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Rudolf R, Batman D, Mehner N, Walter RRM, Sarkar B. Redox-Active Triazole-Derived Mesoionic Imines with Ferrocenyl Substituents and their Metal Complexes: Directed Hydrogen-Bonding, Unusual C-H Activation and Ion-Pair Formation. Chemistry 2024; 30:e202400730. [PMID: 38634285 DOI: 10.1002/chem.202400730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Revised: 04/17/2024] [Accepted: 04/17/2024] [Indexed: 04/19/2024]
Abstract
We present herein the synthesis, characterization and complexation of ferrocenyl-substituted MIIs (mesoionic imines) and their metal complexes. In the free MIIs, strong hydrogen bonding interactions are observed between the imine-N and the C-H bonds of the ferrocenyl substituents both in the solid state and in solution. The influence of this hydrogen bonding is so strong that complexation of the MIIs with [IrCp*Cl2]2 yields unique six-membered iridacycles via C-H-activation of the corresponding C-H-site at the Fc-substituent and not the Ph-substituent. This result is in contrast to previous reports in which always a preferential C-H activation at the phenyl substituent is observed in competitive reactions in the presence of ferrocenyl substituents. The corresponding Ir complexes formed after in-situ halide exchange reaction exist in either [Ir-I] contact or as [Ir]+I- solvent separated ion-pairs depending on the solvent polarity. The iodide coordinated and solvent separated ion-pairs display drastically different physical properties. The TEP (Tolman-electronic-parameter) of these ligands was determined and lines up with previously reported MII-ligands. The redox properties were investigated by a combination of electrochemical and spectroelectrochemical methods. We show here how non-covalent interactions can have a drastic influence on the physical and chemical properties of these new class of compounds.
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Affiliation(s)
- Richard Rudolf
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart
| | - Derman Batman
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart
| | - Niklas Mehner
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart
| | - Robert R M Walter
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart
| | - Biprajit Sarkar
- Universität Stuttgart, Institut für Anorganische Chemie, Pfaffenwaldring 55, 70569, Stuttgart
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2
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Liu J, Tang J, Chen J, Ge T, Zhao X, Xu J, Gong P, Hou Y. Stereoselective Synthesis of Substituted ( Z)- N-Allyl Sulfonamides via a Palladium-Catalyzed Three-Component Tandem Reaction. J Org Chem 2023; 88:4162-4171. [PMID: 36971317 DOI: 10.1021/acs.joc.2c02661] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
Abstract
This paper reports the efficient synthesis of substituted (Z)-N-allyl sulfonamides via a palladium-catalyzed three-component tandem reaction of N-buta-2,3-dienyl sulfonamides with iodides and sulfonyl hydrazide or sulfinic acid sodium salt as nucleophiles. Pd(PPh3)4 (2.5 mol %), K2CO3, and THF were used as the optimal catalyst, base, and solvent, respectively. The substituted (Z)-N-allyl sulfonamides were obtained in a 30-83% overall yield. Mechanistic investigations revealed that the formation of the single (Z)-isomer was controlled by the formation of a six-membered palladacycle intermediate.
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3
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Yu X, Hu L, Frey W, Lu G, Peters R. Stereoretentive Regio- and Enantioselective Allylation of Isoxazolinones by a Planar Chiral Palladacycle Catalyst. Angew Chem Int Ed Engl 2022; 61:e202210145. [PMID: 35900908 PMCID: PMC9804762 DOI: 10.1002/anie.202210145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Indexed: 01/09/2023]
Abstract
The catalytic allylic substitution is one of the most important tools in asymmetric synthesis to form C-C bonds in an enantioselective way. While high efficiency was previously accomplished in terms of enantio- and regiocontrol using different catalyst types, a strong general limitation is a very pronounced preference for the formation of allylic substitution products with (E)-configured C=C double bonds. Herein, we report that with a planar chiral palladacycle catalyst a diastereospecific reaction outcome is achieved using isoxazolinones and allylic imidates as substrates, thus maintaining the C=C double bond geometry of the allylic substrates in the highly enantioenriched products. DFT calculations show that the reactions proceed via an SN 2 mechanism and not via π-allyl Pd complexes. Crucial for the high control is the stabilization of the allylic fragment in the SN 2 transition state by π-interactions with the phenyl substituents of the pentaphenylferrocenyl catalyst core.
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Affiliation(s)
- Xin Yu
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany,ZJU-Hangzhou Global Scientific and Technological Innovation CenterHangzhouZhejiang 311200China
| | - Lingfei Hu
- Shandong UniversitySchool of Chemistry and Chemical EngineeringKey Laboratory of Colloid and Interface ChemistryMinistry of EducationJinanShandong 250100China
| | - Wolfgang Frey
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
| | - Gang Lu
- Shandong UniversitySchool of Chemistry and Chemical EngineeringKey Laboratory of Colloid and Interface ChemistryMinistry of EducationJinanShandong 250100China
| | - René Peters
- Universität StuttgartInstitut für Organische ChemiePfaffenwaldring 5570569StuttgartGermany
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4
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Pfeffer C, Probst P, Wannenmacher N, Frey W, Peters R. Direct Enantioselective Addition of Alkynes to Imines by a Highly Efficient Palladacycle Catalyst. Angew Chem Int Ed Engl 2022; 61:e202206835. [PMID: 35701311 PMCID: PMC9545068 DOI: 10.1002/anie.202206835] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2022] [Indexed: 11/12/2022]
Abstract
Enantiopure propargylic amines are highly valuable synthetic building blocks. Much effort has been devoted to develop methods for their preparation. The arguably most important strategy is the 1,2‐addition of alkynes to imines. Despite remarkable progress, the known methods using Zn and Cu catalysts suffer from the need for high catalyst loadings, typically ranging from 2–60 mol % for neutral aldimine substrates. Here we report a planar chiral Pd complex acting as very efficient catalyst for direct asymmetric alkyne additions to imines, requiring very low catalyst loadings. Turnover numbers of up to 8700 were accomplished. Our investigation suggests that a Pd‐acetylide complex is generated as a catalytically relevant intermediate by the aid of an acac ligand acting as internal catalytic base. It is shown that the catalyst is quite stable under the reaction conditions and that product inhibition is not an issue. A total of 39 examples is shown which all yielded almost enantiopure products.
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Affiliation(s)
- Camilla Pfeffer
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Patrick Probst
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Nick Wannenmacher
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 70569 Stuttgart Germany
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5
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Yu X, Hu L, Frey W, Lu G, Peters R. Stereoretentive Regio‐ and Enantioselective Allylation of Isoxazolinones by a Planar Chiral Palladacycle Catalyst. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202210145] [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)
- Xin Yu
- University of Stuttgart: Universitat Stuttgart Institut für Organische Chemie GERMANY
| | - Lingfei Hu
- Shandong University School of Chemistry and Chemical Engineering CHINA
| | - Wolfgang Frey
- University of Stuttgart: Universitat Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart GERMANY
| | - Gang Lu
- Shandong University School of Chemistry and Chemical Engineering CHINA
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55Raum 06.301 70569 Stuttgart GERMANY
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6
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Pfeffer C, Probst P, Wannenmacher N, Frey W, Peters R. Direct Enantioselective Addition of Alkynes to Imines by a Highly Efficient Palladacycle Catalyst. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202206835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Camilla Pfeffer
- Universität Stuttgart: Universitat Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart GERMANY
| | - Patrick Probst
- Universität Stuttgart: Universitat Stuttgart Institut für Organische Chemie GERMANY
| | - Nick Wannenmacher
- Universität Stuttgart: Universitat Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart GERMANY
| | - Wolfgang Frey
- Universität Stuttgart: Universitat Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart GERMANY
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55Raum 06.301 70569 Stuttgart GERMANY
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7
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Wannenmacher N, Heberle M, Yu X, Demircan A, Wanner DM, Pfeffer C, Peters R. Diastereospecific Enantiodivergent Allylation of Pyrazolones as an Entry to β‐Aminoamides. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200185] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Affiliation(s)
- Nick Wannenmacher
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Martin Heberle
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Xin Yu
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Aysegül Demircan
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Daniel M. Wanner
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - Camilla Pfeffer
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55 D-70569 Stuttgart Germany
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8
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Heberle M, Legendre S, Wannenmacher N, Weber M, Frey W, Peters R. Bispalladacycle Catalyzed Nucleophilic Enantioselective Allylation of Aldehydes by Allylstannanes. ChemCatChem 2022. [DOI: 10.1002/cctc.202200093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Martin Heberle
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - Sarah Legendre
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - Nick Wannenmacher
- University of Stuttgart: Universitat Stuttgart Chemistry Pfaffenwaldring 55 D-70569 Stuttgart GERMANY
| | - Manuel Weber
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - Wolfgang Frey
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55Raum 06.301 70569 Stuttgart GERMANY
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9
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Wannenmacher N, Keim N, Frey W, Peters R. Catalytic Asymmetric Chlorination of Isoxazolinones. European J Org Chem 2022. [DOI: 10.1002/ejoc.202200030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
| | - Noah Keim
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - Wolfgang Frey
- University of Stuttgart: Universitat Stuttgart Chemistry GERMANY
| | - René Peters
- Universität Stuttgart Institut für Organische Chemie Pfaffenwaldring 55Raum 06.301 70569 Stuttgart GERMANY
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10
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Broggini G, Loro C, Oble J, Foschi F, Papis M, Beccalli EM, Giofrè S, Poli G. Acid-Mediated Decarboxylative C–H Coupling between Arenes and O-Allyl Carbamates. Org Chem Front 2022. [DOI: 10.1039/d2qo00114d] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Treatment of O-allyl N-tosyl carbamates with aromatic compounds in the presence of Cu(OTf)2 or TMSOTf as promoters, affords N-substituted 1-arylpropan-2-amines, 1,2-diarylpropanes, 1,1-diarylpropanes, or indanes, depending on the nature of the...
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11
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Dai L, Xu D, Mao Y, Zhu J, Yang M. Structures and Synthetic Strategies of Chiral Oxazolinyl Ferrocene Derivatives. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202201037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Wannenmacher N, Pfeffer C, Frey W, Peters R. Enantioenriched γ-Aminoalcohols, β-Amino Acids, β-Lactams, and Azetidines Featuring Tetrasubstituted Fluorinated Stereocenters via Palladacycle-Catalyzed Asymmetric Fluorination of Isoxazolinones. J Org Chem 2021; 87:670-682. [PMID: 34890190 DOI: 10.1021/acs.joc.1c02640] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Enantiopure fluorine containing β-amino acids are of large biological and pharmaceutical interest. Strategies to prepare β-amino acid derivatives possessing a F-containing tetrasubstituted stereocenter at the α-C atom in a catalytic asymmetric sense are rare, in particular using an enantioselective electrophilic C-F bond formation. In the present study, a highly enantioselective palladacycle-catalyzed fluorination of isoxazolinones was developed. It is demonstrated that isoxazolinones are useful precursors toward enantiopure β-amino acid derivatives by diastereo- and chemoselective reduction. The formed γ-aminoalcohols served as valuable precursors toward β-amino acids, β-amino acid esters, and β-lactams, all featuring tetrasubstituted fluorinated stereocenters. In addition, by this work, enantioenriched fluorinated azetidines were accessible for the first time.
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Affiliation(s)
- Nick Wannenmacher
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Camilla Pfeffer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
| | - René Peters
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569 Stuttgart, Germany
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13
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Papa Spadafora B, Moreira Ribeiro FW, Matsushima JE, Ariga EM, Omari I, Soares PMA, de Oliveira-Silva D, Vinhato E, McIndoe JS, Carita Correra T, Rodrigues A. Regio- and diastereoselective Pd-catalyzed aminochlorocyclization of allylic carbamates: scope, derivatization, and mechanism. Org Biomol Chem 2021; 19:5595-5606. [PMID: 34096563 DOI: 10.1039/d1ob00670c] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The regio- and diastereoselective synthesis of oxazolidinones via a Pd-catalyzed vicinal C-N/C-Cl bond-forming reaction from internal alkenes of allylic carbamates is reported. The oxazolidinones are obtained in yields of 44 to 95% with high to excellent diastereoselectivities (from 6 : 1 to >20 : 1 dr) from readily available precursors. This process is scalable, and the products are suitable for the synthesis of useful amino alcohols. A detailed theoretical and experimental mechanistic study was carried out to describe that the reaction proceeds through an anti-aminopalladation of the alkene followed by an oxidative C-Pd(ii) cleavage with retention of the carbon stereochemistry to yield the major diastereomer. The role of Cu(ii) in a C-Cl bond-forming mechanism step has also been proposed.
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Affiliation(s)
- Bruna Papa Spadafora
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - Francisco Wanderson Moreira Ribeiro
- Department of Fundamental Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, Sao Paulo, SP, Brazil and Department of Chemistry, University of Victoria, P. O. Box 3065, Victoria, BC V8W 3V6, Canada
| | - Jullyane Emi Matsushima
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - Elaine Miho Ariga
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - Isaac Omari
- Department of Chemistry, University of Victoria, P. O. Box 3065, Victoria, BC V8W 3V6, Canada
| | - Priscila Machado Arruda Soares
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - Diogo de Oliveira-Silva
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - Elisângela Vinhato
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
| | - J Scott McIndoe
- Department of Chemistry, University of Victoria, P. O. Box 3065, Victoria, BC V8W 3V6, Canada
| | - Thiago Carita Correra
- Department of Fundamental Chemistry, Institute of Chemistry, University of Sao Paulo, Av. Prof. Lineu Prestes, 748, 05508-000, Sao Paulo, SP, Brazil
| | - Alessandro Rodrigues
- Department of Chemistry, Federal University of Sao Paulo, UNIFESP. Prof. Artur Riedel Street 275, lab 10, 09972-270, Diadema, SP, Brazil.
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14
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Connon R, Roche B, Rokade BV, Guiry PJ. Further Developments and Applications of Oxazoline-Containing Ligands in Asymmetric Catalysis. Chem Rev 2021; 121:6373-6521. [PMID: 34019404 PMCID: PMC8277118 DOI: 10.1021/acs.chemrev.0c00844] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Indexed: 12/27/2022]
Abstract
The chiral oxazoline motif is present in many ligands that have been extensively applied in a series of important metal-catalyzed enantioselective reactions. This Review aims to provide a comprehensive overview of the most significant applications of oxazoline-containing ligands reported in the literature starting from 2009 until the end of 2018. The ligands are classified not by the reaction to which their metal complexes have been applied but by the nature of the denticity, chirality, and donor atoms involved. As a result, the continued development of ligand architectural design from mono(oxazolines), to bis(oxazolines), to tris(oxazolines) and tetra(oxazolines) and variations thereof can be more easily monitored by the reader. In addition, the key transition states of selected asymmetric transformations will be given to illustrate the features that give rise to high levels of asymmetric induction. As a further aid to the reader, we summarize the majority of schemes with representative examples that highlight the variation in % yields and % ees for carefully selected substrates. This Review should be of particular interest to the experts in the field but also serve as a useful starting point to new researchers in this area. It is hoped that this Review will stimulate both the development/design of new ligands and their applications in novel metal-catalyzed asymmetric transformations.
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Affiliation(s)
- Robert Connon
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Brendan Roche
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
| | - Balaji V. Rokade
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
| | - Patrick J. Guiry
- Synthesis
and Solid State Pharmaceutical Centre, Centre for Synthesis and Chemical
Biology, School of Chemistry, University
College Dublin, Dublin
4, Ireland
- BiOrbic
Research Centre, Centre for Synthesis and Chemical Biology, School
of Chemistry, University College Dublin, Dublin 4, Ireland
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15
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Au-promoted Pd-catalyzed arylative cyclization of N,N-dimethyl-o-alkynylaniline with aryl iodides: Access to 2,3-diaryl indoles and mechanistic insight. Tetrahedron Lett 2021. [DOI: 10.1016/j.tetlet.2020.152766] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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16
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Deng XJ, Liu HX, Zhang LW, Zhang GY, Yu ZX, He W. Iodoarene-Catalyzed Oxyamination of Unactivated Alkenes to Synthesize 5-Imino-2-Tetrahydrofuranyl Methanamine Derivatives. J Org Chem 2020; 86:235-253. [PMID: 33336571 DOI: 10.1021/acs.joc.0c02047] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Reported here is the room-temperature metal-free iodoarene-catalyzed oxyamination of unactivated alkenes. In this process, the alkenes are difunctionalized by the oxygen atom of the amide group and the nitrogen in an exogenous HNTs2 molecule. This mild and open-air reaction provided an efficient synthesis to N-bistosyl-substituted 5-imino-2-tetrahydrofuranyl methanamine derivatives, which are important motifs in drug development and biological studies. Mechanistic study based on experiments and density functional theory calculations showed that this transformation proceeds via activation of the substrate alkene by an in situ generated cationic iodonium(III) intermediate, which is subsequently attacked by an oxygen atom (instead of nitrogen) of amides to form a five-membered ring intermediate. Finally, this intermediate undergoes an SN2 reaction by NTs2 as the nucleophile to give the oxygen and nitrogen difunctionalized 5-imino-2-tetrahydrofuranyl methanamine product. An asymmetric variant of the present alkene oxyamination using chiral iodoarenes as catalysts also gave promising results for some of the substrates.
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Affiliation(s)
- Xiao-Jun Deng
- Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Hui-Xia Liu
- Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Lu-Wen Zhang
- Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
| | - Guan-Yu Zhang
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Zhi-Xiang Yu
- Beijing National Laboratory for Molecular Sciences (BNLMS), Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education, College of Chemistry, Peking University, Beijing 100871, China
| | - Wei He
- Department of Chemistry, School of Pharmacy, Fourth Military Medical University, Xi'an 710032, China
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17
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Stereospezifische asymmetrische Synthese tertiärer Allylalkohol‐ Derivate über katalytische [2,3]‐Meisenheimer‐Umlagerungen. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202001725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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18
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Yu X, Wannenmacher N, Peters R. Stereospecific Asymmetric Synthesis of Tertiary Allylic Alcohol Derivatives by Catalytic [2,3]-Meisenheimer Rearrangements. Angew Chem Int Ed Engl 2020; 59:10944-10948. [PMID: 32176404 PMCID: PMC7318343 DOI: 10.1002/anie.202001725] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/09/2020] [Indexed: 11/11/2022]
Abstract
Chiral acyclic tertiary allylic alcohols are very important synthetic building blocks, but their enantioselective synthesis is often challenging. A major limitation in catalytic asymmetric 1,2-addition approaches to ketones is the enantioface differentiation by steric distinction of both ketone residues. Herein we report the development of a catalytic asymmetric Meisenheimer rearrangement to overcome this problem, as it proceeds in a stereospecific manner. This allows for high enantioselectivity also for the formation of products in which the residues at the generated tetrasubstituted stereocenter display a similar steric demand. Low catalyst loadings were found to be sufficient and the reaction conditions were mild enough to tolerate even highly reactive functional groups, such as an enolizable aldehyde, a primary tosylate, or an epoxide. Our investigations suggest an intramolecular rearrangement pathway.
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Affiliation(s)
- Xin Yu
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Nick Wannenmacher
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - René Peters
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569, Stuttgart, Germany
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19
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Soeta T, Ukaji Y. Development of Multi-functional NHC Catalysts bearing Pyridine Moiety: Application to Catalytic Asymmetric Reactions. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Takahiro Soeta
- Division of Material Chemistry, Graduate School of Natural Science and Technology
| | - Yutaka Ukaji
- Division of Material Chemistry, Graduate School of Natural Science and Technology
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20
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Agirre M, Henrion S, Rivilla I, Miranda JI, Cossío FP, Carboni B, Villalgordo JM, Carreaux F. 1,3-Dioxa-[3,3]-sigmatropic Oxo-Rearrangement of Substituted Allylic Carbamates: Scope and Mechanistic Studies. J Org Chem 2018; 83:14861-14881. [PMID: 30457341 DOI: 10.1021/acs.joc.8b01320] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
An unexpected 1,3-dioxa-[3,3]-sigmatropic rearrangement during the treatment of aryl- and alkenyl-substituted allylic alcohols with activated isocyanates is reported. The reorganization of bonds is highly dependent on the electron density of the aromatic ring and the nature of isocyanate used. This metal-free tandem reaction from branched allyl alcohols initiated by a carbamoylation reaction and followed by a sigmatropic rearrangement thus offers a new access to ( E)-cinnamyl and conjugated ( E, E)-diene carbamates, such as N-acyl and N-sulfonyl derivatives. A computational study was conducted in order to rationalize this phenomenon, and a rearrangement progress kinetic analysis was performed.
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Affiliation(s)
- Maddalen Agirre
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - Sylvain Henrion
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
| | - Ivan Rivilla
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - José I Miranda
- SGIker NMR Facility , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) , Avda. Tolosa 72 , E-20018 San Sebastián/Donostia , Spain
| | - Fernando P Cossío
- Departamento de Química Orgánica I and Centro de Innovación en Química Avanzada (ORFEO-CINQA), Facultad de Química , Universidad del País Vasco/Euskal Herriko Unibertsitatea (UPV/EHU) and Donostia International Physics Center (DIPC) , P° Manuel Lardizabal 3 , 20018 San Sebastián/Donostia , Spain
| | - Bertrand Carboni
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
| | - José M Villalgordo
- VillaPharma Research, Parque Tecnológico de Fuente Alamo , Ctra. El Estrecho-Lobosillo, Av. Azul , 30320 Murcia , Spain
| | - François Carreaux
- Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes)-UMR 6226 , 263, avenue du Général Leclerc, Campus de Beaulieu , F-35000 Rennes , France
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21
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Dočekal V, Šimek M, Dračínský M, Veselý J. Decarboxylative Organocatalytic Allylic Amination of Morita-Baylis-Hillman Carbamates. Chemistry 2018; 24:13441-13445. [DOI: 10.1002/chem.201803677] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Indexed: 01/03/2023]
Affiliation(s)
- Vojtěch Dočekal
- Department of Organic Chemistry; Charles University; Hlavova 8 12843 Prague Czech Republic
| | - Michal Šimek
- Department of Organic Chemistry; Charles University; Hlavova 8 12843 Prague Czech Republic
| | - Martin Dračínský
- Institute of Organic Chemistry and Biochemistry; Czech Academy of Sciences; Flemingovo nám. 2 16610 Prague Czech Republic
| | - Jan Veselý
- Department of Organic Chemistry; Charles University; Hlavova 8 12843 Prague Czech Republic
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22
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Zhou Y, Lin L, Liu X, Hu X, Lu Y, Zhang X, Feng X. Catalytic Asymmetric Diels-Alder Reaction/[3,3] Sigmatropic Rearrangement Cascade of 1-Thiocyanatobutadienes. Angew Chem Int Ed Engl 2018; 57:9113-9116. [DOI: 10.1002/anie.201804811] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Revised: 05/14/2018] [Indexed: 11/10/2022]
Affiliation(s)
- Yuhang Zhou
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xinyue Hu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Yan Lu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiying Zhang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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23
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Zhou Y, Lin L, Liu X, Hu X, Lu Y, Zhang X, Feng X. Catalytic Asymmetric Diels-Alder Reaction/[3,3] Sigmatropic Rearrangement Cascade of 1-Thiocyanatobutadienes. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804811] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Yuhang Zhou
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Lili Lin
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaohua Liu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xinyue Hu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Yan Lu
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiying Zhang
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
| | - Xiaoming Feng
- Key Laboratory of Green Chemistry & Technology; Ministry of Education; College of Chemistry; Sichuan University; Chengdu 610064 China
- Collaborative Innovation Center of Chemical Science and Engineering; Tianjin China
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24
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Holz J, Ayerbe García M, Frey W, Krupp F, Peters R. Diastereoselective synthesis, structure and reactivity studies of ferrocenyloxazoline gold(i) and gold(ii) complexes. Dalton Trans 2018; 47:3880-3905. [PMID: 29451574 DOI: 10.1039/c8dt00109j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In the last few decades, gold complexes have demonstrated huge potential for soft Lewis acid catalysis. Despite the intensive research on Au complexes and planar chiral metallacycles, enantiopure ferrocenylgold complexes have - surprisingly - not been reported until the studies presented in this article. Herein, we report the asymmetric synthesis of planar chiral ferrocenyl Au(i) complexes. These dinuclear species form helically chiral ten-membered (NCCCAu)2 rings stabilized by aurophilic interactions. In supramolecular solid state structures, linear, zigzag or helical Au(i) wires with regular AuAu separations were observed. The dissolved dinuclear entities could be oxidized by Au(i) to unique ferrocenyl Au(ii) complexes featuring short Au(ii)-Au(ii) bonds, while the ferrocene core remained intact. However, our initial studies revealed the issue of configurational lability of the ferrocenyl Au(ii) complexes in terms of the element of planar chirality in the presence of the gold source, (Me2S)AuCl. This was successfully addressed by a systematic study implementing permanent σ-donor ortho-protecting groups such as methyl and trimethylsilyl, which impede an epimerization event. Oxidation of the dinuclear Au(i) complexes was also accomplished by oxidative addition reactions with halogenated solvents, preferably CHCl3. Additional reactivity studies revealed that dinuclear Au(ii) dihalide complexes are also formed with reactive alkylhalides such as iodomethane, benzylbromide and benzyliodide. Interestingly, the whole spectral range of colors (violet, blue, green, yellow, and red) is covered by the title complexes depending on the Au oxidation state and the anionic ligands in the Au(ii) complexes. This appears to be quite unusual for ferrocenes, which typically adopt orange to red colors in a non-oxidized state.
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Affiliation(s)
- Julia Holz
- Universität Stuttgart, Institut für Organische Chemie, Pfaffenwaldring 55, 70569 Stuttgart, Germany.
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25
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Rieckhoff S, Meisner J, Kästner J, Frey W, Peters R. Double Regioselective Asymmetric C-Allylation of Isoxazolinones: Iridium-Catalyzed N-Allylation Followed by an Aza-Cope Rearrangement. Angew Chem Int Ed Engl 2017; 57:1404-1408. [DOI: 10.1002/anie.201710940] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Indexed: 12/22/2022]
Affiliation(s)
- Stefan Rieckhoff
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Jan Meisner
- Universität Stuttgart; Institut für Theoretische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Johannes Kästner
- Universität Stuttgart; Institut für Theoretische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Germany
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26
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Rieckhoff S, Meisner J, Kästner J, Frey W, Peters R. Doppelt regioselektive asymmetrische C-Allylierung von Isoxazolinonen: Iridium-katalysierte N-Allylierung mit nachfolgender Aza-Cope-Umlagerung. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201710940] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Stefan Rieckhoff
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Jan Meisner
- Universität Stuttgart; Institut für Theoretische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Johannes Kästner
- Universität Stuttgart; Institut für Theoretische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - Wolfgang Frey
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
| | - René Peters
- Universität Stuttgart; Institut für Organische Chemie; Pfaffenwaldring 55 70569 Stuttgart Deutschland
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27
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Kondoh A, Kamata Y, Terada M. Synthesis of Enantioenriched γ-Amino-α,β-unsaturated Esters Utilizing Palladium-Catalyzed Rearrangement of Allylic Carbamates for Direct Application to Formal [3 + 2] Cycloaddition. Org Lett 2017; 19:1682-1685. [DOI: 10.1021/acs.orglett.7b00471] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Azusa Kondoh
- Research and Analytical Center for Giant Molecules, Graduate School
of Science and ‡Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Yuji Kamata
- Research and Analytical Center for Giant Molecules, Graduate School
of Science and ‡Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
| | - Masahiro Terada
- Research and Analytical Center for Giant Molecules, Graduate School
of Science and ‡Department of Chemistry, Graduate School of Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan
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28
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Schrapel C, Frey W, Garnier D, Peters R. Highly Enantioselective Ferrocenyl Palladacycle-Acetate Catalysed Arylation of Aldimines and Ketimines with Arylboroxines. Chemistry 2017; 23:2448-2460. [PMID: 27983770 DOI: 10.1002/chem.201605244] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Indexed: 01/02/2023]
Affiliation(s)
- Carmen Schrapel
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Wolfgang Frey
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - Delphine Garnier
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
| | - René Peters
- Institut für Organische Chemie; Universität Stuttgart; Pfaffenwaldring 55 70569 Stuttgart Germany
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29
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Du W, Gu Q, Li Y, Lin Z, Yang D. Enantioselective Palladium-Catalyzed Oxidative Cascade Cyclization of Aliphatic Alkenyl Amides. Org Lett 2017; 19:316-319. [DOI: 10.1021/acs.orglett.6b03410] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Wei Du
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Qiangshuai Gu
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
| | - Yang Li
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Zhenyang Lin
- Department
of Chemistry, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, China
| | - Dan Yang
- Department
of Chemistry, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China
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30
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Vignesh A, Kaminsky W, Dharmaraj N. Expeditious Assembly of Fluorenones through Domino Reactions of Benzoyl Chlorides with Arylboronic Acids Catalyzed by ONO Pincer-like Palladium(II) Complexes. ChemCatChem 2016. [DOI: 10.1002/cctc.201600717] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Arumugam Vignesh
- Inorganic & Nanomaterials Research Laboratory; Department of Chemistry; Bharathiar University; Coimbatore 641 046 India
| | - Werner Kaminsky
- Department of Chemistry; University of Washington; Seattle Washington 98195 USA
| | - Nallasamy Dharmaraj
- Inorganic & Nanomaterials Research Laboratory; Department of Chemistry; Bharathiar University; Coimbatore 641 046 India
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31
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Pellissier H. Recent Developments in Enantioselective Metal-Catalyzed Domino Reactions. Adv Synth Catal 2016. [DOI: 10.1002/adsc.201600462] [Citation(s) in RCA: 78] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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32
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Bauer JM, Frey W, Peters R. Dual Palladium(II)/Tertiary Amine Catalysis for Asymmetric Regioselective Rearrangements of Allylic Carbamates. Chemistry 2016; 22:5767-77. [PMID: 26990446 DOI: 10.1002/chem.201600138] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2016] [Indexed: 11/10/2022]
Abstract
The streamlined catalytic access to enantiopure allylic amines as valuable precursors towards chiral β- and γ-aminoalcohols as well as α- and β-aminoacids is desirable for industrial purposes. In this article an enantioselective method is described that transforms achiral allylic alcohols and N-tosylisocyanate in a single step into highly enantioenriched N-tosyl protected allylic amines via an allylic carbamate intermediate. The latter is likely to undergo a cyclisation-induced [3,3]-rearrangement catalysed by a planar chiral pentaphenylferrocene palladacycle in cooperation with a tertiary amine base. The otherwise often indispensable activation of palladacycle catalysts by a silver salt is not required in the present case and there is also no need for an inert gas atmosphere. To further improve the synthetic value, the rearrangement was used to form dimethylaminosulfonyl-protected allylic amines, which can be deprotected under non-reductive conditions.
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Affiliation(s)
- Johannes Moritz Bauer
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - Wolfgang Frey
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany
| | - René Peters
- Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, 70569, Stuttgart, Germany.
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33
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Weiss M, Holz J, Peters R. Regioselective Asymmetric Allylic Alkylation Reaction ofα-Cyanoacetates Catalyzed by a Heterobimetallic Platina-/Palladacycle. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501290] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Shen MH, Xu K, Sun CH, Xu HD. Stereoselective Construction of Bridged trans-aza-Bicyclo[7/6,3/2,1]alkenyl Imines through Ring Expansion aza-Cope Rearrangement. Org Lett 2015; 17:5598-601. [DOI: 10.1021/acs.orglett.5b02798] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Mei-Hua Shen
- School of Pharmaceutical
Engineering and Life Science, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Ke Xu
- School of Pharmaceutical
Engineering and Life Science, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Chu-Han Sun
- School of Pharmaceutical
Engineering and Life Science, Changzhou University, Changzhou, Jiangsu Province 213164, China
| | - Hua-Dong Xu
- School of Pharmaceutical
Engineering and Life Science, Changzhou University, Changzhou, Jiangsu Province 213164, China
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35
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Schrapel C, Peters R. Palladacyclus-katalysierte, hoch enantioselektive Arylierung von Iminen mit Arylboroxinen ohne Verwendung einer exogenen Base. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201501846] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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36
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Schrapel C, Peters R. Exogenous-Base-Free Palladacycle-Catalyzed Highly Enantioselective Arylation of Imines with Arylboroxines. Angew Chem Int Ed Engl 2015; 54:10289-93. [DOI: 10.1002/anie.201501846] [Citation(s) in RCA: 58] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2015] [Revised: 04/30/2015] [Indexed: 12/18/2022]
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37
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Ayerbe Garcia M, Frey W, Ringenberg MR, Schwilk M, Peters R. Dinuclear planar chiral ferrocenyl gold(i) & gold(ii) complexes. Chem Commun (Camb) 2015; 51:16806-9. [DOI: 10.1039/c5cc07018j] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first scalemic ferrocenyl gold(i) and gold(ii) complexes have been prepared and structurally analysed by X-ray, (spectro)electrochemical and DFT studies.
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Affiliation(s)
| | - Wolfgang Frey
- Universität Stuttgart
- Institut für Organische Chemie
- 70569 Stuttgart
- Germany
| | - Mark R. Ringenberg
- Universität Stuttgart
- Institut für Anorganische Chemie
- 70569 Stuttgart
- Germany
| | - Max Schwilk
- Universität Stuttgart
- Institut für Theoretische Chemie
- 70569 Stuttgart
- Germany
| | - René Peters
- Universität Stuttgart
- Institut für Organische Chemie
- 70569 Stuttgart
- Germany
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38
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Moritz Bauer J, Peters R. Catalytic asymmetric [3,3]-rearrangements of allylic acetimidates. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01749h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The rearrangement of non-halogenated acetimidates in combination with an enzymatic amide hydrolysis is attractive to get almost enantiopure allylic amines.
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Affiliation(s)
- J. Moritz Bauer
- Institut für Organische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - René Peters
- Institut für Organische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
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39
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Hellmuth T, Frey W, Peters R. Regioselective Catalytic Asymmetric C-Alkylation of Isoxazolinones by a Base-Free Palladacycle-Catalyzed Direct 1,4-Addition. Angew Chem Int Ed Engl 2014; 54:2788-91. [DOI: 10.1002/anie.201410933] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Indexed: 12/16/2022]
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40
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Hellmuth T, Frey W, Peters R. Regioselektive katalytische asymmetrische C-Alkylierung von Isoxazolinonen durch basenfreie Palladacyclus-katalysierte direkte 1,4-Addition. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201410933] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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41
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Dickmu GC, Smoliakova IP. Preparation and characterization of cyclopalladated complexes derived from l-(−)-fenchone. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.08.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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42
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Qian H, Yin Z, Zhang T, Yan S, Wang Q, Zhang C. Palladacycle from Cyclometalation of the Unsubstituted Cyclopentadienyl Ring in Ferrocene: Synthesis, Characterization, Theoretical Studies, and Application to Suzuki–Miyaura Reaction. Organometallics 2014. [DOI: 10.1021/om5008924] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Hengyu Qian
- Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
| | - Zhigang Yin
- Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
| | - Tongyan Zhang
- Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
| | - Shihai Yan
- College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109, People’s Republic of China
| | - Quanling Wang
- Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
| | - Chunxia Zhang
- Key Laboratory of Surface & Interface Science of Henan, School of Material & Chemical Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, People’s Republic of China
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