic sulfonamides in high yields with high enantioselectivities. The unique profile of reactivity and selectivity of the Co(II)-catalyzed C-H amination is attributed to its underlying stepwise radical mechanism, which is supported by several lines of experimental evidence.
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Affiliation(s)
- Yang Hu
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Chaoqun Li
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Joseph B Gill
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Isaac Kim
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
| | - Hongjian Lu
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Kimberly B Fields
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - McKenzie Marshall
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Qigan Cheng
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Xin Cui
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - Lukasz Wojtas
- Department of Chemistry , University of South Florida , Tampa , Florida 33620-5250 , United States
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill , Massachusetts 02467 , United States
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64
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Giménez‐Nueno I, Guasch J, Funes‐Ardoiz I, Maseras F, Matheu MI, Castillón S, Díaz Y. Enantioselective Synthesis of 3‐Heterosubstituted‐2‐amino‐1‐ols by Sequential Metal‐Free Diene Aziridination/Kinetic Resolution. Chemistry 2019; 25:12628-12635. [DOI: 10.1002/chem.201902734] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 07/04/2019] [Indexed: 12/16/2022]
Affiliation(s)
- Irene Giménez‐Nueno
- Department de Química Analítica i Química OrgànicaUniversitat Rovira I Virgili C/ Marcel⋅lí Domingo no. 1 43007 Tarragona Spain
| | - Joan Guasch
- Department de Química Analítica i Química OrgànicaUniversitat Rovira I Virgili C/ Marcel⋅lí Domingo no. 1 43007 Tarragona Spain
| | - Ignacio Funes‐Ardoiz
- Institut Català de Investigació Química (ICIQ)The Barcelona Institut of Science and Technology C/Paisos Catalans 16 43007 Tarragona Spain
| | - Feliu Maseras
- Institut Català de Investigació Química (ICIQ)The Barcelona Institut of Science and Technology C/Paisos Catalans 16 43007 Tarragona Spain
- Departament de QuímicaUniversitat Autònoma de Barcelona 08913 Bellatera Spain
| | - M. Isabel Matheu
- Department de Química Analítica i Química OrgànicaUniversitat Rovira I Virgili C/ Marcel⋅lí Domingo no. 1 43007 Tarragona Spain
| | - Sergio Castillón
- Department de Química Analítica i Química OrgànicaUniversitat Rovira I Virgili C/ Marcel⋅lí Domingo no. 1 43007 Tarragona Spain
| | - Yolanda Díaz
- Department de Química Analítica i Química OrgànicaUniversitat Rovira I Virgili C/ Marcel⋅lí Domingo no. 1 43007 Tarragona Spain
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65
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Roy S, Khatua H, Das SK, Chattopadhyay B. Iron(II)‐Based Metalloradical Activation: Switch from Traditional Click Chemistry to Denitrogenative Annulation. Angew Chem Int Ed Engl 2019; 58:11439-11443. [DOI: 10.1002/anie.201904702] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Revised: 05/27/2019] [Indexed: 12/27/2022]
Affiliation(s)
- Satyajit Roy
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Hillol Khatua
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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66
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Lang K, Torker S, Wojtas L, Zhang XP. Asymmetric Induction and Enantiodivergence in Catalytic Radical C-H Amination via Enantiodifferentiative H-Atom Abstraction and Stereoretentive Radical Substitution. J Am Chem Soc 2019; 141:12388-12396. [PMID: 31280562 DOI: 10.1021/jacs.9b05850] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Control of enantioselectivity remains a major challenge in radical chemistry. The emergence of metalloradical catalysis (MRC) offers a conceptually new strategy for addressing this and other outstanding issues. Through the employment of D2-symmetric chiral amidoporphyrins as the supporting ligands, Co(II)-based MRC has enabled the development of new catalytic systems for asymmetric radical transformations with a unique profile of reactivity and selectivity. With the support of new-generation HuPhyrin chiral ligands whose cavity environment can be fine-tuned, the Co-centered d-radicals enable to address challenging issues that require exquisite control of fundamental radical processes. As showcased with asymmetric 1,5-C-H amination of sulfamoyl azides, the enantiocontrol of which has proven difficult, the judicious use of HuPhyrin ligand by tuning the bridge length and other remote nonchiral elements allows for controlling both the degree and sense of asymmetric induction in a systematic manner. This effort leads to successful development of new Co(II)-based catalytic systems that are highly effective for enantiodivergent radical 1,5-C-H amination, producing both enantiomers of the strained five-membered cyclic sulfamides with excellent enantioselectivities. Detailed deuterium-labeling studies, together with DFT computation, have revealed an unprecedented mode of asymmetric induction that consists of enantiodifferentiative H-atom abstraction and stereoretentive radical substitution.
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Affiliation(s)
- Kai Lang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
| | - Sebastian Torker
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
| | - Lukasz Wojtas
- Department of Chemistry , University of South Florida , Tampa , Florida 33620 , United States
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center , Boston College , Chestnut Hill, Massachusetts 02467 , United States
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67
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Lei H, Conway JH, Cook CC, Rovis T. Ligand Controlled Ir-Catalyzed Regiodivergent Oxyamination of Unactivated Alkenes. J Am Chem Soc 2019; 141:11864-11869. [PMID: 31310537 DOI: 10.1021/jacs.9b06366] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An intramolecular Ir(III)-catalyzed regiodivergent oxyamination of unactivated alkenes provides valuable γ-lactams, γ-lactones and δ-lactams. The regioselectivity is controlled by the electronically tunable cyclopentadienyl Ir(III)-complexes enabling oxyamination via either 5-exo or 6-endo pathways. With respect to the mechanism, we propose a highly reactive [3.1.0] bicycle intermediate derived from Ir(V) nitrene-mediated aziridination to be a key intermediate toward the synthesis of γ-lactams.
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Affiliation(s)
- Honghui Lei
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - John H Conway
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Caleb C Cook
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
| | - Tomislav Rovis
- Department of Chemistry , Columbia University , New York , New York 10027 , United States
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68
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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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69
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Roy S, Khatua H, Das SK, Chattopadhyay B. Iron(II)‐Based Metalloradical Activation: Switch from Traditional Click Chemistry to Denitrogenative Annulation. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201904702] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Satyajit Roy
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Hillol Khatua
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Sandip Kumar Das
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
| | - Buddhadeb Chattopadhyay
- Division of Molecular Synthesis & Drug DiscoveryCentre of Bio-Medical Research (CBMR)SGPGIMS Campus Raebareli Road Lucknow 226014 U.P. India
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70
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Hong SY, Chang S. Stereodefined Access to Lactams via Olefin Difunctionalization: Iridium Nitrenoids as a Motif of LUMO-Controlled Dipoles. J Am Chem Soc 2019; 141:10399-10408. [DOI: 10.1021/jacs.9b04317] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Seung Youn Hong
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
| | - Sukbok Chang
- Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 34141, Korea
- Center for Catalytic Hydrocarbon Functionalizations, Institute for Basic Science, Daejeon 34141, Korea
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71
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Strekalova S, Khrizanforov M, Budnikova Y. Evaluation of Transition Metal Catalysts in Electrochemically Induced Aromatic Phosphonation. Molecules 2019; 24:molecules24091823. [PMID: 31083594 PMCID: PMC6540189 DOI: 10.3390/molecules24091823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2019] [Revised: 05/08/2019] [Accepted: 05/09/2019] [Indexed: 11/16/2022] Open
Abstract
Voltammetry provides important information on the redox properties of catalysts (transition metal complexes of Ni, Co, Mn, etc.) and their activity in electrocatalytic reactions of aromatic C–H phosphonation in the presence of a phosphorus precursor, for example, dialkyl-H-phosphonate. Based on catalytic current growth of oxidation or reduction of the metal catalysts (CoII, MnII, NiII, MnII/NiII, MnII/CoII, and CoII/NiII), quantitative characteristics of the regeneration of catalysts were determined, for example, for MnII, NiII and MnII/NiII, CoII/NiII pairs. Calculations confirmed the previously made synthetic observations on the synergistic effect of certain metal ions in binary catalytic systems (MnIIbpy/NiIIbpy and NiIIbpy/CoIIbpy); for mixtures, the observed rate constants, or TOF, were 690 s−1 and 721 s−1, respectively, and product yields were higher for monometallic catalytic systems (up to 71% for bimetallic catalytic systems and ~30% for monometallic catalytic systems). In some cases, the appearance of pre-waves after adding H-phosphonates confirmed the preceding chemical reaction. It also confirmed the formation of metal phosphonates in the time scale of voltammetry, oxidizing or reducing at lower potentials than the original (RO)2P(O)H and metal complex, which could be used for fast diagnostics of metal ion and dialkyl-H-phosphonate interactions. Electrochemical transfer of an electron to (from) metal phosphonate generates a phosphonyl radical, which can then react with different arenes to give the products of aromatic C–H phosphonation.
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Affiliation(s)
- Sofia Strekalova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 420088 Kazan, Russia.
| | - Mikhail Khrizanforov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 420088 Kazan, Russia.
| | - Yulia Budnikova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, 420088 Kazan, Russia.
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72
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Hong K, Su H, Pei C, Lv X, Hu W, Qiu L, Xu X. Rhodium-Catalyzed Nitrene/Alkyne Metathesis: An Enantioselective Process for the Synthesis of N-Heterocycles. Org Lett 2019; 21:3328-3331. [DOI: 10.1021/acs.orglett.9b01074] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kemiao Hong
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Han Su
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Chao Pei
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinxin Lv
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China
| | - Wenhao Hu
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China
| | - Lihua Qiu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
| | - Xinfang Xu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China
- Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou, Guangdong 510006, China
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73
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Lankelma M, Olivares AM, de Bruin B. [Co(TPP)]-Catalyzed Formation of Substituted Piperidines. Chemistry 2019; 25:5658-5663. [PMID: 30844097 PMCID: PMC6563703 DOI: 10.1002/chem.201900587] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Indexed: 01/12/2023]
Abstract
Radical cyclization via cobalt(III)-carbene radical intermediates is a powerful method for the synthesis of (hetero)cyclic structures. Building on the recently reported synthesis of five-membered N-heterocyclic pyrrolidines catalyzed by CoII porphyrins, the [Co(TPP)]-catalyzed formation of useful six-membered N-heterocyclic piperidines directly from linear aldehydes is presented herein. The piperidines were obtained in overall high yields, with linear alkenes being formed as side products in small amounts. A DFT study was performed to gain a deeper mechanistic understanding of the cobalt(II)-porphyrin-catalyzed formation of pyrrolidines, piperidines, and linear alkenes. The calculations showed that the alkenes are unlikely to be formed through an expected 1,2-hydrogen-atom transfer to the carbene carbon. Instead, the calculations were consistent with a pathway involving benzyl-radical formation followed by radical-rebound ring closure to form the piperidines. Competitive 1,5-hydrogen-atom transfer from the β-position to the benzyl radical explained the formation of linear alkenes as side products.
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Affiliation(s)
- Marianne Lankelma
- Van 't Hoff Institute for Molecular Sciences (HIMS)Homogeneous, Supramolecular & Bio-Inspired CatalysisUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
| | - Astrid M. Olivares
- Department of ChemistryUniversity of Rochester404 Hutchison HallRochesterNY14627-0216USA
| | - Bas de Bruin
- Van 't Hoff Institute for Molecular Sciences (HIMS)Homogeneous, Supramolecular & Bio-Inspired CatalysisUniversity of AmsterdamScience Park 9041098 XHAmsterdamThe Netherlands
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74
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Guo J, Wang H, Xing S, Hong X, Lu Z. Cobalt-Catalyzed Asymmetric Synthesis of gem-Bis(silyl)alkanes by Double Hydrosilylation of Aliphatic Terminal Alkynes. Chem 2019. [DOI: 10.1016/j.chempr.2019.02.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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75
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Zhang Z, Richrath RB, Gansäuer A. Merging Catalysis in Single Electron Steps with Photoredox Catalysis—Efficient and Sustainable Radical Chemistry. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00787] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Zhenhua Zhang
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Ruben B. Richrath
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
| | - Andreas Gansäuer
- Kekulé-Institut für Organische Chemie und Biochemie, Rheinische Friedrich-Wilhelms-Universität Bonn, Gerhard-Domagk-Straße 1, 53121 Bonn, Germany
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76
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Heins SP, Zhang B, MacMillan SN, Cundari TR, Wolczanski PT. Oxidative Additions to Ti(IV) in [(dadi)4–]TiIV(THF) Involve Carbon–Carbon Bond Formation and Redox-Noninnocent Behavior. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00930] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Spencer P. Heins
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Bufan Zhang
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Samantha N. MacMillan
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Thomas R. Cundari
- Department of Chemistry, CASCaM, University of North Texas, Denton, Texas 76201, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
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77
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Hu Y, Lang K, Tao J, Marshall MK, Cheng Q, Cui X, Wojtas L, Zhang XP. Next-Generation D 2 -Symmetric Chiral Porphyrins for Cobalt(II)-Based Metalloradical Catalysis: Catalyst Engineering by Distal Bridging. Angew Chem Int Ed Engl 2019; 58:2670-2674. [PMID: 30601601 PMCID: PMC6456056 DOI: 10.1002/anie.201812379] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Indexed: 11/09/2022]
Abstract
Novel D2 -symmetric chiral amidoporphyrins with alkyl bridges across two chiral amide units on both sides of the porphyrin plane (designated "HuPhyrin") have been effectively constructed in a modular fashion to permit variation of the bridge length. The CoII complexes of HuPhyrin, [Co(HuPhyrin)], represent new-generation metalloradical catalysts where the metal-centered d-radical is situated inside a cavity-like ligand with a more rigid chiral environment and enhanced hydrogen-bonding capability. As demonstrated with cyclopropanation and aziridination as model reactions, the bridged [Co(HuPhyrin)] functions notably different from the open catalysts, exhibiting significant enhancement in both reactivity and stereoselectivity. Furthermore, the length of the distal alkyl bridge can have a remarkable influence on the catalytic properties.
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Affiliation(s)
- Yang Hu
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
| | - Jingran Tao
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | | | - Qigan Cheng
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Xin Cui
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida, Tampa, FL, 33620, USA
| | - X Peter Zhang
- Department of Chemistry, Merkert Chemistry Center, Boston College, Chestnut Hill, MA, 02467, USA
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78
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van der Vlugt JI. Radical-Type Reactivity and Catalysis by Single-Electron Transfer to or from Redox-Active Ligands. Chemistry 2019; 25:2651-2662. [PMID: 30084211 PMCID: PMC6471147 DOI: 10.1002/chem.201802606] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Indexed: 12/12/2022]
Abstract
Controlled ligand-based redox-activity and chemical non-innocence are rapidly gaining importance for selective (catalytic) processes. This Concept aims to provide an overview of the progress regarding ligand-to-substrate single-electron transfer as a relatively new mode of operation to exploit ligand-centered reactivity and catalysis based thereon.
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Affiliation(s)
- Jarl Ivar van der Vlugt
- Bio-Inspired Homogeneous and Supramolecular Catalysis Groupvan ‘t Hoff Institute for Molecular SciencesUniversity of AmsterdamScience Park 9041098 XHAmsterdamNetherlands
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79
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Hu Y, Lang K, Tao J, Marshall MK, Cheng Q, Cui X, Wojtas L, Zhang XP. Next‐Generation
D
2
‐Symmetric Chiral Porphyrins for Cobalt(II)‐Based Metalloradical Catalysis: Catalyst Engineering by Distal Bridging. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201812379] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yang Hu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Kai Lang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Jingran Tao
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | | | - Qigan Cheng
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xin Cui
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - X. Peter Zhang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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80
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Dey S, Wayland BB, Zdilla MJ. Solution and Solid State Properties for Low-Spin Cobalt(II) Dibenzotetramethyltetraaza[14]annulene [(tmtaa)Co II] and the Monopyridine Complex. Inorg Chem 2019; 58:1224-1233. [PMID: 30618250 DOI: 10.1021/acs.inorgchem.8b02644] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The single-crystal X-ray structure of solvent-free (tmtaa)CoII reveals three different π-π intermacrocyclic interactions between tmtaa units (tmtaa = dibenzotetramethyltetraaza[14]annulene). Pairs of inequivalent (tmtaa)CoII units in the unit cell link into a one-dimensional π-π stacked array in the solid state. Magnetic susceptibility (χ) studies from 300 to 2 K reveal the effects of intermolecular interactions between (tmtaa)CoII units in the solid state. The effective magnetic moment per CoII center is constant at 2.83 μB from 300 to 100 K and begins to significantly decrease at lower temperatures. The magnetic data are fit to a singlet ( S = 0) ground state with a triplet ( S = 1) excited state that is 13 cm-1 higher in energy (-2 J = 13 cm-1). Toluene solutions of (tmtaa)CoII have 1H nuclear magnetic resonance (NMR) paramagnetic shifts, a solution-phase magnetic moment μeff (295 K) of 2.1 μB, and toluene glass electron paramagnetic resonance spectra that are most consistent with a low-spin ( S = 1/2) CoII with the unpaired electron located in the d yz orbital. Pyridine interacts with (tmtaa)CoII to form a five-coordinate monopyridine complex in which the unpaired electron is in the d z2 orbital. The five-coordinate complex has been structurally characterized by single-crystal X-ray diffraction, and the equilibrium constant for pyridine binding at 295 K has been evaluated by both electronic and 1H NMR spectra. Density functional theory computation using the UB3LYP hybrid functional places the unpaired electron for (tmtaa)CoII in the d yz orbital and that for the monopyridine complex in the d z2 orbital, consistent with spectroscopic observations.
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Affiliation(s)
- Soumyajit Dey
- Department of Chemistry , Temple University , 1901 Northy 13th Street , Philadelphia , Pennsylvania 19122 , United States
| | - Bradford B Wayland
- Department of Chemistry , Temple University , 1901 Northy 13th Street , Philadelphia , Pennsylvania 19122 , United States
| | - Michael J Zdilla
- Department of Chemistry , Temple University , 1901 Northy 13th Street , Philadelphia , Pennsylvania 19122 , United States
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81
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Frost GB, Mittelstaedt MN, Douglas CJ. Chemoselectivity for Alkene Cleavage by Palladium-Catalyzed Intramolecular Diazo Group Transfer from Azide to Alkene. Chemistry 2019; 25:1727-1732. [DOI: 10.1002/chem.201805904] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Indexed: 01/30/2023]
Affiliation(s)
- Grant B. Frost
- Department of Chemistry; University of Minnesota Twin Cities, Smith Hall; 207 Pleasant St SE Minneapolis MN 55455 USA
| | - Michaela N. Mittelstaedt
- Department of Chemistry; University of Minnesota Twin Cities, Smith Hall; 207 Pleasant St SE Minneapolis MN 55455 USA
| | - Christopher J. Douglas
- Department of Chemistry; University of Minnesota Twin Cities, Smith Hall; 207 Pleasant St SE Minneapolis MN 55455 USA
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82
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Huang HM, Garduño-Castro MH, Morrill C, Procter DJ. Catalytic cascade reactions by radical relay. Chem Soc Rev 2019; 48:4626-4638. [DOI: 10.1039/c8cs00947c] [Citation(s) in RCA: 135] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Catalytic radical relays are an attractive tool for the rapid construction of complex molecular architectures.
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83
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Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp 3 )-H Bonds. Angew Chem Int Ed Engl 2018; 57:16837-16841. [PMID: 30347505 PMCID: PMC6339699 DOI: 10.1002/anie.201808923] [Citation(s) in RCA: 93] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Indexed: 12/20/2022]
Abstract
A new catalytic radical system involving CoII -based metalloradical catalysis is effective in activating sulfamoyl azides for enantioselective radical 1,6-amination of C(sp3 )-H bonds, affording six-membered chiral heterocyclic sulfamides in high yields with excellent enantioselectivities. The CoII -catalyzed C-H amination features an unusual degree of functional-group tolerance and chemoselectivity. The unique reactivity and stereoselectivity is attributed to the underlying stepwise radical pathway. The resulting optically active cyclic sulfamides can be readily converted into synthetically useful chiral 1,3-diamine derivatives without loss in enantiopurity.
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Affiliation(s)
- Chaoqun Li
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Kai Lang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
| | - Hongjian Lu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Yang Hu
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Xin Cui
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - Lukasz Wojtas
- Department of Chemistry, University of South Florida Tampa, FL 33620 (USA)
| | - X. Peter Zhang
- Department of Chemistry, Merkert Chemistry Center Boston College, Chestnut Hill, MA 02467 (USA)
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84
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Li C, Lang K, Lu H, Hu Y, Cui X, Wojtas L, Zhang XP. Catalytic Radical Process for Enantioselective Amination of C(sp
3
)−H Bonds. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201808923] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Chaoqun Li
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Kai Lang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
| | - Hongjian Lu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Yang Hu
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Xin Cui
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - Lukasz Wojtas
- Department of Chemistry University of South Florida Tampa FL 33620 USA
| | - X. Peter Zhang
- Department of Chemistry Merkert Chemistry Center Boston College Chestnut Hill MA 02467 USA
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85
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Zhang PC, Wang Y, Zhang ZM, Zhang J. Gold(I)/Xiang-Phos-Catalyzed Asymmetric Intramolecular Cyclopropanation of Indenes and Trisubstituted Alkenes. Org Lett 2018; 20:7049-7052. [PMID: 30371087 DOI: 10.1021/acs.orglett.8b02999] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The first intramolecular enantioselective cyclopropanation of indenes and trisubstituted alkenes was accomplished by using new chiral phosphine X5 derived gold(I) complexes. This reaction is a straightforward, efficient method for constructing [5-3-6] fused-ring compounds with two vicinal all-carbon quaternary stereogenic centers, a core structure shared by numerous pharmacological products, and bioactive compounds. The salient features of this transformation include high enantioselectivity (up to >98% ee), excellent yield (>97%), and nice functional group tolerance.
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Affiliation(s)
- Pei-Chao Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry , East China Normal University , 3663 North Zhongshan Road , Shanghai 200062 , P. R. China
| | - Yidong Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry , East China Normal University , 3663 North Zhongshan Road , Shanghai 200062 , P. R. China
| | - Zhan-Ming Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry , East China Normal University , 3663 North Zhongshan Road , Shanghai 200062 , P. R. China
| | - Junliang Zhang
- Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry , East China Normal University , 3663 North Zhongshan Road , Shanghai 200062 , P. R. China.,Department of Chemistry , Fudan University , 2005 Songhu Road , Shanghai 2000438 , P. R. China
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86
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Hong SY, Son J, Kim D, Chang S. Ir(III)-Catalyzed Stereoselective Haloamidation of Alkynes Enabled by Ligand Participation. J Am Chem Soc 2018; 140:12359-12363. [PMID: 30217108 DOI: 10.1021/jacs.8b08134] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Described herein is the application of a strategy of ligand participation for the Ir-catalyzed imido transfer into alkynes. On the basis of a stoichiometric [3 + 2] cycloaddition of Cp*Ir(III)(κ2- N, O-chelate) with alkynyl dioxazolone, a catalytic haloamidation was developed for the first time by employing [Cp*IrCl2]2 precatalyst and NaX salts (X = Cl or Br) as practical halide sources to furnish synthetically versatile Z-(halovinyl)lactams with excellent stereoselectivity.
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Affiliation(s)
- Seung Youn Hong
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science , Daejeon 34141 , Korea
| | - Junsoo Son
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science , Daejeon 34141 , Korea
| | - Dongwook Kim
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science , Daejeon 34141 , Korea
| | - Sukbok Chang
- Department of Chemistry , Korea Advanced Institute of Science and Technology , Daejeon 34141 , Korea.,Center for Catalytic Hydrocarbon Functionalizations , Institute for Basic Science , Daejeon 34141 , Korea
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87
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Huang MH, Hao WJ, Jiang B. Recent Advances in Radical-Enabled Bicyclization and Annulation/1,n
-Bifunctionalization Reactions. Chem Asian J 2018; 13:2958-2977. [DOI: 10.1002/asia.201801119] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Min-Hua Huang
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
- Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing 210009, Jiangsu P. R. China
| | - Wen-Juan Hao
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
| | - Bo Jiang
- School of Chemistry & Materials Science; Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials; Jiangsu Normal University; Xuzhou 221116 P. R. China
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88
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Prasanthi AVG, Begum S, Srivastava HK, Tiwari SK, Singh R. Iron-Catalyzed Arene C–H Amidation Using Functionalized Hydroxyl Amines at Room Temperature. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02939] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- A. V. G. Prasanthi
- Organic Synthesis and Process Chemistry Division, CSIR—Indian Institute of Chemical Technology, Hyderabad, Telangana-500007, India
| | - Samiyara Begum
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam-781039, India
| | - Hemant Kumar Srivastava
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam-781039, India
| | - Sandip Kumar Tiwari
- Centre of Bio-Medical Research, SGPGI Campus, Raebareli Road, Lucknow, Uttar Pradesh-226014, India
| | - Ritesh Singh
- National Institute of Pharmaceutical Education and Research (NIPER), Raebareli, Uttar Pradesh-229010, India
- Organic Synthesis and Process Chemistry Division, CSIR—Indian Institute of Chemical Technology, Hyderabad, Telangana-500007, India
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89
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Zhang Y, Dong X, Wu Y, Li G, Lu H. Visible-Light-Induced Intramolecular C(sp2)–H Amination and Aziridination of Azidoformates via a Triplet Nitrene Pathway. Org Lett 2018; 20:4838-4842. [DOI: 10.1021/acs.orglett.8b01980] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yipin Zhang
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Xunqing Dong
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Yanan Wu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
| | - Guigen Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, Texas 79409-1061, United States
| | - Hongjian Lu
- Institute of Chemistry & BioMedical Sciences, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China
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90
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Buttar S, Caine J, Goné E, Harris R, Gillman J, Atienza R, Gupta R, Sogi KM, Jain L, Abascal NC, Levine Y, Repka LM, Rojas CM. Glycal Metallanitrenes for 2-Amino Sugar Synthesis: Amidoglycosylation of Gulal-, Allal-, Glucal-, and Galactal 3-Carbamates. J Org Chem 2018; 83:8054-8080. [PMID: 29979042 PMCID: PMC6662188 DOI: 10.1021/acs.joc.8b00893] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The rhodium(II)-catalyzed oxidative cyclization of glycal 3-carbamates with in situ incorporation of an alcohol nucleophile at the anomeric position provides access to a range of 2-amino sugars having 1,2-trans-2,3-cis stereochemistry, a structural motif present in compounds of medicinal and biological significance such as the streptothricin group of antibiotics and the Chitinase inhibitor allosamidin. All of the diastereomeric d-glycal 3-carbamates have been investigated, revealing significant differences in anomeric stereoselectivity depending on substrate stereochemistry and protecting groups. In addition, some substrates were prone to forming C3-oxidized dihydropyranone byproducts under the reaction conditions. Allal- and gulal 3-carbamates provided uniformly high stereo- and chemoselectivity, while for glucal substrates, acyclic, electron-withdrawing protecting groups at the 4 O and 6 O positions were required. Galactal 3-carbamates have been the most challenging substrates; formation of their amidoglycosylation products is most effective with an electron-withdrawing 6 O-Ts substituent and a sterically demanding 4 O-TBS group. These results suggest a mechanism whereby conformational and electronic factors determine the partitioning of an intermediate acyl nitrenoid between alkene addition, leading to amidoglycosylation, and C3-H insertion, providing the dihydropyranone byproduct. Along the amidoglycosylation pathway, high anomeric selectivity results when a glycosyl aziridine intermediate is favored over an aziridine-opened oxocarbenium donor.
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Affiliation(s)
- Simran Buttar
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Julia Caine
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Evelyne Goné
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Reneé Harris
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Jennifer Gillman
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Roxanne Atienza
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Ritu Gupta
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Kimberly M. Sogi
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Lauren Jain
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Nadia C. Abascal
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Yetta Levine
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Lindsay M. Repka
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
| | - Christian M. Rojas
- Department of Chemistry, Barnard College, 3009 Broadway, New York, New York 10027, United States
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91
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Li H, Cheng Z, Tung CH, Xu Z. Atom Transfer Radical Addition to Alkynes and Enynes: A Versatile Gold/Photoredox Approach to Thio-Functionalized Vinylsulfones. ACS Catal 2018. [DOI: 10.1021/acscatal.8b02194] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Haoyu Li
- Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, China
| | - Zengrui Cheng
- Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, China
| | - Chen-Ho Tung
- Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, China
| | - Zhenghu Xu
- Shandong University, No. 27 Shanda South Road, Jinan, Shandong 250100, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China
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92
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Liu TS, Zhou H, Chen P, Huang XR, Bao LQ, Zhuang CL, Xu QS, Shen MH, Xu HD. Intramolecular Imino-ene Reaction of 2H-azirines with Alkenes: Rapid Construction of Spiro NH Aziridines from Vinyl Azides. Org Lett 2018; 20:3156-3160. [DOI: 10.1021/acs.orglett.8b00821] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Tai-Shang Liu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Hao Zhou
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Peng Chen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Xiu-Rong Huang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Lin-Qing Bao
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Chen-Lu Zhuang
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Qing-Song Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Mei-Hua Shen
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
| | - Hua-Dong Xu
- Jiangsu Key Laboratory of Advanced Catalytic Materials & Technology, School of Pharmaceutical Engineering & Life Science, Changzhou University, Changzhou 213164, People’s Republic of China
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93
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Thomas KE, McCormick LJ, Carrié D, Vazquez-Lima H, Simonneaux G, Ghosh A. Halterman Corroles and Their Use as a Probe of the Conformational Dynamics of the Inherently Chiral Copper Corrole Chromophore. Inorg Chem 2018; 57:4270-4276. [PMID: 29608308 DOI: 10.1021/acs.inorgchem.7b02767] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Halterman corroles have been synthesized for the first time from pyrrole and Halterman's aldehyde via Gryko's "water-methanol method". These were derivatized to the corresponding copper complexes and subsequently to the β-octabromo complexes. Electronic circular dichroism spectra were recorded for the enantiopure copper complexes, affording the first such measurements for the inherently chiral Cu corrole chromophore. Interestingly, for a given configuration of the Halterman substituents, X-ray crystallographic studies revealed both P and M conformations of the Cu-corrole core, proving that the substituents, even in conjunction with β-octabromination, are unable to lock the Cu-corrole core into a given chirality. The overall body of evidence strongly indicates a dynamic equilibrium between the P and M conformations. Such an interconversion, which presumably proceeds via saddling inversion, provides a rationale for our failure so far to resolve sterically hindered Cu corroles into their constituent enantiomers by means of chiral HPLC.
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Affiliation(s)
- Kolle E Thomas
- Department of Chemistry , UiT - The Arctic University of Norway , N-9037 Tromsø , Norway
| | - Laura J McCormick
- Advanced Light Source , Lawrence Berkeley National Laboratory , Berkeley , California 94720-8229 , United States
| | - Daniel Carrié
- Institut des Sciences Chimiques de Rennes, UMR 6226 , Université de Rennes 1 , Campus de Beaulieu , 35042 Rennes , France
| | - Hugo Vazquez-Lima
- Department of Chemistry , UiT - The Arctic University of Norway , N-9037 Tromsø , Norway
| | - Gérard Simonneaux
- Institut des Sciences Chimiques de Rennes, UMR 6226 , Université de Rennes 1 , Campus de Beaulieu , 35042 Rennes , France
| | - Abhik Ghosh
- Department of Chemistry , UiT - The Arctic University of Norway , N-9037 Tromsø , Norway
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94
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95
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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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96
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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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97
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Chiappini ND, Mack JBC, Du Bois J. Intermolecular C(sp
3
)−H Amination of Complex Molecules. Angew Chem Int Ed Engl 2018; 57:4956-4959. [DOI: 10.1002/anie.201713225] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 11/08/2022]
Affiliation(s)
| | - James B. C. Mack
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | - J. Du Bois
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
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98
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Chiappini ND, Mack JBC, Du Bois J. Intermolecular C(sp
3
)−H Amination of Complex Molecules. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201713225] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
| | - James B. C. Mack
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
| | - J. Du Bois
- Department of Chemistry Stanford University Stanford CA 94305-5080 USA
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99
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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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100
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Hao W, Harenberg JH, Wu X, MacMillan SN, Lin S. Diastereo- and Enantioselective Formal [3 + 2] Cycloaddition of Cyclopropyl Ketones and Alkenes via Ti-Catalyzed Radical Redox Relay. J Am Chem Soc 2018; 140:3514-3517. [DOI: 10.1021/jacs.7b13710] [Citation(s) in RCA: 79] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Wei Hao
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Johannes H. Harenberg
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Department Chemie, Ludwig-Maximilians-Universität München, Munich, 81377, Germany
| | - Xiangyu Wu
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Samantha N. MacMillan
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
| | - Song Lin
- Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853, United States
- Atkinson Center for a Sustainable Future, Cornell University, Ithaca, New York 14853, United States
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