1
|
Shimizu K, Kushima M, Seki M, Yasue R, Yoshida K. Synthesis and Application of Planar Chiral NHC/Rh Complexes Bearing CoC 4Ph 4 Group. J Org Chem 2024; 89:11811-11817. [PMID: 39106485 DOI: 10.1021/acs.joc.4c01347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2024]
Abstract
Sandwich compound-based planar chiral N-heterocyclic carbene (NHC) ligands having a bulky η5-cyclopentadienyl-cobalt-η4-tetraphenylcyclobutadiene core were developed, and their donor strengths were evaluated by determining the Tolman electronic parameter (TEP) of the Rh dicarbonyl complex. The TEP was high at 2048 cm-1, as expected for an NHC ligand. The utility of the carbenes as chiral ligands was examined in the Rh-catalyzed asymmetric ring-opening reaction of oxabenzonorbornadienes with benzylamine, and the corresponding products were obtained with moderate enantioselectivities (up to 66% ee).
Collapse
|
2
|
Guan CY, Zou S, Luo C, Li ZY, Huang M, Huang L, Xiao X, Wei D, Wang MC, Mei GJ. Catalytic asymmetric synthesis of planar-chiral dianthranilides via (Dynamic) kinetic resolution. Nat Commun 2024; 15:4580. [PMID: 38811566 PMCID: PMC11136957 DOI: 10.1038/s41467-024-48947-1] [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: 10/12/2023] [Accepted: 05/20/2024] [Indexed: 05/31/2024] Open
Abstract
Chirality constitutes an inherent attribute of nature. The catalytic asymmetric synthesis of molecules with central, axial, and helical chirality is a topic of intense interest and is becoming a mature field of research. However, due to the difficulty in synthesis and the lack of a prototype, less attention has been given to planar chirality arising from the destruction of symmetry on a single planar ring. Herein, we report the catalytic asymmetric synthesis of planar-chiral dianthranilides, a unique class of tub-shaped eight-membered cyclic dilactams. This protocol is enabled by cinchona alkaloid-catalyzed (dynamic) kinetic resolution. Under mild conditions, various C2- or C1-symmetric planar-chiral dianthranilides have been readily prepared in high yields with excellent enantioselectivity. These dianthranilides can serve as an addition to the family of planar-chiral molecules. Its synthetic value has been demonstrated by kinetic resolution of racemic amines via acyl transfer, enantiodivergent synthesis of the natural product eupolyphagin, and preliminary antitumor activity studies.
Collapse
Affiliation(s)
- Chun-Yan Guan
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Shuai Zou
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Can Luo
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Zhen-Yu Li
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Mingjie Huang
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Lihua Huang
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China.
- Pingyuan Laboratory (Zhengzhou University), Zhengzhou, China.
| | - Xiao Xiao
- Collaborative Innovation Center of Yangtze River Delta Region Green Pharmaceuticals, Zhejiang University of Technology, Hangzhou, China
| | - Donghui Wei
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Min-Can Wang
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China
| | - Guang-Jian Mei
- Henan Key Laboratory of Chemical Biology and Organic Chemistry, College of Chemistry, Zhengzhou University, Zhengzhou, China.
- Pingyuan Laboratory (Zhengzhou University), Zhengzhou, China.
| |
Collapse
|
3
|
Liu CX, Zhao F, Gu Q, You SL. Enantioselective Rh(I)-Catalyzed C-H Arylation of Ferroceneformaldehydes. ACS CENTRAL SCIENCE 2023; 9:2036-2043. [PMID: 38033798 PMCID: PMC10683487 DOI: 10.1021/acscentsci.3c00748] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Indexed: 12/02/2023]
Abstract
As an important class of platform molecules, planar chiral ferrocene carbonyl compounds could be transformed into various functional groups offering facile synthesis of chiral ligands and catalysts. However, developing efficient and straightforward methods for accessing enantiopure planar chiral ferrocene carbonyl compounds, especially ferroceneformaldehydes, remains highly challenging. Herein, we report a rhodium(I)/phosphoramidite-catalyzed enantioselective C-H bond arylation of ferroceneformaldehydes. Readily available aryl halides such as aryl iodides, aryl bromides, and even aryl chlorides are suitable coupling partners in this transformation, leading to a series of planar chiral ferroceneformaldehydes in good yields and excellent enantioselectivity (up to 83% yield and >99% ee). The aldehyde group could be transformed into diverse functional groups smoothly, and enantiopure Ugi's amine and PPFA analogues could be synthesized efficiently. The latter was found to be a highly efficient ligand in Pd-catalyzed asymmetric allylic alkylation reactions. Mechanistic experiments supported the formation of imine intermediates as the key step during the reaction.
Collapse
Affiliation(s)
| | | | - Qing Gu
- New Cornerstone Science Laboratory,
State Key Laboratory of Organometallic Chemistry, Shanghai Institute
of Organic Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| | - Shu-Li You
- New Cornerstone Science Laboratory,
State Key Laboratory of Organometallic Chemistry, Shanghai Institute
of Organic Chemistry, University of Chinese
Academy of Sciences, Chinese Academy of Sciences, 345 Lingling Lu, Shanghai 200032, People’s Republic of China
| |
Collapse
|
4
|
Gupta P, Madhavan S, Kapur M. Synthesis of Ferrocene 1,3-Derivatives by Distal C-H Activation. Angew Chem Int Ed Engl 2023; 62:e202305278. [PMID: 37365783 DOI: 10.1002/anie.202305278] [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: 04/14/2023] [Revised: 06/22/2023] [Accepted: 06/26/2023] [Indexed: 06/28/2023]
Abstract
The third position of cyclopentadienyl ring of a monosubstituted ferrocene has remained as an inaccessible chemical space for direct functionalization. Until recently, functionalizing the C(3)-position while bypassing the predominantly active C(2)-position is the most challenging task. Herein, we report a distal C-H functionalization of monosubstituted ferrocenes using an easily removable directing group with precise site-selectivity, under a PdII / mono-N-protected amino-acid ligand catalytic system. The robust synthetic protocol leads to the synthesis of ferrocene 1,3-derivatives with broad scope in olefins while functionalizing ferrocenyl methylamine in moderate to good yields via a highly strained ferrocene appended 12-membered palladacycle intermediate.
Collapse
Affiliation(s)
- Princi Gupta
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| | - Suchithra Madhavan
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| | - Manmohan Kapur
- Department of Chemistry, Indian Institute of Science Education and Research Bhopal, Bhopal Bypass Road, Bhauri, Bhopal, 462066, MP, India
| |
Collapse
|
5
|
Peluso P, Mamane V. Ferrocene derivatives with planar chirality and their enantioseparation by liquid-phase techniques. Electrophoresis 2023; 44:158-189. [PMID: 35946562 PMCID: PMC10087518 DOI: 10.1002/elps.202200148] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2022] [Revised: 07/25/2022] [Accepted: 07/29/2022] [Indexed: 02/01/2023]
Abstract
In the last decade, planar chiral ferrocenes have attracted a growing interest in several fields, particularly in asymmetric catalysis, medicinal chemistry, chiroptical spectroscopy and electrochemistry. In this frame, the access to pure or enriched enantiomers of planar chiral ferrocenes has become essential, relying on the availability of efficient asymmetric synthesis procedures and enantioseparation methods. Despite this, in enantioseparation science, these metallocenes were not comprehensively explored, and very few systematic analytical studies were reported in this field so far. On the other hand, enantioselective high-performance liquid chromatography has been frequently used by organic and organometallic chemists in order to measure the enantiomeric purity of planar chiral ferrocenes prepared by asymmetric synthesis. On these bases, this review aims to provide the reader with a comprehensive overview on the enantioseparation of planar chiral ferrocenes by discussing liquid-phase enantioseparation methods developed over time, integrating this main topic with the most relevant aspects of ferrocene chemistry. Thus, the main structural features of ferrocenes and the methods to model this class of metallocenes will be briefly summarized. In addition, planar chiral ferrocenes of applicative interest as well as the limits of asymmetric synthesis for the preparation of some classes of planar chiral ferrocenes will also be discussed with the aim to orient analytical scientists towards 'hot topics' and issues which are still open for accessing enantiomers of ferrocenes featured by planar chirality.
Collapse
Affiliation(s)
- Paola Peluso
- Istituto di Chimica Biomolecolare ICB CNR, Sede secondaria di Sassari, Sassari, Italy
| | - Victor Mamane
- Institut de Chimie de Strasbourg, UMR 7177, CNRS-Université de Strasbourg, Strasbourg, France
| |
Collapse
|
6
|
Musaoğlu D, Avcı Özbek H, Demirhan F. Heck coupling reactions of aryl halides catalyzed by saturated ferrocenylmethylimidazolinium salts/palladium. JOURNAL OF THE IRANIAN CHEMICAL SOCIETY 2022. [DOI: 10.1007/s13738-022-02689-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
7
|
Paley RS, Hejna BG, Quevedo RE, Wong AR, Dow NW, Murphy JS, Choi S, Yu M, Rablen PR, Pike RD. N-Oxazolidinoyl Diene Iron(0) Tricarbonyl Complexes: Preparation by Diastereoselective Complexation and Synthetic Applications. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Robert S. Paley
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Benjamin G. Hejna
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Raundi E. Quevedo
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Alice R. Wong
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Nathan W. Dow
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Julia S. Murphy
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Sooyun Choi
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Mason Yu
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Paul R. Rablen
- Department of Chemistry and Biochemistry, Swarthmore College, 500 College Avenue, Swarthmore, Pennsylvania 19081, United States
| | - Robert D. Pike
- Department of Chemistry, William & Mary, P.O. Box 8795, Williamsburg, Virginia 23187, United States
| |
Collapse
|
8
|
Baryshnikova SV, Poddel’sky AI. Heteroligand Metal Complexes with Extended Redox Properties Based on Redox-Active Chelating Ligands of o-Quinone Type and Ferrocene. Molecules 2022; 27:molecules27123928. [PMID: 35745052 PMCID: PMC9230781 DOI: 10.3390/molecules27123928] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 12/10/2022] Open
Abstract
A combination of different types of redox-active systems in one molecule makes it possible to create coordination compounds with extended redox abilities, combining molecular and electronic structures determined by the features of intra- and intermolecular interactions between such redox-active centres. This review summarizes and analyses information from the literature, published mainly from 2000 to the present, on the methods of preparation, the molecular and electronic structure of mixed-ligand coordination compounds based on redox-active ligands of the o-benzoquinone type and ferrocenes, ferrocene-containing ligands, the features of their redox properties, and some chemical behaviour.
Collapse
|
9
|
López R, Palomo C. Planar Chirality: A Mine for Catalysis and Structure Discovery. Angew Chem Int Ed Engl 2022; 61:e202113504. [PMID: 34717037 PMCID: PMC9304569 DOI: 10.1002/anie.202113504] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Revised: 10/29/2021] [Indexed: 11/06/2022]
Abstract
Planar chirality is one of the most fascinating expressions of chirality, which is exploited by nature to lock three-dimensional chiral conformations and, more recently, by chemists to create new chiral reagents, catalysts, and functional organic materials. Nevertheless, the shortage of procedures able to induce and secure asymmetry during the generation of these unique chiral entities has dissuaded chemists from exploiting their structural properties. This Minireview intends to illustrate the limited but remarkable catalytic methods that have been reported for the production of planar chirality in strained molecules and serve as a source of inspiration for the development of new unconventional procedures, which are expected to appear in the near future.
Collapse
Affiliation(s)
- Rosa López
- Department of Organic Chemistry IFaculty of ChemistryUniversity of the Basque Country (UPV/EHU)Manuel de Lardizabal 320018San SebastiánSpain
| | - Claudio Palomo
- Department of Organic Chemistry IFaculty of ChemistryUniversity of the Basque Country (UPV/EHU)Manuel de Lardizabal 320018San SebastiánSpain
| |
Collapse
|
10
|
López R, Palomo C. Planar Chirality: A Mine for Catalysis and Structure Discovery. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202113504] [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)
- Rosa López
- Department of Organic Chemistry I Faculty of Chemistry University of the Basque Country (UPV/EHU) Manuel de Lardizabal 3 20018 San Sebastián Spain
| | - Claudio Palomo
- Department of Organic Chemistry I Faculty of Chemistry University of the Basque Country (UPV/EHU) Manuel de Lardizabal 3 20018 San Sebastián Spain
| |
Collapse
|
11
|
Seki M, Yoshida K. Chiral Bicyclic NHC/Rh Complexes and Their Application to Catalytic Asymmetric Ring-Opening Reaction of Oxabenzonorbornadienes with Amines. J Org Chem 2022; 87:3007-3013. [DOI: 10.1021/acs.joc.1c02836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
12
|
Sakai S, Kanemoto K, Fukuzawa SI. Synthesis and Evaluation of Novel Planar‐Chiral Monophosphine Ligands Bearing Ferrocene‐Triazole Backbones. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202100967] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Suguru Sakai
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
| | - Kazuya Kanemoto
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry Kasuga1-13-27 112-8551 Bunkyo-ku JAPAN
| | - Shin-ichi Fukuzawa
- Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering: Chuo Daigaku Rikogakubu Daigakuin Rikogaku Kenkyuka Department of Applied Chemistry JAPAN
| |
Collapse
|
13
|
Abstract
The discovery of ferrocene, [Fe(η5-C5H5)2], seventy years ago has significantly influenced chemical research and provided a key impetus for establishing and rapidly expanding organometallic chemistry, which has continued at a...
Collapse
|
14
|
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]
|
15
|
Bernardo O, González‐Pelayo S, López LA. Synthesis and Applications of Ferrocene‐Fused Nitrogen Heterocycles. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100911] [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)
- Olaya Bernardo
- Departamento de Química Orgánica e Inorgánica Instituto Universitario de Química Organometálica “Enrique Moles” Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Oviedo Julián Clavería 8 33006- Oviedo Spain
| | - Silvia González‐Pelayo
- Laboratorio de Química Orgánica y Farmacéutica Departamento de Ciencias Farmacéuticas Facultad de Farmacia Universidad de Salamanca Campus Miguel de Unamuno 37007- Salamanca Spain
| | - Luis A. López
- Departamento de Química Orgánica e Inorgánica Instituto Universitario de Química Organometálica “Enrique Moles” Centro de Innovación en Química Avanzada (ORFEO-CINQA) Universidad de Oviedo Julián Clavería 8 33006- Oviedo Spain
| |
Collapse
|
16
|
Guthardt R, Blanckenberg J, Bruhn C, Siemeling U. Planar-chiral 1,1'-diaminoferrocenes. Chem Commun (Camb) 2021; 57:12984-12987. [PMID: 34792053 DOI: 10.1039/d1cc05287j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Planar-chiral homologues of 1,1'-diaminoferrocene, which bear a single additional substituent adjacent to one of the amino groups, are prepared as racemic mixtures in a few steps and in good yields from ferrocene. Various substituents relevant to steric shielding, coordination and further functionalisation are used, giving access to ferrocene-based planar-chiral diimines and diamines as well as stable N-heterocyclic carbenes and tetrylenes by transformations analogous to procedures established for 1,1'-diaminoferrocene.
Collapse
Affiliation(s)
- Robin Guthardt
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Johannes Blanckenberg
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Clemens Bruhn
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| | - Ulrich Siemeling
- Institut für Chemie, Universität Kassel, Heinrich-Plett-Straße 40, 34132 Kassel, Germany.
| |
Collapse
|
17
|
Casper LA, Ebel V, Linseis M, Winter RF. Five shades of green: substituent influence on the (spectro-) electrochemical properties of diferrocenyl(phenyl)methylium dyes. Dalton Trans 2021; 50:15336-15351. [PMID: 34636831 DOI: 10.1039/d1dt03009d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Five new, intensely green diferrocenylphenylmethylium complexes 1+-5+ with electron donating (EDG: 4-MeO, 4-Me, 4-Br) or withdrawing (EWG: 3,5-CF3, 4-nC6F13) substituents were synthesized and fully characterized. The substituent influence on their electrochemical and spectroscopic properties was investigated by cyclic voltammetry, UV/Vis/NIR and T-dependent EPR spectroscopy of the cationic as well as the oxidized (12+-52+) and reduced (1˙-5˙) species. The reduced forms equilibrate with their corresponding dimers (65-83%) with a clear substituent influence as expressed by their Hammett parameters in an ordering 4+ > 5+ > 3+ > 2+ > 1+. The structures of all five precursor carbinols 1-OH-5-OH and those of three of the diferrocenylphenylmethylium cations (1+, 4+-5+) were established by X-ray crystallography.
Collapse
Affiliation(s)
- Larissa A Casper
- Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany.
| | - Viktoria Ebel
- Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany.
| | - Michael Linseis
- Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany.
| | - Rainer F Winter
- Fachbereich Chemie, Universität Konstanz, 78457 Konstanz, Germany.
| |
Collapse
|
18
|
Almássy A, Hejtmánková A, Vargová D, Šebesta R. Isomerization of Ferrocenyl Phosphinites to Phosphane-oxides and retro-Phospha-Brook Rearrangement. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
19
|
Horiuchi S, Moon S, Ito A, Tessarolo J, Sakuda E, Arikawa Y, Clever GH, Umakoshi K. Multinuclear Ag Clusters Sandwiched by Pt Complex Units: Fluxional Behavior and Chiral-at-Cluster Photoluminescence. Angew Chem Int Ed Engl 2021; 60:10654-10660. [PMID: 33617126 DOI: 10.1002/anie.202101460] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Indexed: 11/10/2022]
Abstract
Multinuclear Ag clusters sandwiched by Pt complex units were synthesized and characterized by single crystal X-ray diffraction and NMR studies. The sandwich-shaped multinuclear Ag complexes showed two different types of fluxional behavior in solution: rapid slippage of Pt complex units on the Ag3 core and a reversible demetalation-metalation reaction by the treatment with Cl anion and Ag ion, respectively. The Ag2 complex obtained by demetalation reaction from the Ag3 complex displayed U to Z isomerization. These multinuclear Ag complexes showed strong photoluminescence whose properties depended on the existence of Pt→Ag dative bonds. The Ag3 complex, identified to be "chiral-at-cluster", was optically resolved by the formation of a diastereomeric salt with a chiral anion. The enantiomers show circular dichroism (CD) and circularly polarized luminescence (CPL) properties which is unprecedented for compounds based on a chiral sandwich structure. Theoretical calculations allow to understand their structural features and photophysical properties.
Collapse
Affiliation(s)
- Shinnosuke Horiuchi
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki, 852-8521, Japan.,Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Sangjoon Moon
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Akitaka Ito
- School of Environmental Science and Engineering, Graduate School of Engineering, Kochi University of Technology, 185 Miyanokuchi, Tosayamada, Kami, Kochi, 782-8502, Japan
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Eri Sakuda
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki, 852-8521, Japan.,Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Yasuhiro Arikawa
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Guido H Clever
- Department of Chemistry and Chemical Biology, TU Dortmund University, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science, Graduate School of Engineering, Nagasaki University, 1-14, Bunkyo-machi, Nagasaki, 852-8521, Japan
| |
Collapse
|
20
|
Horiuchi S, Moon S, Ito A, Tessarolo J, Sakuda E, Arikawa Y, Clever GH, Umakoshi K. Multinuclear Ag Clusters Sandwiched by Pt Complex Units: Fluxional Behavior and Chiral‐at‐Cluster Photoluminescence. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202101460] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shinnosuke Horiuchi
- Division of Chemistry and Materials Science Graduate School of Engineering Nagasaki University 1–14, Bunkyo-machi Nagasaki 852-8521 Japan
- Department of Chemistry and Chemical Biology TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
| | - Sangjoon Moon
- Division of Chemistry and Materials Science Graduate School of Engineering Nagasaki University 1–14, Bunkyo-machi Nagasaki 852-8521 Japan
| | - Akitaka Ito
- School of Environmental Science and Engineering Graduate School of Engineering Kochi University of Technology 185 Miyanokuchi Tosayamada, Kami Kochi 782-8502 Japan
| | - Jacopo Tessarolo
- Department of Chemistry and Chemical Biology TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
| | - Eri Sakuda
- Division of Chemistry and Materials Science Graduate School of Engineering Nagasaki University 1–14, Bunkyo-machi Nagasaki 852-8521 Japan
- Department of Chemistry and Chemical Biology TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
| | - Yasuhiro Arikawa
- Division of Chemistry and Materials Science Graduate School of Engineering Nagasaki University 1–14, Bunkyo-machi Nagasaki 852-8521 Japan
| | - Guido H. Clever
- Department of Chemistry and Chemical Biology TU Dortmund University Otto-Hahn-Straße 6 44227 Dortmund Germany
| | - Keisuke Umakoshi
- Division of Chemistry and Materials Science Graduate School of Engineering Nagasaki University 1–14, Bunkyo-machi Nagasaki 852-8521 Japan
| |
Collapse
|
21
|
Nikovskii IA, Spiridonov KA, Pavlov AA, Nelyubina YV, Karnaukh KM, Polezhaev AV. Synthetic Approaches to New Redox-Active Carbene Ligands. RUSS J COORD CHEM+ 2021. [DOI: 10.1134/s1070328421020044] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
22
|
Haraguchi R, Yamazaki T, Torita K, Ito T, Fukuzawa SI. Planar-chiral ferrocene-based triazolylidene copper complexes: synthesis, characterization, and catalysis in asymmetric borylation of α,β-unsaturated ester. Dalton Trans 2020; 49:17578-17583. [PMID: 33231226 DOI: 10.1039/d0dt03213a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
1,2,3-Triazol-5-ylidenes have recently attracted considerable attention as versatile ligands because of their strong electron-donating properties and structural diversities. While some efforts have been devoted to the development of chiral triazolylidene-metal complexes, there is no example achieving asymmetric induction by base-metal complexes with triazolylidene ligands. Herein, we synthesized planar-chiral ferrocene-based triazolylidene copper complexes, which enabled the asymmetric borylation of methyl cinnamate with bis(pinacolato)diboron with good enantioselectivity.
Collapse
Affiliation(s)
- Ryosuke Haraguchi
- Department of Applied Chemistry, Faculty of Engineering, Chiba Institute of Technology, 2-17-1 Tsudanuma, Narashino, Chiba 275-0016, Japan.
| | | | | | | | | |
Collapse
|
23
|
Ye J, Xu Y, Li J, Liu D, Zhang W. The design and synthesis of a novel chiral 1,1′-disubsitituted ruthenocenyl phosphine–oxazoline ligand. RESEARCH ON CHEMICAL INTERMEDIATES 2020. [DOI: 10.1007/s11164-020-04253-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
24
|
Regenauer NI, Jänner S, Wadepohl H, Roşca D. Ein redoxaktives, heterobimetallisches N‐heterocyclisches Carben auf Basis eines Bis(imino)pyrazin‐Liganden. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005865] [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)
- Nicolas I. Regenauer
- Anorganisch-Chemisches Insitut Universität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| | - Sven Jänner
- Anorganisch-Chemisches Insitut Universität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| | - Hubert Wadepohl
- Anorganisch-Chemisches Insitut Universität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| | - Dragoş‐Adrian Roşca
- Anorganisch-Chemisches Insitut Universität Heidelberg Im Neuenheimer Feld 276 69120 Heidelberg Deutschland
| |
Collapse
|
25
|
Regenauer NI, Jänner S, Wadepohl H, Roşca D. A Redox-Active Heterobimetallic N-Heterocyclic Carbene Based on a Bis(imino)pyrazine Ligand Scaffold. Angew Chem Int Ed Engl 2020; 59:19320-19328. [PMID: 32672368 PMCID: PMC7590088 DOI: 10.1002/anie.202005865] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Indexed: 11/11/2022]
Abstract
A new redox-active N-heterocyclic carbene (NHC) architecture is obtained using N-methylated pyrazinediimine iron complexes as precursors. The new species exhibit strong π-accepting/σ-donating properties and are able to ligate two metal centres simultaneously. The redox activity was demonstrated by the reversible chemical oxidation of a heterobimetallic Fe0 /RhI example, which affords an isolable ligand-based radical cation. The reversible redox process was then applied in the catalytic hydrosilylation of 4,4'-difluorobenzophenone, where the reaction rate could be reversibly controlled as a function of the catalyst oxidation state. The new NHC exhibits high electrophilicity and nucleophilicity, which was demonstrated in the reversible activation of alcohols and amines. The electronic structure of the resulting complexes was investigated through various spectroscopic and computational methods.
Collapse
Affiliation(s)
- Nicolas I. Regenauer
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| | - Sven Jänner
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| | - Hubert Wadepohl
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| | - Dragoş‐Adrian Roşca
- Anorganisch-Chemisches InstitutUniversität HeidelbergIm Neuenheimer Feld 27669120HeidelbergGermany
| |
Collapse
|
26
|
Zhai Y, Xu W, Wang D, Zheng P, Zhao X, XU T. A Novel Bisoxazoline-Imidazolium Salt in Ytterbium-Catalyzed Asymmetric Reduction of Ketone. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000816] [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)
- Yujie Zhai
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| | - Wenhao Xu
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| | - Dong Wang
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| | - Purui Zheng
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| | - Xiaoming Zhao
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| | - Tao XU
- Shanghai Key Laboratory of Chemical Assessment and Sustainability; School of Chemical Science and Engineering; Tongji University; 1239 Siping Road 200092 Shanghai P. R. of China
| |
Collapse
|
27
|
Xu D, Zhang J, Dai L. Chiral Oxazolinyl Hydroxyl Ferrocene Catalysts: Synthesis and Applications in Asymmetric Reactions. ChemistrySelect 2020. [DOI: 10.1002/slct.202001874] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Di Xu
- School of Environmental and Municipal Engineering North China University of Water Resources and Electric Power 136 Jinshui East Rd. Zhengzhou Henan Province 450046 P R China
| | - Jun Zhang
- School of Environmental and Municipal Engineering North China University of Water Resources and Electric Power 136 Jinshui East Rd. Zhengzhou Henan Province 450046 P R China
| | - Li Dai
- School of Environmental and Municipal Engineering North China University of Water Resources and Electric Power 136 Jinshui East Rd. Zhengzhou Henan Province 450046 P R China
| |
Collapse
|
28
|
Grecchi S, Arnaboldi S, Korb M, Cirilli R, Araneo S, Guglielmi V, Tomboni G, Magni M, Benincori T, Lang H, Mussini PR. Widening the Scope of “Inherently Chiral” Electrodes: Enantiodiscrimination of Chiral Electroactive Probes with Planar Stereogenicity. ChemElectroChem 2020. [DOI: 10.1002/celc.202000657] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Sara Grecchi
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Serena Arnaboldi
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Marcus Korb
- The University of Western AustraliaFaculty of Sciences, School of Molecular Sciences 35 Stirling Highway, Crawley Perth Western Australia 6009 Australia
| | - Roberto Cirilli
- Centro Nazionale per il Controllo e la Valutazione dei FarmaciIstituto Superiore di Sanità Viale Regina Elena 299 00161 Roma Italy
| | - Silvia Araneo
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Vittoria Guglielmi
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Giorgio Tomboni
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Mirko Magni
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| | - Tiziana Benincori
- Dipartimento di Scienza e Alta TecnologiaUniversità degli Studi dell'Insubria Via Valleggio 11 22100 Como Italy
| | - Heinrich Lang
- Technische Universität ChemnitzFaculty of Natural SciencesInstitute of Chemistry, Inorganic Chemistry Straße der Nationen 62 D-09107 Chemnitz Germany
| | - Patrizia R. Mussini
- Dipartimento di ChimicaUniversità degli Studi di Milano Via Golgi 19 20133 Milan Italy
| |
Collapse
|
29
|
Fitzpatrick KP, Schwamb CB, Check CT, Jang KP, Barsoum DN, Scheidt KA. Development of Ferrocene-Based Planar Chiral Imidazopyridinium Salts for Catalysis. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00312] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Keegan P. Fitzpatrick
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - C. Benjamin Schwamb
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Christopher T. Check
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Ki-Po Jang
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - David N. Barsoum
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| | - Karl A. Scheidt
- Department of Chemistry, Northwestern University, Silverman Hall, Evanston, Illinois 60208, United States
| |
Collapse
|
30
|
Huang J, Luo L, Xing N, Gu L, Li C, Han Q, Zheng S, He L. Novel synthesis of divergent aryl imidazoles from ketones involving copper-catalyzed α-amination and oxidative C-C bond cleavage. RSC Adv 2020; 10:13815-13819. [PMID: 35492973 PMCID: PMC9051655 DOI: 10.1039/d0ra01408g] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 03/16/2020] [Indexed: 11/26/2022] Open
Abstract
A one-pot synthesis, initiated by a copper salt with inorganic (NH4)2CO3 as the nitrogen source, forms divergent aryl imidazole derivatives from ketones via α-amination and oxidative C-C bond cleavage reactions. The approach provides a simple and rapid synthesis of imidazole derivatives and has certain versatility.
Collapse
Affiliation(s)
- Jiangkun Huang
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Lan Luo
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Naiguo Xing
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Linghui Gu
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Chen Li
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Qiao Han
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| | - Shilong Zheng
- Department of Chemistry and RCMI Cancer Research Center, Xavier University of Louisiana New Orleans LA 70125 USA
| | - Ling He
- Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, Department of Medicinal Chemistry, West China School of Pharmacy, Sichuan University Chengdu Sichuan 610041 P. R. China
| |
Collapse
|
31
|
Takagaki W, Yasue R, Yoshida K. Development of Planar Chiral Five-Membered Cyclic (Amino)(ferrocenylene)carbene Ligand and Its Iridium Dicarbonyl Complex. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2020. [DOI: 10.1246/bcsj.20190325] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Waka Takagaki
- Department of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Risa Yasue
- Department of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| | - Kazuhiro Yoshida
- Department of Chemistry, Graduate School of Science, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
- Molecular Chirality Research Center, Chiba University, Yayoi-cho, Inage-ku, Chiba 263-8522, Japan
| |
Collapse
|
32
|
Yoshida K, Yasue R. <i>N</i>-Heterocyclic Carbene Ligands Having Planar Chiral Ferrocene Structure. J SYN ORG CHEM JPN 2020. [DOI: 10.5059/yukigoseikyokaishi.78.28] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Kazuhiro Yoshida
- Department of Chemistry, Graduate School of Science, Chiba University
| | | |
Collapse
|
33
|
Herndon JW. The chemistry of the carbon-transition metal double and triple bond: Annual survey covering the year 2018. Coord Chem Rev 2019. [DOI: 10.1016/j.ccr.2019.213051] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
34
|
Miwa Y, Kamimura T, Sato K, Shishido D, Yoshida K. Chiral Bicyclic NHC/Cu Complexes for Catalytic Asymmetric Borylation of α,β-Unsaturated Esters. J Org Chem 2019; 84:14291-14296. [PMID: 31591888 DOI: 10.1021/acs.joc.9b02096] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The potential of using chiral bicyclic NHC ligands that exhibit modularity was investigated in the Cu-catalyzed asymmetric borylation reaction of α,β-unsaturated esters. After screening for ligands and optimization of the reaction conditions, the corresponding products were afforded with good enantioselectivities (up to 85% ee).
Collapse
|
35
|
Wright AJ, Hughes DL, Bulman Page PC, Stephenson GR. Induction of Planar Chirality Using Asymmetric Click Chemistry by a Novel Desymmetrisation of 1,3-Bisalkynyl Ferrocenes. European J Org Chem 2019. [DOI: 10.1002/ejoc.201901192] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Adam J. Wright
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - David L. Hughes
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - Phillip C. Bulman Page
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| | - G. Richard Stephenson
- School of Chemistry; University of East Anglia; Norwich Research Park NR4 7TJ Norfolk United Kingdom
| |
Collapse
|
36
|
Nikovskiy IA, Spiridonov KA, Zakharova DV, Platonova EO, Pavlov AA, Nelyubina YV, Polezhaev AV. Ortho-lithiation of N-aryl ferrocenylmethanimines. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.118976] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
37
|
Asymmetric syntheses and applications of planar chiral hypervalent iodine(V) reagents with crown ether backbones. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.06.008] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
|
38
|
Transmetalation from Magnesium–NHCs—Convenient Synthesis of Chelating π-Acidic NHC Complexes. INORGANICS 2019. [DOI: 10.3390/inorganics7050065] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The synthesis of chelating N-heterocyclic carbene (NHC) complexes with considerable π-acceptor properties can be a challenging task. This is due to the dimerization of free carbene ligands, the moisture sensitivity of reaction intermediates or reagents, and challenges associated with the workup procedure. Herein, we report a general route using transmetalation from magnesium–NHCs. Notably, this route gives access to transition-metal complexes in quantitative conversion without the formation of byproducts. It therefore produces transition-metal complexes outperforming the conventional routes based on free or lithium-coordinated carbene, silver complexes, or in situ metalation in dimethyl sulfoxide (DMSO). We therefore propose transmetalation from magnesium–NHCs as a convenient and general route to obtain NHC complexes.
Collapse
|
39
|
Yasue R, Yoshida K. Synthesis and Application of Planar Chiral Cyclic (Amino)(ferrocenyl)carbene Ligands Bearing FeCp* Group. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00171] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
40
|
Ibrahim M, Wei MM, Deydier E, Manoury E, Poli R, Lecante P, Philippot K. Rhodium nanoparticles stabilized by ferrocenyl-phosphine ligands: synthesis and catalytic styrene hydrogenation. Dalton Trans 2019; 48:6777-6786. [PMID: 31020979 DOI: 10.1039/c9dt01006h] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
A series of ferrocenylphosphine-stabilized rhodium nanoparticles has been prepared in one pot from the organometallic [Rh(η3-C3H5)3] precursor. This complex has been decomposed by hydrogen treatment (3 bar) in dichloromethane in the presence of five different ferrocene-based phosphine ligands. Very small rhodium nanoparticles in the size range of 1.1-1.7 nm have been obtained. These nanoparticles have shown activity in a model catalytic reaction, namely the hydrogenation of styrene. These results evidence that the metal surface is not blocked despite the steric bulk of the stabilizing ligands. Moreover, certain selectivity has been observed depending on the ligand employed. To the best of our knowledge, such a type of compound has not yet been used for stabilizing metal nanoparticles and our findings highlight the interest to do so.
Collapse
Affiliation(s)
- M Ibrahim
- CNRS, LCC (Laboratoire de Chimie de Coordination), 205, route de Narbonne, BP 44099, F-31077 Toulouse Cedex 4, France.
| | | | | | | | | | | | | |
Collapse
|