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Carneiro Neto JS, Iwaya EM, Santana FS, Soares JF. Crystal structure of a three-coordinate lithium complex with monodentate phenyl-oxazoline and hexa-methyl-disilyl-amide ligands. Acta Crystallogr E Crystallogr Commun 2024; 80:620-624. [PMID: 38845724 PMCID: PMC11151324 DOI: 10.1107/s2056989024004237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2024] [Accepted: 05/08/2024] [Indexed: 06/09/2024]
Abstract
The reaction of lithium hexa-methyl-disilyl-amide, [Li{N(Si(CH3)3)2}] (LiHMDS), with 4,4-dimethyl-2-phenyl-2-oxazoline (Phox, C11H13NO) in hexane produced colourless crystals of bis-(4,4-dimethyl-2-phenyl-2-oxazoline-κN)(hexa-methyl-disilyl-amido-κN)lithium, [Li(C6H18NSi2)(C11H13NO)2] or [Li{N(Si(CH3)3)2}(Phox)2] in high yield (89%). Despite the 1:1 proportion of the starting materials in the reaction mixture, the product formed with a 1:2 amide:oxazoline ratio. In the unit cell of the C2/c space group, the neutral mol-ecules lie on twofold rotation axes coinciding with the Li-N(amide) bonds. The lithium(I) centre adopts a trigonal-planar coordination geometry with three nitro-gen donor atoms, one from the HMDS anion and two from the oxazolines. All ligands are monodentate. In the phenyl-oxazoline units, the dihedral angle defined by the five-membered heterocyclic rings is 35.81 (5)°, while the phenyl substituents are approximately face-to-face, separated by 3.908 (5) Å. In the amide, the methyl groups assume a nearly eclipsed arrangement to minimize steric repulsion with the analogous substituents on the oxazoline rings. The non-covalent inter-actions in the solid-state structure of [Li{N(Si(CH3)3)2}(Phox)2] were assessed by Hirshfeld surface analysis and fingerprint plots. This new compound is attractive for catalysis due to its unique structural features.
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Affiliation(s)
- José Severiano Carneiro Neto
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, 81530-900, Curitiba-PR, Brazil
| | - Eduardo Mariano Iwaya
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, 81530-900, Curitiba-PR, Brazil
| | - Francielli Sousa Santana
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, 81530-900, Curitiba-PR, Brazil
| | - Jaísa Fernandes Soares
- Departamento de Química, Universidade Federal do Paraná, Centro Politécnico, Jardim das Américas, 81530-900, Curitiba-PR, Brazil
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2
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Liu X, Tomita K, Konishi A, Yasuda M. Cage-Shaped Phosphites Having C 3 -Symmetric Chiral Environment: Steric Control of Lewis Basicity and Application as Chiral Ligands in Rhodium-Catalyzed Conjugate Additions. Chemistry 2023; 29:e202302611. [PMID: 37666793 DOI: 10.1002/chem.202302611] [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: 08/10/2023] [Revised: 08/31/2023] [Accepted: 09/04/2023] [Indexed: 09/06/2023]
Abstract
Designing chiral ligands with an axial symmetry higher than C2 -rotational symmetry is one of the most crucial approaches to improving enantioselectivity in asymmetric synthesis. Herein, C3 -symmetric chiral cage-shaped phosphites are reported. Their Lewis basicity and chiral environment are precisely controlled by the tethered group. The cage-shaped phosphites successfully worked as chiral ligands in Rh-catalyzed asymmetric conjugate additions, realizing acceptable yields with excellent enantioselectivity, and were used to synthesize a pharmacologically important molecule.
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Affiliation(s)
- Xiao Liu
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Kazuma Tomita
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
| | - Akihito Konishi
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka, 565-0871, Japan
| | - Makoto Yasuda
- Department of Applied Chemistry, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, 565-0871, Japan
- Innovative Catalysis Science Division, Institute for Open and Transdisciplinary Research Initiatives (ICS-OTRI), Osaka University, Suita, Osaka, 565-0871, Japan
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3
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Huang H, Lin YM, Gong L. Recent Advances in Photochemical Asymmetric Three-Component Reactions. CHEM REC 2023:e202300275. [PMID: 37772656 DOI: 10.1002/tcr.202300275] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2023] [Revised: 09/18/2023] [Indexed: 09/30/2023]
Abstract
Over the past decades, asymmetric photochemical synthesis has garnered significant attention for its sustainability and unique ability to generate enantio-enriched molecules through distinct reaction pathways. Photochemical asymmetric three-component reactions have demonstrated significant potential for the rapid construction of chiral compounds with molecular diversity and complexity. However, noteworthy challenges persist, including the participation of high-energy intermediates such as radical species, difficulties in precise control of stereoselectivity, and the presence of competing background and side reactions. Recent breakthroughs have led to the development of sophisticated strategies in this field. This review explores the intricate mechanisms, synthetic applications, and limitations of these methods. We anticipate that it will contribute towards advancing asymmetric catalysis, photochemical synthesis, and green chemistry.
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Affiliation(s)
- Haichao Huang
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Yu-Mei Lin
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
- Innovation Laboratory for Sciences and Technologies of Energy Materials of Fujian Province (IKKEM), Xiamen University, Xiamen, Fujian 361005, China
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4
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Aliphatic C–H hydroxylation activity and durability of a nickel complex catalyst according to the molecular structure of the bis(oxazoline) ligands. MOLECULAR CATALYSIS 2021. [DOI: 10.1016/j.mcat.2021.111718] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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5
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Synthesis of rigid chiral C3-symmetric triptycene-based ligands and their application in enantioselective Cu(I)-catalyzed aziridination of chalcones. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121804] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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6
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Luo J, Chen GS, Chen SJ, Li ZD, Liu YL. Catalytic Enantioselective Isocyanide-Based Reactions: Beyond Passerini and Ugi Multicomponent Reactions. Chemistry 2021; 27:6598-6619. [PMID: 32964538 DOI: 10.1002/chem.202003224] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Indexed: 12/19/2022]
Abstract
The development of catalytic enantioselective isocyanide-based reactions is currently of great interest because the resulting products are valuable in organic synthesis, pharmacological chemistry, and materials science. This review assembles and comprehensively summarizes the recent achievements in this rapidly growing area according to the reaction types. Special attention is paid to the advantages, limitations, possible mechanisms, and synthetic applications of each reaction. In addition, a personal outlook on the opportunities for further exploration is given at the end.
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Affiliation(s)
- Jian Luo
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou, 510006, P. R. China
| | - Guo-Shu Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou, 510006, P. R. China
| | - Shu-Jie Chen
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou, 510006, P. R. China
| | - Zhao-Dong Li
- Department of Applied Chemistry, College of Materials and Energy, South China Agricultural University, Wushan Street five road No. 483, Guangzhou, 510642, P. R. China
| | - Yun-Lin Liu
- School of Chemistry and Chemical Engineering, Guangzhou University, 230 Wai Huan Xi Road, Guangzhou, 510006, P. R. China
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7
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Divalent cobalt and copper coordination complexes of κ2-N, O-derivatives of (Z)-1-R-2-(2′-oxazolin-2′-yl)-eth-1-en-1-ates: Structure and reactivity patterns. Inorganica Chim Acta 2021. [DOI: 10.1016/j.ica.2020.119959] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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8
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Behlen MJ, Uyeda C. C2-Symmetric Dinickel Catalysts for Enantioselective [4 + 1]-Cycloadditions. J Am Chem Soc 2020; 142:17294-17300. [PMID: 32972140 DOI: 10.1021/jacs.0c08262] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Dinickel naphthyridine-bis(oxazoline) catalysts promote enantioselective intermolecular [4 + 1]-cycloadditions of vinylidene equivalents and 1,3-dienes. The products of this reaction are methylenecyclopentenes, and the exocyclic alkene is generally obtained with high Z selectivity. E- and Z-dienes react in a stereoconvergent fashion, providing cycloadducts with the same sense of absolute stereochemistry and nearly identical ee values. This feature allows dienes that are commercially available as E/Z mixtures to be used as substrates for the cycloaddition. A DFT model for the origin of asymmetric induction is provided.
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Affiliation(s)
- Michael J Behlen
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
| | - Christopher Uyeda
- Department of Chemistry, Purdue University, West Lafayette, Indiana 47907, United States
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9
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Yamamoto K, Tsuda Y, Kuriyama M, Demizu Y, Onomura O. Copper-Catalyzed Enantioselective Synthesis of Oxazolines from Aminotriols via Asymmetric Desymmetrization. Chem Asian J 2020; 15:840-844. [PMID: 32030893 DOI: 10.1002/asia.201901742] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2019] [Revised: 01/28/2020] [Indexed: 11/06/2022]
Abstract
A copper-catalyzed enantioselective transformation of tris(hydroxymethyl)aminomethane-derived aminotriols was developed to provide multisubstituted oxazolines with a tetrasubstituted carbon center. The present transformation consisted of sequential reactions involving mono-sulfonylation of aminotriols, subsequent intramolecular cyclization to afford prochiral oxazoline diols, and sulfonylative asymmetric desymmetrization of resultant oxazoline diols. In addition, the kinetic resolution process would be involved in the sulfonylative asymmetric desymmetrization step, which would amplify the enantiopurities of the desired products. Various aminotriols were tolerated in the present reaction, affording the desired oxazolines in good to high yields with excellent enantioselectivities. The synthetic utility of the present reaction was demonstrated by the transformation of the optically active oxazoline into a chiral α-tertiary amine motif.
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Affiliation(s)
- Kosuke Yamamoto
- Graduate School of Biomedical Sciences, Nagasaki University 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Yutaro Tsuda
- Graduate School of Biomedical Sciences, Nagasaki University 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Masami Kuriyama
- Graduate School of Biomedical Sciences, Nagasaki University 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Yosuke Demizu
- Graduate School of Biomedical Sciences, Nagasaki University 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
| | - Osamu Onomura
- Graduate School of Biomedical Sciences, Nagasaki University 1-14 Bunkyo-machi, Nagasaki, 852-8521, Japan
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10
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Buchsteiner M, Martinez‐Rodriguez L, Jerabek P, Pozo I, Patzer M, Nöthling N, Lehmann CW, Fürstner A. Catalytic Asymmetric Fluorination of Copper Carbene Complexes: Preparative Advances and a Mechanistic Rationale. Chemistry 2020; 26:2509-2515. [PMID: 31916634 PMCID: PMC7065061 DOI: 10.1002/chem.202000081] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Indexed: 01/21/2023]
Abstract
The Cu-catalyzed reaction of substituted α-diazoesters with fluoride gives α-fluoroesters with ee values of up to 95 %, provided that chiral indane-derived bis(oxazoline) ligands are used that carry bulky benzyl substituents at the bridge and moderately bulky isopropyl groups on their core. The apparently homogeneous solution of CsF in C6 F6 /hexafluoroisopropanol (HFIP) is the best reaction medium, but CsF in the biphasic mixture CH2 Cl2 /HFIP also provides good results. DFT studies suggest that fluoride initially attacks the Cu- rather than the C-atom of the transient donor/acceptor carbene intermediate. This unusual step is followed by 1,2-fluoride shift; for this migratory insertion to occur, the carbene must rotate about the Cu-C bond to ensure orbital overlap. The directionality of this rotatory movement within the C2 -symmetric binding site determines the sense of induction. This model is in excellent accord with the absolute configuration of the resulting product as determined by X-ray diffraction using single crystals of this a priori wax-like material grown by capillary crystallization.
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Affiliation(s)
| | | | - Paul Jerabek
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
- Present Address: Nanotechnology DepartmentHelmholtz-Zentrum Geesthacht21502GeesthachtGermany
| | - Iago Pozo
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Michael Patzer
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
| | | | - Alois Fürstner
- Max-Planck-Institut für Kohlenforschung45470Mülheim/RuhrGermany
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11
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Hu WT, Li XY, Gui WT, Yu JY, Wen W, Guo QX. Chiral Bis(oxazoline)–Copper Complex Catalyzed Asymmetric Alkenylation of Isatin Imines and 3-Vinylindoles for Construction of Optically Active 3-Alkenyl-3-aminooxindoles. Org Lett 2019; 21:10090-10093. [DOI: 10.1021/acs.orglett.9b04063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Wei-Ting Hu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Xiao-Yun Li
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Wu-Tao Gui
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Jia-Yu Yu
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Wei Wen
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
| | - Qi-Xiang Guo
- Key Laboratory of Applied Chemistry of Chongqing Municipality, School of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, China
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12
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Ganga-Sah Y, Leznoff DB, Bennet AJ. Synthesis of Sterically Congested 2,2'-Bi(Adamantyl)-Based Alcohol and Amines. J Org Chem 2019; 84:15276-15282. [PMID: 31682451 DOI: 10.1021/acs.joc.9b02293] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Sterically congested chiral alcohol and amines have gained tremendous attention in the design of asymmetric catalysts. Herein, the synthesis of a sterically congested bis-adamantane framework-based chiral alcohol, (1R,2S,3S,4R)-4-(2-adamantyl)adamantan-2-ol, and amine, (1R,2S,3S,4R)-4-(2-adamantyl)adamantan-2-amine, is described. Access to these sterically encumbered compounds is found via the preparation of an enantioenriched 4-adamantyladamantan-2-one intermediate, which was synthesized in 6 steps from adamantan-2-one. The key step involved enzyme-catalyzed ester hydrolysis in giving unsaturated alcohol with an enantiomeric excess of >95%. This adamantylidene adamantanol was subjected to an acid-catalyzed intramolecular [1,4] shift to give the key chiral intermediate without racemization. This ketone intermediate was transformed into the target compounds via reduction and reductive amination protocols.
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Affiliation(s)
- Yumeela Ganga-Sah
- Department of Chemistry , Simon Fraser University , 8888 University Drive , Burnaby , British Columbia V5A 1S6 , Canada
| | - Daniel B Leznoff
- Department of Chemistry , Simon Fraser University , 8888 University Drive , Burnaby , British Columbia V5A 1S6 , Canada
| | - Andrew J Bennet
- Department of Chemistry , Simon Fraser University , 8888 University Drive , Burnaby , British Columbia V5A 1S6 , Canada
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13
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Ueda K, Ohyama J, Sawabe K, Satsuma A. Structure–Activity Relationship of Iron Oxides for NO Reduction in the Presence of C
3
H
6
, CO, and O
2. Chemistry 2019; 25:13964-13971. [DOI: 10.1002/chem.201902994] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Kakuya Ueda
- Graduate School of EngineeringNagoya University Nagoya 464-8603 Japan
| | - Junya Ohyama
- Unit of Elements Strategy Initiative for Catalysts & BatteriesKyoto University Kyoto 615-8530 Japan
- Faculty of Advanced Science and TechnologyKumamoto University Kumamoto 860-8555 Japan
| | - Kyoichi Sawabe
- Graduate School of EngineeringNagoya University Nagoya 464-8603 Japan
| | - Atsushi Satsuma
- Graduate School of EngineeringNagoya University Nagoya 464-8603 Japan
- Unit of Elements Strategy Initiative for Catalysts & BatteriesKyoto University Kyoto 615-8530 Japan
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14
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Grell Y, Demirel N, Harms K, Meggers E. Chiral Bis(oxazoline) Ligands as C2-Symmetric Chiral Auxiliaries for the Synthesis of Enantiomerically Pure Bis-Cyclometalated Rhodium(III) Complexes. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00533] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Yvonne Grell
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Nemrud Demirel
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Klaus Harms
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
| | - Eric Meggers
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein-Strasse 4, 35043 Marburg, Germany
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15
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Han B, Li Y, Yu Y, Gong L. Photocatalytic enantioselective α-aminoalkylation of acyclic imine derivatives by a chiral copper catalyst. Nat Commun 2019; 10:3804. [PMID: 31444326 PMCID: PMC6707287 DOI: 10.1038/s41467-019-11688-7] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 07/30/2019] [Indexed: 11/08/2022] Open
Abstract
Copper-based asymmetric photocatalysis has great potential in the development of green synthetic approaches to chiral molecules. However, there are several formidable challenges associated with such a conception. These include the relatively weak visible light absorption, short excited-state lifetimes, incompatibility of different catalytic cycles, and the difficulty of the stereocontrol. We report here an effective strategy by means of single-electron-transfer (SET) initiated formation of radicals and photoactive intermediates to address the long-standing problems. Through elaborate selection of well-matched reaction partners, the chiral bisoxazoline copper catalyst is engaged in the SET process, photoredox catalysis, Lewis acid activation and asymmetric induction. Accordingly, a highly enantioselective photocatalytic α-aminoalkylation of acyclic imine derivatives has been accessed. This strategy sheds light on how to make use of diverse functions of a single transition metal catalyst in one reaction, and offers an economic and simplified approach to construction of highly valuable chiral vicinal diamines.
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Affiliation(s)
- Bowen Han
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Yanjun Li
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Ying Yu
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, Fujian, China.
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16
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Designing chiral amido-oxazolines as new chelating ligands devoted to direct Cu-catalyzed oxidation of allylic C H bonds in cyclic olefins. Tetrahedron 2019. [DOI: 10.1016/j.tet.2018.12.062] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Heravi MM, Zadsirjan V, Masoumi B, Heydari M. Organometal-catalyzed asymmetric Friedel-Crafts reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2018.10.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Adly FG, Marichev KO, Jensen JA, Arman H, Doyle MP. Enoldiazosulfones for Highly Enantioselective [3 + 3]-Cycloaddition with Nitrones Catalyzed by Copper(I) with Chiral BOX Ligands. Org Lett 2018; 21:40-44. [DOI: 10.1021/acs.orglett.8b03421] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Frady G. Adly
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
- Faculty of Science and Technology, University of Canberra, Canberra, Australian Capital Territory 2601, Australia
| | - Kostiantyn O. Marichev
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Joseph A. Jensen
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hadi Arman
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Michael P. Doyle
- Department of Chemistry, University of Texas at San Antonio, San Antonio, Texas 78249, United States
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19
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Li Y, Zhou K, Wen Z, Cao S, Shen X, Lei M, Gong L. Copper(II)-Catalyzed Asymmetric Photoredox Reactions: Enantioselective Alkylation of Imines Driven by Visible Light. J Am Chem Soc 2018; 140:15850-15858. [DOI: 10.1021/jacs.8b09251] [Citation(s) in RCA: 131] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Yanjun Li
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Kexu Zhou
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Zhaorui Wen
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Shi Cao
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Xiang Shen
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Meng Lei
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
| | - Lei Gong
- Key Laboratory of Chemical Biology of Fujian Province, iChEM, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, Fujian 361005, China
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20
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Yoshizawa A, Feula A, Male L, Leach AG, Fossey JS. Rigid and concave, 2,4-cis-substituted azetidine derivatives: A platform for asymmetric catalysis. Sci Rep 2018; 8:6541. [PMID: 29695806 PMCID: PMC5916886 DOI: 10.1038/s41598-018-24784-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Accepted: 03/26/2018] [Indexed: 11/25/2022] Open
Abstract
A series of single enantiomer, 2,4-cis-disubstituted amino azetidines were synthesised and used as ligands for copper-catalysed Henry reactions of aldehydes with nitromethane. Optimisation of ligand substituents and the reaction conditions was conducted. The enantiomeric excess of the formed products was highest when alkyl aldehydes were employed in the reaction (>99% e.e.). The absolute stereochemistry of one representative azetidine derivative salt was determined by analysis of the Flack parameter of an XRD single crystal structure. The origin of selectivity in catalysis was investigated computationally, revealing the importance of the amino-substituent in determining the stereochemical outcome. A racemic platinum complex of a cis-disubstituted azetidine is examined by XRD single crystal structure analysis with reference to its steric parameters, and analogies to the computationally determined copper complex catalyst are drawn. A preliminary example of the use of a cis-disubstituted azetidine scaffold in thiourea H-bonding catalyst is noted in the supporting information.
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Affiliation(s)
- Akina Yoshizawa
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Antonio Feula
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Louise Male
- X-Ray Crystallography Facility, School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK
| | - Andrew G Leach
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Byrom Street, Liverpool, L3 3AF, UK.
| | - John S Fossey
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, West Midlands, B15 2TT, UK.
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21
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Land MA, Huo B, Robertson KN, Ylijoki KEO, Lee PTK, Areephong J, Vidović D, Clyburne JAC. Coordination, reactivity, and structural properties of electron-rich ethoxy- and dimethylamino-substituted 1,3-diketiminate ligands and their complexes. Dalton Trans 2018; 47:10195-10205. [DOI: 10.1039/c8dt01875h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two new anionic ligands L and their metal complexes ZnL2, (CH3)2AlL, and LRh(CO)2 (shown) have been prepared and fully characterized.
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Affiliation(s)
- Michael A. Land
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | - Bright Huo
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | - Katherine N. Robertson
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | - Kai E. O. Ylijoki
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | - Peter T. K. Lee
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | - Jetsuda Areephong
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
| | | | - Jason A. C. Clyburne
- The Atlantic Centre for Green Chemistry
- Department of Chemistry
- Saint Mary's University
- Halifax
- Canada
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22
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Abstract
This highlight focuses on the recent development of oxazoline-based discrete coordination complexes and coordination polymers.
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Affiliation(s)
- Yong-Qing Huang
- State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology
- College of Chemical and Environmental Engineering
- Shandong University of Science and Technology
- Qingdao 266590
- China
| | - Wei-Yin Sun
- Coordination Chemistry Institute
- State Key Laboratory of Coordination Chemistry
- School of Chemistry and Chemical Engineering
- Nanjing National Laboratory of Microstructures
- Collaborative Innovation Center of Advanced Microstructures
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23
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Chiral metal cluster and nanocluster complexes and their application in asymmetric catalysis. Tetrahedron Lett 2018. [DOI: 10.1016/j.tetlet.2017.12.006] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Arai T. Chiral Bis(imidazolidine)-containing NCN Pincer Metal Complexes for Cooperative Asymmetric Catalysis. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.3] [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)
- Takayoshi Arai
- Department of Chemistry, Graduate School of Science, Chiba University
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25
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Koehne I, Graw N, Teuteberg T, Herbst-Irmer R, Stalke D. Introducing NacNac-Like Bis(4,6-isopropylbenzoxazol-2-yl)methanide in s-Block Metal Coordination. Inorg Chem 2017; 56:14968-14978. [DOI: 10.1021/acs.inorgchem.7b02276] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Ingo Koehne
- Institut für
Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
| | - Nico Graw
- Institut für
Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
| | - Thorsten Teuteberg
- Institut für Physikalische Chemie, Georg-August-Universität Göttingen, Tammannstraße 6, 37077 Göttingen, Germany
| | - Regine Herbst-Irmer
- Institut für
Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
| | - Dietmar Stalke
- Institut für
Anorganische Chemie, Georg-August-Universität Göttingen, Tammannstraße
4, 37077 Göttingen, Germany
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26
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Abstract
The first enantioselective addition of nitroalkanes to imines (nitro-Mannich reaction), mediated by an iron(II) catalyst assembled by a hindered hydroxyethyl-pybox ligand, is described. This valuable carbon-carbon bond-forming reaction proceeds smoothly at room temperature to afford enantioenriched β-nitro amines in good yields and high enantioselectivity, up to 98% with unprecedentedly low iron catalyst loading (5 mol %).
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Affiliation(s)
| | - Jacek Mlynarski
- Faculty of Chemistry, Jagiellonian University , Ingardena 3, 30-060 Krakow, Poland.,Institute of Organic Chemistry, Polish Academy of Sciences , Kasprzaka 44/52, 01-224 Warsaw, Poland
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27
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Tsutsumi K, Itagaki K, Nomura K. Synthesis and Structural Analysis of Palladium(II) Complexes Containing Neutral or Anionic C 2-Symmetric Bis(oxazoline) Ligands: Effects of Substituents in the 5-Position. ACS OMEGA 2017; 2:3886-3900. [PMID: 31457695 PMCID: PMC6641513 DOI: 10.1021/acsomega.7b00457] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2017] [Accepted: 07/12/2017] [Indexed: 06/10/2023]
Abstract
A series of neutral and cationic palladium(II) complexes containing C 2-symmetric bis(oxazoline) (BOX) ligands, (BOX)PdCl2 (2a-d), (BOX)Pd(Me)Cl (3a-d), and [(BOX)PdMe(2,6-Me2C5H3N)]+PF6 - (4a-d) [BOX: 2,2'-(2-propylidene)bis{(4R)-4-phenyl-5,5-dimethyl-2-oxazoline}, 2,2'-methylenebis{(4R)-4-phenyl-5,5-dimethyl-2-oxazoline}, 2,2'-methylenebis{(4R)-4,5,5-triphenyl-2-oxazoline}, and 2,2'-methylenebis{(4R,5S)-4,5-diphenyl-2-oxazoline}], were prepared, and their structures were determined by X-ray crystallography. It was found that substituents at the 5-position (Ph, Me) in addition to substituents on the bridgehead carbon directly affect the structure around palladium, especially the BOX bite angle and the dihedral angles between the phenyl rings at the 4-position and the N2Pd plane. Treatment of the bridged methylene proton in the BOX ligand (1b-d) with KH afforded the anionic BOX ligand; also, the neutral Pd complexes, (BOX)PdMe(2,6-Me2C5H3N) (5b-d), could thus be prepared by reaction with Pd(Me)Cl(cod) (cod = 1,5-cyclooctadiene); 5b-d showed strong coordination to Pd, as demonstrated by X-ray crystallographic analysis.
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Affiliation(s)
- Ken Tsutsumi
- Department
of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
| | - Koji Itagaki
- Graduate
School of Materials Science, Nara Institute
of Science and Technology (NAIST), Takayama, Ikoma, Nara 630-0192, Japan
| | - Kotohiro Nomura
- Department
of Chemistry, Faculty of Science and Engineering, Tokyo Metropolitan University, 1-1 Minami Osawa, Hachioji, Tokyo 192-0397, Japan
- Graduate
School of Materials Science, Nara Institute
of Science and Technology (NAIST), Takayama, Ikoma, Nara 630-0192, Japan
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28
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Milbeo P, Moulat L, Didierjean C, Aubert E, Martinez J, Calmès M. Synthesis of Enantiopure 1,2-Diaminobicyclo[2.2.2]octane Derivatives, C1-Symmetric Chiral 1,2-Diamines with a Rigid Bicyclic Backbone. J Org Chem 2017; 82:3144-3151. [DOI: 10.1021/acs.joc.7b00122] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Pierre Milbeo
- IBMM,
UMR-5247, CNRS, Université Montpellier, ENSCM, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Laure Moulat
- IBMM,
UMR-5247, CNRS, Université Montpellier, ENSCM, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Claude Didierjean
- CRM2,
UMR 7036, CNRS, Université de Lorraine, Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France
| | - Emmanuel Aubert
- CRM2,
UMR 7036, CNRS, Université de Lorraine, Boulevard des Aiguillettes, 54506 Vandoeuvre-lès-Nancy, France
| | - Jean Martinez
- IBMM,
UMR-5247, CNRS, Université Montpellier, ENSCM, Place E. Bataillon, 34095 Montpellier Cedex 5, France
| | - Monique Calmès
- IBMM,
UMR-5247, CNRS, Université Montpellier, ENSCM, Place E. Bataillon, 34095 Montpellier Cedex 5, France
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29
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Desyatkin VG, Anokhin MV, Rodionov VO, Beletskaya IP. Polystyrene-supported cu(II)-R-Box as recyclable catalyst in asymmetric Friedel–Crafts reaction. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2017. [DOI: 10.1134/s1070428016120010] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Bellemin-Laponnaz S, Achard T, Bissessar D, Geiger Y, Maisse-François A. Synthesis and application of dynamic self-supported enantioselective catalysts. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.10.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Synthesis and thermal properties of salts comprising cationic bis(oxazoline)-AuIII complexes and fluorinated anions. Polyhedron 2016. [DOI: 10.1016/j.poly.2016.04.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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32
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Bleith T, Deng QH, Wadepohl H, Gade LH. Radical Changes in Lewis Acid Catalysis: Matching Metal and Substrate. Angew Chem Int Ed Engl 2016; 55:7852-6. [DOI: 10.1002/anie.201603072] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Tim Bleith
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Qing-Hai Deng
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 P.R. China
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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33
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Bleith T, Deng QH, Wadepohl H, Gade LH. Radical Changes in Lewis Acid Catalysis: Matching Metal and Substrate. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201603072] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Tim Bleith
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Qing-Hai Deng
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
- The Education Ministry Key Lab of Resource Chemistry and Shanghai Key Laboratory of Rare Earth Functional Materials; Shanghai Normal University; Shanghai 200234 P.R. China
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz H. Gade
- Anorganisch-Chemisches Institut; Universität Heidelberg; Im Neuenheimer Feld 270 69120 Heidelberg Germany
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34
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Wang J, Huang C, Gao K, Wang X, Liu M, Ma H, Wu J, Hou H. Microcrystalline Zinc Coordination Polymers as Single-site Heterogeneous Catalysts for the Selective Synthesis of Mono-oxazolines from Amino Alcohol and Dinitriles. Chem Asian J 2016; 11:1856-62. [DOI: 10.1002/asia.201600434] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Junning Wang
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Chao Huang
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Kuan Gao
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Xiaolu Wang
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Mengjia Liu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Haoran Ma
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Jie Wu
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
| | - Hongwei Hou
- College of Chemistry and Molecular Engineering; Zhengzhou University; Zhengzhou China
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35
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Huang C, Wang H, Wang X, Gao K, Wu J, Hou H, Fan Y. Surfactant-Assisted Nanocrystalline Zinc Coordination Polymers: Controlled Particle Sizes and Synergistic Effects in Catalysis. Chemistry 2016; 22:6389-96. [DOI: 10.1002/chem.201505009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Chao Huang
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Huarui Wang
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Xiaolu Wang
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Kuan Gao
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Jie Wu
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Hongwei Hou
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
| | - Yaoting Fan
- The College of Chemistry and Molecular Engineering; Zhengzhou University; Henan 450052 P.R. China
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36
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Zhao M, Li NK, Zhang YF, Pan FF, Wang XW. Construction of 3-amino-2-oxindoles by direct amination of aniline or α-amino-acid derivatives to 3-bromooxindoles. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.039] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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37
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Abstract
Asymmetric reactions catalyzed by iron complexes have attracted considerable attention because iron is a ubiquitous, inexpensive, and environmentally benign metal. This overview charts the development and application of chiral iron bis(oxazoline) and pyridine-2,6-bis(oxazoline) catalysts through their most prominent and innovative uses in asymmetric catalysis, especially in Lewis acid and oxidation catalysis.
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Affiliation(s)
- Thierry Ollevier
- Département de chimie
- Pavillon Alexandre-Vachon
- Université Laval
- Québec (Qc) G1V 0A6
- Canada
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38
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DELİKUŞ R, ÇAKIR E, DEMİREL N, BALCI M, KARATAŞ B. Synthesis of novel chiral bisoxazoline ligands with a norbornadiene backbone: use in the copper-catalyzed enantioselective Henry reaction. Turk J Chem 2016. [DOI: 10.3906/kim-1504-80] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
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39
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Yalcouye B, Berthelot-Bréhier A, Augros D, Panossian A, Choppin S, Chessé M, Colobert F, Leroux FR. Access to Atropisomerically Enriched Biaryls by the Coupling of Aryllithiums with Arynes under Control by Homochiral Oxazolines. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501503] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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40
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O’Reilly S, Aylward M, Keogh-Hansen C, Fitzpatrick B, McManus HA, Müller-Bunz H, Guiry PJ. Synthesis of Bis(oxazoline) Ligands Possessing C-5 gem-Disubstitution and Their Application in Asymmetric Friedel–Crafts Alkylations. J Org Chem 2015; 80:10177-86. [DOI: 10.1021/acs.joc.5b01767] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Steven O’Reilly
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Miriam Aylward
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Caoimhe Keogh-Hansen
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Brian Fitzpatrick
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Helen A. McManus
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Helge Müller-Bunz
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
| | - Patrick J. Guiry
- Centre
for Synthesis and
Chemical Biology, School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin 4, Ireland
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41
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Ueda Y, Yagishita F, Ishikawa H, Kaji Y, Baba N, Kasashima Y, Mino T, Sakamoto M. A new class of C2 chiral photodimer ligands for catalytic enantioselective diethylzinc addition to arylaldehydes. Tetrahedron 2015. [DOI: 10.1016/j.tet.2015.06.084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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42
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Metz AE, Ramalingam K, Kozlowski MC. Xanthene-4,5-diamine derivatives: a study of anion-binding catalysis. Tetrahedron Lett 2015; 56:5180-5184. [PMID: 26321769 DOI: 10.1016/j.tetlet.2015.07.058] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This study describes the synthesis of a class of anion-binding catalysts based on a xanthene scaffold. Both unsymmetrical catalysts and C2-symmetrical catalysts were generated, and were examined in the cyclization of 3- and 2-substituted furans onto N-acyliminium ions. Good conversion for each reaction was observed with a variety of anion-binding catalysts (42-76%).
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Affiliation(s)
- Alison E Metz
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Kailasham Ramalingam
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States
| | - Marisa C Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, Philadelphia, PA 19104, United States
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43
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Copper(I) and silver(I) complexes containing the enantiopure N,N-bidentate 1,3-bis[4′-(S)-isopropyloxazolin-2′-yl]benzene ((S,S)-iPr-pheboxH) ligand. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.04.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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44
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Jia WG, Li DD, Gu C, Dai YC, Zhou YH, Yuan G, Sheng EH. Two cadmium(II) complexes with oxazoline-based ligands as effective catalysts for C–N cross-coupling reactions. Inorganica Chim Acta 2015. [DOI: 10.1016/j.ica.2015.01.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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45
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Trost BM, Donckele EJ, Thaisrivongs DA, Osipov M, Masters JT. A New Class of Non-C2-Symmetric Ligands for Oxidative and Redox-Neutral Palladium-Catalyzed Asymmetric Allylic Alkylations of 1,3-Diketones. J Am Chem Soc 2015; 137:2776-84. [DOI: 10.1021/jacs.5b00786] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Barry M. Trost
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Etienne J. Donckele
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - David A. Thaisrivongs
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - Maksim Osipov
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
| | - James T. Masters
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States
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46
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Bansal D, Hundal G, Gupta R. A Metalloligand Appended with Thiazole Rings: Heterometallic {Co
3+
–Zn
2+
} and {Co
3+
–Cd
2+
} Complexes and Their Heterogeneous Catalytic Applications. Eur J Inorg Chem 2015. [DOI: 10.1002/ejic.201403072] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Deepak Bansal
- Department of Chemistry, University of Delhi, Delhi 110007, India, http://people.du.ac.in/~rgupta/
| | - Geeta Hundal
- Department of Chemistry, Guru Nanak Dev University, Amritsar, Punjab 143005, India
| | - Rajeev Gupta
- Department of Chemistry, University of Delhi, Delhi 110007, India, http://people.du.ac.in/~rgupta/
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47
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Bansal D, Pandey S, Hundal G, Gupta R. Heterometallic coordination polymers: syntheses, structures and heterogeneous catalytic applications. NEW J CHEM 2015. [DOI: 10.1039/c5nj01223f] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Heterometallic coordination polymers function as heterogeneous catalysts for various organic transformation reactions via preferential interaction with the substrates.
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Affiliation(s)
- Deepak Bansal
- Department of Chemistry
- University of Delhi
- Delhi, 110 007
- India
| | - Saurabh Pandey
- Department of Chemistry
- University of Delhi
- Delhi, 110 007
- India
| | - Geeta Hundal
- Department of Chemistry
- Guru Nanak Dev University
- Amritsar–143 005
- India
| | - Rajeev Gupta
- Department of Chemistry
- University of Delhi
- Delhi, 110 007
- India
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48
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The Future of Catalysis by Chiral Lewis Acids. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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50
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Raja S, Nakajima M, Rueping M. Experimental and computational study of the catalytic asymmetric 4π-electrocyclization of N-heterocycles. Angew Chem Int Ed Engl 2014; 54:2762-5. [PMID: 25533025 DOI: 10.1002/anie.201408020] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2014] [Revised: 11/05/2014] [Indexed: 11/12/2022]
Abstract
The first asymmetric metal-catalyzed Nazarov cyclization of N-heterocycles has been developed. The use of a chiral catalyst allows the enantioselective electrocyclization of N-heterocycles under mild conditions and the corresponding products are obtained in good yields with excellent enantio- and diastereoselectivity. The reaction mechanism and the absolute configuration of the obtained products are explained by means of computational studies.
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Affiliation(s)
- Sadiya Raja
- Institut of Organic Chemistry, RWTH Aachen, Landoltweg 1, 52074 Aachen (Germany)
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