51
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Asymmetric Friedel–Crafts alkylation of indoles with 2-nitro-3-arylacrylates catalyzed by a metal-templated hydrogen bonding catalyst. Tetrahedron Lett 2015. [DOI: 10.1016/j.tetlet.2015.06.046] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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52
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Mollin S, Riedel R, Harms K, Meggers E. Octahedral rhodium(III) complexes as kinase inhibitors: Control of the relative stereochemistry with acyclic tridentate ligands. J Inorg Biochem 2015; 148:11-21. [DOI: 10.1016/j.jinorgbio.2015.01.005] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2014] [Revised: 01/13/2015] [Accepted: 01/13/2015] [Indexed: 01/29/2023]
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53
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Yoshida J, Sugawara K, Yuge H, Okabayashi J. Bis(acetylacetonato)bis(pyrazolato)ruthenate(iii) as a redox-active scorpionate ligand. Dalton Trans 2015; 43:16066-73. [PMID: 25238163 DOI: 10.1039/c4dt02331e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The potential of a new anionic octahedral metal complex [Ru(III)(acac)2(pz)2](-) ((-)) (pzH = pyrazole) as a ligand with a scorpionate coordination behaviour like tris(pyrazolyl)borate (tp) and reversible redox activity is presented. Trinuclear metal complexes, [Ru(III)2Zn(II)(acac)4(pz)4] () and [Ru(II)Ru(III)2(acac)4(pz)4] (), were each synthesized by the reaction of ZnCl2 or Ru3(CO)12 with [Ru(III)(acac)2(pz)(pzH)] (H) that is in situ deprotonated and acts as a precursor of (-). Single-crystal X-ray diffraction studies clarified that (-) acts as a scorpionate ligand; two (-) units in and one unit in function as bidentate ligands with two pyrazolates as pincers, while another (-) unit in functions as a tridentate ligand with one oxygen atom as a tail in addition to the two pyrazolate pincers. Moreover, and showed reversible multi-stage redox behaviours based on the Ru(II)/Ru(III) and Ru(III)/Ru(IV) couples of the (-) units in the cyclic voltammetry (CV) measurements. Based on the X-ray, IR, and CV measurements and the comparison with other Ru(ii) complexes with tp derivatives, the (-) unit was found to act as a redox-active scorpionate with electron withdrawing properties compared to the tp.
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Affiliation(s)
- Jun Yoshida
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0329, Japan.
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54
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Shen X, Huo H, Wang C, Zhang B, Harms K, Meggers E. Octahedral Chiral-at-Metal Iridium Catalysts: Versatile Chiral Lewis Acids for Asymmetric Conjugate Additions. Chemistry 2015; 21:9720-6. [PMID: 26033287 DOI: 10.1002/chem.201500922] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2015] [Indexed: 01/10/2023]
Abstract
Octahedral iridium(III) complexes containing two bidentate cyclometalating 5-tert-butyl-2-phenylbenzoxazole (IrO) or 5-tert-butyl-2-phenylbenzothiazole (IrS) ligands in addition to two labile acetonitrile ligands are demonstrated to constitute a highly versatile class of asymmetric Lewis acid catalysts. These complexes feature the metal center as the exclusive source of chirality and serve as effective asymmetric catalysts (0.5-5.0 mol % catalyst loading) for a variety of reactions with α,β-unsaturated carbonyl compounds, namely Friedel-Crafts alkylations (94-99% ee), Michael additions with CH-acidic compounds (81-97% ee), and a variety of cycloadditions (92-99% ee with high d.r.). Mechanistic investigations and crystal structures of an iridium-coordinated substrates and iridium-coordinated products are consistent with a mechanistic picture in which the α,β-unsaturated carbonyl compounds are activated by two-point binding (bidentate coordination) to the chiral Lewis acid.
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Affiliation(s)
- Xiaodong Shen
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Haohua Huo
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Chuanyong Wang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Bo Zhang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany)
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35043 Marburg (Germany). .,College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, (P. R. China).
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55
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Göbel P, Ritterbusch F, Helms M, Bischof M, Harms K, Jung M, Meggers E. Probing Chiral Recognition of Enzyme Active Sites with Octahedral Iridium(III) Propeller Complexes. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201500087] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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56
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Ding X, Lin H, Gong L, Meggers E. Enantioselective Sulfa-Michael Addition to α,β-Unsaturated γ-Oxoesters Catalyzed by a Metal-Templated Chiral Brønsted Base. ASIAN J ORG CHEM 2015. [DOI: 10.1002/ajoc.201500033] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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57
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Li ZZ, Wen AH, Yao SY, Ye BH. Enantioselective Syntheses of Sulfoxides in Octahedral Ruthenium(II) Complexes via a Chiral-at-Metal Strategy. Inorg Chem 2015; 54:2726-33. [DOI: 10.1021/ic502898e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Zheng-Zheng Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - A-Hao Wen
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Su-Yang Yao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
| | - Bao-Hui Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry,
School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, China
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58
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Guillamón EM, Blasco M, Llusar R. Enantioselective synthesis of tungsten trimetallic cluster chalcogenides. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2014.08.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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59
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Hu Y, Zhou Z, Gong L, Meggers E. Asymmetric aza-Henry reaction to provide oxindoles with quaternary carbon stereocenter catalyzed by a metal-templated chiral Brønsted base. Org Chem Front 2015. [DOI: 10.1039/c5qo00132c] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An inert octahedral chiral-at-metal iridium(iii) complex serves as a highly effective chiral Brønsted base catalyst for implementing a quaternary carbon stereocenter.
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Affiliation(s)
- Ying Hu
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Zijun Zhou
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Lei Gong
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
| | - Eric Meggers
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology
- College of Chemistry and Chemical Engineering
- Xiamen University
- Xiamen 361005
- People's Republic of China
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60
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Li Z, Yao S, Ye B. Enantioselective Oxidation of Thioethers to Sulfoxides by Means of a Structural Template with Chiral‐at‐Metal Ruthenium Complexes. Chempluschem 2014. [DOI: 10.1002/cplu.201402243] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Zheng‐Zheng Li
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P. R. China), Fax: (+86) 20 84112245
| | - Su‐Yang Yao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P. R. China), Fax: (+86) 20 84112245
| | - Bao‐Hui Ye
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat‐Sen University, Guangzhou 510275 (P. R. China), Fax: (+86) 20 84112245
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61
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Gong L, Chen LA, Meggers E. Asymmetric catalysis mediated by the ligand sphere of octahedral chiral-at-metal complexes. Angew Chem Int Ed Engl 2014; 53:10868-74. [PMID: 25156957 DOI: 10.1002/anie.201404305] [Citation(s) in RCA: 120] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Indexed: 12/13/2022]
Abstract
Due to the relationship between structure and function in chemistry, access to novel chemical structures ultimately drives the discovery of novel chemical function. In this light, the formidable utility of the octahedral geometry of six-coordinate metal complexes is founded in its stereochemical complexity combined with the ability to access chemical space that might be unavailable for purely organic compounds. In this Minireview we wish to draw attention to inert octahedral chiral-at-metal complexes as an emerging class of metal-templated asymmetric "organocatalysts" which exploit the globular, rigid nature and stereochemical options of octahedral compounds and promise to provide new opportunities in the field of catalysis.
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Affiliation(s)
- Lei Gong
- Key Laboratory for Chemical Biology of Fujian Province and Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005 (P.R. China)
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62
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Gong L, Chen LA, Meggers E. Asymmetrische Katalyse über die Ligandensphäre von oktaedrischen Komplexen mit chiralem Metallzentrum. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404305] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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63
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Breivogel A, Kreitner C, Heinze K. Redox and Photochemistry of Bis(terpyridine)ruthenium(II) Amino Acids and Their Amide Conjugates - from Understanding to Applications. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402466] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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64
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Huo H, Fu C, Wang C, Harms K, Meggers E. Metal-templated enantioselective enamine/H-bonding dual activation catalysis. Chem Commun (Camb) 2014; 50:10409-11. [DOI: 10.1039/c4cc04636f] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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65
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Seo MS, Lee A, Kim H. 2,2′-Dihydroxybenzil: A Stereodynamic Probe for Primary Amines Controlled by Steric Strain. Org Lett 2014; 16:2950-3. [DOI: 10.1021/ol501088v] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Min-Seob Seo
- Department
of Chemistry, KAIST, Daejeon 305-701, Korea
- Center
for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Ansoo Lee
- Department
of Chemistry, KAIST, Daejeon 305-701, Korea
- Center
for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
| | - Hyunwoo Kim
- Department
of Chemistry, KAIST, Daejeon 305-701, Korea
- Center
for Nanomaterials and Chemical Reactions, Institute for Basic Science (IBS), Daejeon 305-701, Korea
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66
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Dong H, Hu H, Liu Y, Zhong J, Zhang G, Zhao F, Sun X, Li Y, Kang Z. Obtaining Chiral Metal–Organic Frameworks via a Prochirality Synthetic Strategy with Achiral Ligands Step-by-Step. Inorg Chem 2014; 53:3434-40. [DOI: 10.1021/ic402867x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Huan Dong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Hailiang Hu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Yang Liu
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Jun Zhong
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Guangju Zhang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Fangfang Zhao
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Xuhui Sun
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Youyong Li
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
| | - Zhenhui Kang
- Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-based Functional Materials and Devices, and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215123, China
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67
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Merten C, McDonald R, Xu Y. Strong Solvent-Dependent Preference of Δ and Λ Stereoisomers of a Tris(diamine)nickel(II) Complex Revealed by Vibrational Circular Dichroism Spectroscopy. Inorg Chem 2014; 53:3177-82. [DOI: 10.1021/ic4031766] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christian Merten
- Department
of Chemistry, University of Alberta, Edmonton T6G2G2, Canada
- Fakultät für Chemie und Biochemie, Ruhr-Universität Bochum, 44801 Bochum, Germany
| | - Robert McDonald
- Department
of Chemistry, University of Alberta, Edmonton T6G2G2, Canada
| | - Yunjie Xu
- Department
of Chemistry, University of Alberta, Edmonton T6G2G2, Canada
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68
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Huo H, Fu C, Harms K, Meggers E. Asymmetric Catalysis with Substitutionally Labile yet Stereochemically Stable Chiral-at-Metal Iridium(III) Complex. J Am Chem Soc 2014; 136:2990-3. [DOI: 10.1021/ja4132505] [Citation(s) in RCA: 143] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Haohua Huo
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Chen Fu
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
- College
of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
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69
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70
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Gong L, Wenzel M, Meggers E. Chiral-auxiliary-mediated asymmetric synthesis of ruthenium polypyridyl complexes. Acc Chem Res 2013; 46:2635-44. [PMID: 23730834 DOI: 10.1021/ar400083u] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An octahedral metal complex with 6 different monodentate ligands can form 15 diastereomers as pairs of enantiomers. As a result, the elaborate stereochemistry of octahedral coordination geometries provides tremendous opportunities in the fields of catalysis, the materials sciences, and the life sciences. The demand for enantiomerically pure coordination complexes for tasks related to the selective molecular recognition of biomacromolecules led us to develop synthetic methods to control the absolute stereochemistry at octahedral metal centers. A few years ago our laboratory therefore embarked on a project exploring new and general synthetic strategies for the asymmetric synthesis of inert octahedral transition metal complexes. We initially used the example of thermally inert ruthenium polypyridyl complexes and developed a family of chiral bidentate ligands, including salicyloxazolines, (mercaptophenyl)oxazolines, sulfinylphenols, N-acetylsulfinamides, a phosphinohydroxybinaphthyl, and even the amino acid proline to serve as chiral auxiliaries for asymmetric coordination chemistry. All these chiral auxiliaries strongly coordinate to ruthenium(II) in a bidentate, deprotonated fashion, allowing them to control the absolute metal-centered configuration in the course of subsequent ligand exchange reactions. Finally, we can remove them from the metal without any loss of chiral information and without leaving a chemical trace. A key feature of these chiral auxiliary ligands is their switchable binding strength. A chelate effect ensures that the chiral ligands coordinate very tightly to the metal center, placing their carbon-based, sulfur-based, or axial chirality in a well-defined position close to the metal center to efficiently establish the absolute metal-centered configuration. At the same time a coordinating phenolate, carboximidate, carboxylate, or thiophenolate moiety makes the coordination reversible by weakening the binding strength through protonation or methylation. Following this strategy, we synthesized a large number of homoleptic, bis-heteroleptic, and tris-heteroleptic ruthenium polypyridyl complexes in an asymmetric fashion with enantiomeric ratios that routinely reached or exceeded 96:4. Our approach should serve as a blueprint for the asymmetric synthesis of different classes of ruthenium complexes and chiral coordination complexes of other metals.
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Affiliation(s)
- Lei Gong
- Fujian Provincial Key Laboratory of Chemical Biology, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
| | - Marianne Wenzel
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Eric Meggers
- Fujian Provincial Key Laboratory of Chemical Biology, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People’s Republic of China
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
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71
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Igashira‐Kamiyama A, Fukushima A, Konno T. Disproportionation of Achiral Nickel(II) Centers into Two Kinds of Chiral Nickel(II) Centers Caused by an Achiral Diimine Ligand. Chemistry 2013; 19:16532-6. [DOI: 10.1002/chem.201303731] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Asako Igashira‐Kamiyama
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560‐0043 (Japan), Fax: (+81) 6‐6850‐5765
| | - Akeha Fukushima
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560‐0043 (Japan), Fax: (+81) 6‐6850‐5765
| | - Takumi Konno
- Department of Chemistry, Graduate School of Science, Osaka University, Toyonaka, Osaka 560‐0043 (Japan), Fax: (+81) 6‐6850‐5765
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72
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Groves BR, Arbuckle DI, Essoun E, Lundrigan TL, Wang R, Aquino MAS. Chiral Induction at Octahedral Ru(II) via the Disassembly of Diruthenium(II,III) Tetracarboxylates Using a Variety of Chiral Diphosphine Ligands. Inorg Chem 2013; 52:11563-72. [DOI: 10.1021/ic401908t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Brandon R. Groves
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
| | - D. Ian Arbuckle
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
| | - Ernest Essoun
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
| | - Travis L. Lundrigan
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
| | - Ruiyao Wang
- Department of Chemistry, Queen’s University, 90 Bader Lane, Kingston, Ontario, K7L 3N6, Canada
| | - Manuel A. S. Aquino
- Department of Chemistry, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia, B2G 2W5, Canada
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73
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Kraack M, Harms K, Meggers E. Reductive Labilization of a Cyclometalating Ligand Applied to Auxiliary-Mediated Asymmetric Coordination Chemistry. Organometallics 2013. [DOI: 10.1021/om4006627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Marianne Kraack
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, People’s Republic of China
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74
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Huang B, Wang L, Gong L, Meggers E. Chiral Enol Oxazolines and Thiazolines as Auxiliary Ligands for the Asymmetric Synthesis of Ruthenium-Polypyridyl Complexes. Chem Asian J 2013; 8:2274-80. [DOI: 10.1002/asia.201300598] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Indexed: 01/28/2023]
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75
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Helms M, Lin Z, Gong L, Harms K, Meggers E. Method for the Preparation of Nonracemic Bis-Cyclometalated Iridium(III) Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300411] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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76
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Sergeeva E, Press K, Goldberg I, Kol M. Zinc Complexes of Bipyrrolidine‐Based Diamine‐Diphenolato and Diamine‐Diolato Ligands: Predetermination of Helical Chirality Around Tetrahedral Centres. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300151] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Ekaterina Sergeeva
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel, Fax: +972‐3‐6409293, http://tau.ac.il/chemistry/kol/
| | - Konstantin Press
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel, Fax: +972‐3‐6409293, http://tau.ac.il/chemistry/kol/
| | - Israel Goldberg
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel, Fax: +972‐3‐6409293, http://tau.ac.il/chemistry/kol/
| | - Moshe Kol
- School of Chemistry, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Ramat Aviv, Tel Aviv 69978, Israel, Fax: +972‐3‐6409293, http://tau.ac.il/chemistry/kol/
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77
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Chen LA, Xu W, Huang B, Ma J, Wang L, Xi J, Harms K, Gong L, Meggers E. Asymmetric catalysis with an inert chiral-at-metal iridium complex. J Am Chem Soc 2013; 135:10598-601. [PMID: 23672419 DOI: 10.1021/ja403777k] [Citation(s) in RCA: 118] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The development of a chiral-at-metal iridium(III) complex for the highly efficient catalytic asymmetric transfer hydrogenation of β,β'-disubstituted nitroalkenes is reported. Catalysis by this inert, rigid metal complex does not involve any direct metal coordination but operates exclusively through weak interactions with functional groups properly arranged in the ligand sphere of the iridium complex. Although the iridium complex relies only on the formation of three hydrogen bonds, it exceeds the performance of most organocatalysts with respect to enantiomeric excess (up to 99% ee) and catalyst loading (down to 0.1 mol %). This work hints at an advantage of structurally complicated rigid scaffolds for non-covalent catalysis, which especially relies on conformationally constrained cooperative interactions between the catalyst and substrates.
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Affiliation(s)
- Liang-An Chen
- Fujian Provincial Key Laboratory of Chemical Biology, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, People's Republic of China
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78
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79
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Werner H. Alfred Werner: A Forerunner to Modern Inorganic Chemistry. Angew Chem Int Ed Engl 2013; 52:6146-53. [DOI: 10.1002/anie.201208389] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Indexed: 11/09/2022]
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80
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Dietrich J, Wünsche von Leupoldt A, Grabolle M, Resch-Genger U, Heinze K. Thermal and Photoinduced Electron Transfer in Directional Bis(terpyridine)ruthenium(II)-(Bipyridine)platinum(II) Complexes. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201201531] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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81
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Jung J, Jo J, Laskar M, Lee D. Stereodynamics of Metal-Ligand Assembly: What Lies Beneath the “Simple” Spectral Signatures ofC2-Symmetric Chiral Chelates. Chemistry 2013; 19:5156-68. [DOI: 10.1002/chem.201204216] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2012] [Indexed: 11/09/2022]
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82
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Seo MS, Kim K, Kim H. Controlling helical chirality of cobalt complexes by chirality transfer from vicinal diamines. Chem Commun (Camb) 2013; 49:11623-5. [DOI: 10.1039/c3cc46887a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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83
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Chen LA, Ding X, Gong L, Meggers E. Thioether-based anchimeric assistance for asymmetric coordination chemistry with ruthenium(ii) and osmium(ii). Dalton Trans 2013; 42:5623-6. [DOI: 10.1039/c3dt00015j] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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84
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Mollin S, Blanck S, Harms K, Meggers E. Cyclometalated phenylquinoline rhodium complexes as protein kinase inhibitors. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2012.04.035] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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85
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Sham KC, Zheng G, Pan Y, Lau KC, Yiu SM, Kwong HL. A ΛΛΛΛ-M4L6 tetrahedral manganese cage: Stereoselective synthesis and captured anion exchange. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.07.046] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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86
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Fu C, Wenzel M, Treutlein E, Harms K, Meggers E. Proline as chiral auxiliary for the economical asymmetric synthesis of ruthenium(II) polypyridyl complexes. Inorg Chem 2012; 51:10004-11. [PMID: 22946499 DOI: 10.1021/ic3015157] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A straightforward method for the synthesis of virtually enantiomerically pure ruthenium(II) polypyridyl complexes [Ru(pp)(pp')(pp")](PF(6))(2), pp = bidentate polypyridyl has been developed. The synthesis draws from the readily available racemic starting material cis-[Ru(pp)(pp')Cl(2)] and the natural amino acids l- or d-proline and relies on a dynamic asymmetric transformation under thermodynamic control.
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Affiliation(s)
- Chen Fu
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse, 35043 Marburg, Germany
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87
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Chen LA, Ma J, Celik MA, Yu HL, Cao Z, Frenking G, Gong L, Meggers E. Active versus passive substituent participation in the auxiliary-mediated asymmetric synthesis of an octahedral metal complex. Chem Asian J 2012; 7:2523-6. [PMID: 22915359 DOI: 10.1002/asia.201200532] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Indexed: 11/07/2022]
Abstract
Ambiguous chirality transfer: A surprising reversal of chirality transfer from carbon to metal is reported in the asymmetric synthesis of a chiral ruthenium complex, affording the metal-centered configuration Λ or Δ depending only on the chemical composition of the side chain of a chiral salicyloxazoline auxiliary.
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Affiliation(s)
- Liang-An Chen
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, PR China
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88
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Marchi E, Sinisi R, Bergamini G, Tragni M, Monari M, Bandini M, Ceroni P. Easy separation of Δ and Λ isomers of highly luminescent [Ir(III)]-cyclometalated complexes based on chiral phenol-oxazoline ancillary ligands. Chemistry 2012; 18:8765-73. [PMID: 22689328 DOI: 10.1002/chem.201200709] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Indexed: 11/06/2022]
Abstract
A new class of neutral cyclometalated iridium(III) complexes with enantiomerically pure C(1)-symmetric phenol-oxazolines (3a,b) have been synthetized in high yields and fully characterized. Resolution of the corresponding Δ(R) and Λ(R) or Δ(S) and Λ(S) isomers was easily achieved by conventional flash chromatography. The corresponding Δ and Λ helicities have been confirmed by CD spectroscopy and X-ray crystallography. Regarding the absorption and luminescence properties with unpolarized light, no significant difference between Δ and Λ isomers has been observed. A strong blue luminescence is observed for deaerated solutions of complexes 5a and 5b in CH(3)CN.
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Affiliation(s)
- Enrico Marchi
- Dipartimento di Chimica G. Ciamician, Alma Mater Studiorum, Università di Bologna via Selmi 2, 40126 Bologna 40126, Italy
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89
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Dubarle-Offner J, Axet MR, Chamoreau LM, Amouri H, Cooksy AL. Enantiomerically Pure, Planar Chiral Cp*Ru Complexes: Synthesis, Molecular Structures, DFT and Coordination Properties. Organometallics 2012. [DOI: 10.1021/om300210c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Julien Dubarle-Offner
- UPMC Université Paris 06, Institut Parisien
de Chimie Moléculaire (UMR CNRS 7201),
4 place Jussieu, C. 42, 75252 Paris Cedex 05, France
| | - M. Rosa Axet
- UPMC Université Paris 06, Institut Parisien
de Chimie Moléculaire (UMR CNRS 7201),
4 place Jussieu, C. 42, 75252 Paris Cedex 05, France
| | - Lise Marie Chamoreau
- UPMC Université Paris 06, Institut Parisien
de Chimie Moléculaire (UMR CNRS 7201),
4 place Jussieu, C. 42, 75252 Paris Cedex 05, France
| | - Hani Amouri
- UPMC Université Paris 06, Institut Parisien
de Chimie Moléculaire (UMR CNRS 7201),
4 place Jussieu, C. 42, 75252 Paris Cedex 05, France
| | - Andrew L. Cooksy
- Department of Chemistry
and Biochemistry, San Diego State University, 5500 Campanile Drive, San Diego, California 92182-1030, United
States
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90
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Wenzel M, Meggers E. Chiral (Mercaptophenyl)oxazolines as Auxiliaries for Asymmetric Coordination Chemistry. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200203] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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91
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Rama G, Ardá A, Maréchal JD, Gamba I, Ishida H, Jiménez-Barbero J, Vázquez ME, Vázquez López M. Stereoselective Formation of Chiral Metallopeptides. Chemistry 2012; 18:7030-5. [DOI: 10.1002/chem.201201036] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2012] [Indexed: 12/23/2022]
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92
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Câmpian MV, Perutz RN, Procacci B, Thatcher RJ, Torres O, Whitwood AC. Selective Photochemistry at Stereogenic Metal and Ligand Centers of cis-[Ru(diphosphine)2(H)2]: Preparative, NMR, Solid State, and Laser Flash Studies. J Am Chem Soc 2012; 134:3480-97. [DOI: 10.1021/ja210568t] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
| | - Robin N. Perutz
- Department of Chemistry, University of York, York YO10 5DD, U.K
| | | | | | - Olga Torres
- Department of Chemistry, University of York, York YO10 5DD, U.K
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93
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Bauer EB. Chiral-at-metal complexes and their catalytic applications in organic synthesis. Chem Soc Rev 2012; 41:3153-67. [PMID: 22306968 DOI: 10.1039/c2cs15234g] [Citation(s) in RCA: 204] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
This tutorial review provides an introduction to the synthesis and characterization of chiral-at-metal complexes and their catalytic application in organic transformations. The synthetic access to these architectures either via chiral resolution or by employment of chiral ligands is described, characterization techniques for the complexes are referenced and the application of the R/S nomenclature is explained. Racemization and epimerization processes are often observed for the title compounds; the article gives mechanistic insights to these processes and describes how to recognize and document them. Finally, key catalytic applications in organic synthesis are presented and how the molecular architectures of the chiral-at-metal complexes lead to stereodifferentiation and, thus to enantiomeric excesses in the products.
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Affiliation(s)
- Eike B Bauer
- University of Missouri-St. Louis, Department of Chemistry and Biochemistry, One University Boulevard, St. Louis, MO 63121, USA.
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94
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Crassous J. Transfer of chirality from ligands to metal centers: recent examples. Chem Commun (Camb) 2012; 48:9684-92. [DOI: 10.1039/c2cc31542d] [Citation(s) in RCA: 160] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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95
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Tan YH, Wu JJ, Zhou HY, Yang LF, Ye BH. Anion and pH induced spontaneous resolution of Δ- and Λ-[M(H2Biim)3]SO4 (M = Ru2+, Co2+, Ni2+, Mn2+, Fe2+, and Zn2+) enantiomers. CrystEngComm 2012. [DOI: 10.1039/c2ce26334c] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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96
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Vadavi R, Conrad ED, Arbuckle DI, Cameron TS, Essoun E, Aquino MAS. Chiral Induction via the Disassembly of Diruthenium(II,III) Tetraacetate by Chiral Diphosphines. Inorg Chem 2011; 50:11862-4. [DOI: 10.1021/ic202013m] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ramesh Vadavi
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - Eamonn D. Conrad
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - D. Ian Arbuckle
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - T. Stanley Cameron
- Department of Chemistry, Dalhousie University, Halifax, Nova
Scotia B3H 4J3, Canada
| | - Ernest Essoun
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
| | - Manuel A. S. Aquino
- Department of Chemistry, St. Francis Xavier University, P.O.
Box 5000, Antigonish, Nova Scotia B2G 2W5, Canada
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97
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Lin Z, Celik MA, Fu C, Harms K, Frenking G, Meggers E. N-Sulfinylcarboximidates as a New Class of Chiral Bidentate Ligands: Application to Asymmetric Coordination Chemistry. Chemistry 2011; 17:12602-5. [DOI: 10.1002/chem.201101886] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2011] [Indexed: 11/11/2022]
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