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Noor A. Coordination Chemistry of Bulky Aminopryridinates with Main Group and Transition Metals. Top Curr Chem (Cham) 2021; 379:6. [PMID: 33428048 DOI: 10.1007/s41061-020-00320-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 12/08/2020] [Indexed: 10/22/2022]
Abstract
The coordination chemistry of bidentate aminopyridinato ligands (ApH), in particular 2-aminopyridines, is a highly popular area of research. Due to easy accessibility and versatility, 2-aminopyridines have played a prominent role as alternatives to cyclopentadienyl ligands in coordination chemistry. Easily modifiable steric bulks and the ability for fine-tuning of electronic effects have allowed researchers to control not only the metal-to-ligand stoichiometry but also the properties of their metal complexes. Previously, ligand redistribution was frequently observed for ligands of small steric demands. Bulky aminopyridinato ligands refer to ligands that incorporate alkyl-substituted phenyl groups at the amine/amido nitrogen and at the sixth position of the pyridine ring. The steric crowding allowed the stabilization of transition metals in unusually low oxidation conditions. One of the remarkable developments, for example, is the stabilization of metal-metal quintuple bonds by these ligands, thus providing a diamagnetic platform to study such systems chemically. Application of metal aminopyridinates in homogeneous catalysis has also broadened considerably in recent years. This review provides a comprehensive account of advances made with such ligands since their development for main group and transition elements.
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Affiliation(s)
- Awal Noor
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, Al-Hassa, 31982, Saudi Arabia.
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2
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Ríos P, Rodríguez A, Conejero S. Enhancing the catalytic properties of well-defined electrophilic platinum complexes. Chem Commun (Camb) 2020; 56:5333-5349. [PMID: 32373864 DOI: 10.1039/d0cc01438a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Platinum complexes have been often considered as the least reactive of the group 10 triad metals. Slow kinetics are behind this lack of reactivity but, still, some industrially relevant catalytic process are dominated by platinum compounds and sometimes different selectivities can be found in comparison to Ni or Pd. Nevertheless, during the last years, it has been reported that the catalytic behaviour of well-defined platinum derivatives can be improved through a judicious choice of their electronic and steric properties, leading to highly electrophilic or low-electron count platinum systems. In this feature article, we highlight some catalytic processes in which well-defined electrophilic platinum complexes or coordinatively unsaturated systems play an important role in their catalytic activity.
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Affiliation(s)
- Pablo Ríos
- Instituto de Investigaciones Químicas (IIQ), Departamento de Química Inorgánica, Centro de Innovación en Química Avanzada (ORFEO-CINQA), CSIC/Universidad de Sevilla, C/Américo Vespucio 49, 41092 Sevilla, Spain.
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3
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Noor A, Qayyum S, Schwarz S, Dietel T, Kempe R. Formation of a dimeric tungsten(i) complex via C-H activation. Dalton Trans 2020; 49:1992-1996. [PMID: 31984990 DOI: 10.1039/c9dt04847b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An aminopyridinato ligand stabilized and coordinatively unsaturated dimeric tungsten(0) complex having an electronic structure with six metal centred HOMOs (σ2,π2,π2,δ2,δ2, and δ*2) has been isolated and structurally characterized. Its reaction with a cryptand leads to a C-H bond activation of one of the isopropyl groups of the N-ligand to form a dimeric tungsten(i) complex.
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Affiliation(s)
- Awal Noor
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, 31982 Al-Hassa, Saudi Arabia. and Lehrstuhl Anorganische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany. and Department of Chemistry, COMSATS University Islamabad, Abbottabad Campus, Pakistan
| | - Sadaf Qayyum
- Department of Basic Sciences, Preparatory Year Deanship, King Faisal University, 31982 Al-Hassa, Saudi Arabia. and Lehrstuhl Anorganische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany.
| | - Stefan Schwarz
- Lehrstuhl Anorganische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany.
| | - Thomas Dietel
- Lehrstuhl Anorganische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany.
| | - Rhett Kempe
- Lehrstuhl Anorganische Chemie II, Universität Bayreuth, 95440 Bayreuth, Germany.
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Titanium catalyzed synthesis of amines and N-heterocycles. ADVANCES IN ORGANOMETALLIC CHEMISTRY 2020. [DOI: 10.1016/bs.adomc.2020.04.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Manßen M, Schafer LL. Titanium catalysis for the synthesis of fine chemicals – development and trends. Chem Soc Rev 2020; 49:6947-6994. [DOI: 10.1039/d0cs00229a] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Atlas as a Titan(ium) is holding the earth-abundant chemistry world. Titanium is the second most abundant transition metal, is a key player in important industrial processes (e.g. polyethylene) and shows much promise for diverse applications in the future.
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Affiliation(s)
- Manfred Manßen
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
| | - Laurel L. Schafer
- The Department of Chemistry
- The University of British Columbia
- Vancouver
- Canada
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6
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Bielefeld J, Kurochkina E, Schmidtmann M, Doye S. New Titanium Complexes and Their Use in Hydroamination and Hydroaminoalkylation Reactions. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900586] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jens Bielefeld
- Institut für Chemie Universität Oldenburg Carl‐von‐Ossietzky‐Straße 9‐11 26129 Oldenburg Germany
| | - Ekaterina Kurochkina
- Institut für Chemie Universität Oldenburg Carl‐von‐Ossietzky‐Straße 9‐11 26129 Oldenburg Germany
| | - Marc Schmidtmann
- Institut für Chemie Universität Oldenburg Carl‐von‐Ossietzky‐Straße 9‐11 26129 Oldenburg Germany
| | - Sven Doye
- Institut für Chemie Universität Oldenburg Carl‐von‐Ossietzky‐Straße 9‐11 26129 Oldenburg Germany
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7
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Perry MR, Gilmour DJ, Schafer LL. Mono, bis, and tris(phosphoramidate) titanium complexes: synthesis, structure, and reactivity investigations. Dalton Trans 2019; 48:9782-9790. [DOI: 10.1039/c9dt00911f] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of variously substituted phosphoramidate titanium complexes bearing dimethylamido ligands are reported.
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Affiliation(s)
- Mitchell R. Perry
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Damon J. Gilmour
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - Laurel L. Schafer
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
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8
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Gandeepan P, Müller T, Zell D, Cera G, Warratz S, Ackermann L. 3d Transition Metals for C-H Activation. Chem Rev 2018; 119:2192-2452. [PMID: 30480438 DOI: 10.1021/acs.chemrev.8b00507] [Citation(s) in RCA: 1402] [Impact Index Per Article: 233.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
C-H activation has surfaced as an increasingly powerful tool for molecular sciences, with notable applications to material sciences, crop protection, drug discovery, and pharmaceutical industries, among others. Despite major advances, the vast majority of these C-H functionalizations required precious 4d or 5d transition metal catalysts. Given the cost-effective and sustainable nature of earth-abundant first row transition metals, the development of less toxic, inexpensive 3d metal catalysts for C-H activation has gained considerable recent momentum as a significantly more environmentally-benign and economically-attractive alternative. Herein, we provide a comprehensive overview on first row transition metal catalysts for C-H activation until summer 2018.
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Affiliation(s)
- Parthasarathy Gandeepan
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Thomas Müller
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Daniel Zell
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Gianpiero Cera
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Svenja Warratz
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
| | - Lutz Ackermann
- Institut für Organische und Biomolekulare Chemie , Georg-August-Universität Göttingen , Tammannstraße 2 , 37077 Göttingen , Germany
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9
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Group 4 Complexes Bearing Pyrrolide Ligand for Intramolecular Alkene Hydroamination and Activation of C≡N Bond. Z Anorg Allg Chem 2018. [DOI: 10.1002/zaac.201800109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Guo J, Lu Y, Zhao R, Liu Z, Menberu W, Wang ZX. Strong Preference of the Redox-Neutral Mechanism over the Redox Mechanism for the Ti IV Catalysis Involved in the Carboamination of Alkyne with Alkene and Diazene. Chemistry 2018; 24:7010-7025. [PMID: 29709085 DOI: 10.1002/chem.201800339] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/01/2018] [Indexed: 02/01/2023]
Abstract
Titanium catalysis generally prefers redox-neutral mechanisms. Yet it has been reported that titanium could promote bond formations in a way similar to reductive elimination. Accordingly, redox catalytic cycles involving TiIV /TiII cycling have been considered. By studying, as an example, the carboamination of alkynes with alkenes and azobenzene catalyzed by the [TiIV ]=NPh imido complex, we performed DFT computations to gain an understanding of how the "abnormal" catalysis takes place, thereby allowing us to clarify whether the catalysis really follows TiIV /TiII redox mechanisms. The reaction first forms an azatitanacyclohexene by alkyne addition to the [TiIV ]=NPh bond, followed by alkene insertion. The azatitanacyclohexene can either undergo Cα -Cγ coupling, to afford bicyclo[3.1.0]imine, or β-H elimination, to yield a [TiIV ]-H hydride, which then undergoes Cα =Cβ or Cγ =Cδ insertion to give an α,β- or β,γ-unsaturated imine, respectively. Both the geometric and electronic structures indicate that the catalytic cycles proceed through redox-neutral mechanisms. The alternative redox mechanisms (e.g., by N-H or C-H reductive elimination) are substantially less favorable. We concluded that electronically, the TiIV catalysis intrinsically favors the redox-neutral mechanism, because a redox pathway would involve TiII structures either in the triplet ground state or in the high-lying open-shell singlet state, but the involvement of triplet TiII structures is spin-forbidden and that of singlet TiII structures is energetically disadvantageous.
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Affiliation(s)
- Jiandong Guo
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Yu Lu
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Ruihua Zhao
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Zheyuan Liu
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Wasihun Menberu
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhi-Xiang Wang
- School of Chemical Sciences, University of the Chinese Academy of Sciences, Beijing, 100049, China
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11
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Chen J, Goforth SK, McKeown BA, Gunnoe TB. Brønsted acid-catalysed intramolecular hydroamination of unactivated alkenes: metal triflates as an in situ source of triflic acid. Dalton Trans 2018; 46:2884-2891. [PMID: 28194456 DOI: 10.1039/c6dt04710f] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroamination of alkenes or alkynes is one of the most straightforward methods to form C-N bonds and nitrogen-containing heterocycles. A simple Lewis acid Al(OTf)3 was found to be an effective precatalyst for the hydroamination of unactivated primary and secondary alkenylamines between 110 and 150 °C. Subsequent studies show that other metal triflates are also effective precatalysts for the hydroamination reactions. For metal triflate salts, mechanistic studies, including kinetics, are consistent with the in situ generation of triflic acid, which likely serves as the active catalyst.
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Affiliation(s)
- Junqi Chen
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA.
| | - Sarah K Goforth
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA.
| | - Bradley A McKeown
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA.
| | - T Brent Gunnoe
- Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA.
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12
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Brandt JW, Chong E, Schafer LL. Ligand Effects and Kinetic Investigations of Sterically Accessible 2-Pyridonate Tantalum Complexes for Hydroaminoalkylation. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01486] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jason W. Brandt
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Eugene Chong
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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13
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Chirik PJ. Introduction to the Virtual Issue Honoring Robert Bergman’s 2017 Wolf Prize in Chemistry. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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14
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Guo J, Deng X, Song C, Lu Y, Qu S, Dang Y, Wang ZX. Differences between the elimination of early and late transition metals: DFT mechanistic insights into the titanium-catalyzed synthesis of pyrroles from alkynes and diazenes. Chem Sci 2016; 8:2413-2425. [PMID: 28451348 PMCID: PMC5369339 DOI: 10.1039/c6sc04456e] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/22/2016] [Indexed: 01/05/2023] Open
Abstract
Early transition metals (TMs), such as titanium, generally resist undergoing reductive elimination to form C-X bonds due to their weak electronegativity. By analyzing the mechanism of the titanium-catalyzed synthesis of pyrroles from alkynes and diazenes, the present study revealed that titanium is able to promote C-N bond formation via an unconventional elimination pathway, passing through a comparatively stable masked TiII complex (i.e., IM4) rather than pyrrole directly. The formation of IM4 originates from the bilateral donation and back-donation between Ti and the pyrrole ligand. Formally, it could be considered that the two electrons resulting from the unconventional reductive elimination are temporarily buffered by back-donation to a symmetry-allowed unoccupied π-orbital of the pyrrole ring in IM4 rather than becoming a lone pair on a Ti center as adopted in the catalysis of late TMs. Because of its stability, IM4 requires additional oxidation by diazene to liberate pyrrole. The triplet counterpart (IM4T ) of IM4 is more stable than IM4, but the elimination is unlikely to reach IM4T , because the process is spin-forbidden and the spin-orbit coupling is weak. Alternatively, one may consider the forming pyrrole in IM4 as a redox-active ligand, reserving the two electrons resulting from the formal reductive elimination and then releasing the electrons when IM4 is oxidized by diazene. These insights allow us to propose the conditions for early TMs to undergo a similar elimination, whereby the forming product will have symmetry-allowed frontier molecular orbitals to form donation and back-donation bonding with a TM center and a substrate possessing a comparatively strong oxidizing ability to oxidize an IM4-like intermediate for product release. These insights may provide another way of constructing C-X bonds through a similar reductive elimination pathway, using early TM catalysts.
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Affiliation(s)
- Jiandong Guo
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China .
| | - Xi Deng
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China .
| | - Chunyu Song
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China .
| | - Yu Lu
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China .
| | - Shuanglin Qu
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China .
| | - Yanfeng Dang
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China . .,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
| | - Zhi-Xiang Wang
- School of Chemistry and Chemical Engineering , University of the Chinese Academy of Sciences , Beijing 100049 , China . .,Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 300072 , China
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15
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Hafeez M, Riaz M. Aminopyridine stabilized group-IV metal complexes and their applications. APPLIED PETROCHEMICAL RESEARCH 2016. [DOI: 10.1007/s13203-016-0170-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Sachau SM, Zaheer M, Lale A, Friedrich M, Denner CE, Demirci UB, Bernard S, Motz G, Kempe R. Micro-/Mesoporous Platinum-SiCN Nanocomposite Catalysts (Pt@SiCN): From Design to Catalytic Applications. Chemistry 2016; 22:15508-15512. [DOI: 10.1002/chem.201603266] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2016] [Indexed: 11/09/2022]
Affiliation(s)
- Sabrina M. Sachau
- Lehrstuhl Anorganische Chemie II; Universität Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
| | - Muhammad Zaheer
- Department of Chemistry; SBA School of Science and Engineering; Lahore University of Management Sciences (LUMS); 54792 Lahore Pakistan
| | - Abhijeet Lale
- IEM (Institut Europeen des Membranes); UMR 5635 (CNRS-ENSCM-UM); Universite Montpellier; Place E. Bataillon 34095 Montpellier France
| | - Martin Friedrich
- Lehrstuhl Anorganische Chemie II; Universität Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
| | - Christine E. Denner
- Lehrstuhl Anorganische Chemie II; Universität Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
| | - Umit B. Demirci
- IEM (Institut Europeen des Membranes); UMR 5635 (CNRS-ENSCM-UM); Universite Montpellier; Place E. Bataillon 34095 Montpellier France
| | - Samuel Bernard
- IEM (Institut Europeen des Membranes); UMR 5635 (CNRS-ENSCM-UM); Universite Montpellier; Place E. Bataillon 34095 Montpellier France
| | - Günter Motz
- Lehrstuhl Keramische Werkstoffe; Universität Bayreuth; Ludwig-Thoma-Straße 36b 95447 Bayreuth Germany
| | - Rhett Kempe
- Lehrstuhl Anorganische Chemie II; Universität Bayreuth; Universitätsstrasse 30 95440 Bayreuth Germany
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Rodriguez-Ruiz V, Carlino R, Bezzenine-Lafollée S, Gil R, Prim D, Schulz E, Hannedouche J. Recent developments in alkene hydro-functionalisation promoted by homogeneous catalysts based on earth abundant elements: formation of C-N, C-O and C-P bond. Dalton Trans 2016; 44:12029-59. [PMID: 25803322 DOI: 10.1039/c5dt00280j] [Citation(s) in RCA: 106] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
This Perspective article provides an overview of the recent advancements in the field of intra- and inter-molecular C-N, C-O and C-P bond formation by hydroamination, hydroalkoxylation, hydrophosphination, hydrophosphonylation or hydrophosphinylation of unactivated alkenes, including allenes, 1,3-dienes and strained alkenes, promoted by (chiral) homogeneous catalysts based on earth abundant elements of the s and p blocks, the first row transition metals and the rare-earth metals. The relevant literature from 2009 until late 2014 has been covered.
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Bender CF, Brown TJ, Widenhoefer RA. Mechanism of the Platinum(II)-Catalyzed Hydroamination of 4-Pentenylamines. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00821] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christopher F. Bender
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
| | - Timothy J. Brown
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
| | - Ross A. Widenhoefer
- Department of Chemistry,
French Family Science Center, Duke University, Durham, North Carolina 27708-0346, United States
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20
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Cimino A, Moscatelli F, Ferretti F, Ragaini F, Germain S, Hannedouche J, Schulz E, Luconi L, Rossin A, Giambastiani G. Novel yttrium and zirconium catalysts featuring reduced Ar-BIANH2 ligands for olefin hydroamination (Ar-BIANH2 = bis-arylaminoacenaphthylene). NEW J CHEM 2016. [DOI: 10.1039/c6nj02199a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Even demanding aminoalkenes can be cyclized by Ar-BIANH2 yttrium complexes; a related zirconium complex has been crystallographically characterized.
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Affiliation(s)
- Alessandro Cimino
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Filippo Moscatelli
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Francesco Ferretti
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Fabio Ragaini
- Dipartimento di Chimica
- Università degli Studi di Milano
- 20133 Milano
- Italy
| | - Stéphane Germain
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Jérôme Hannedouche
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Emmanuelle Schulz
- Institut de Chimie Moléculaire et des Matériaux d'Orsay
- UMR CNRS 8182
- Université Paris-Sud
- Orsay Cedex
- France
| | - Lapo Luconi
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Andrea Rossin
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
| | - Giuliano Giambastiani
- Institute of Chemistry of Organometallic Compounds ICCOM-CNR and Consorzio INSTM
- 50019 Sesto F.no Florence
- Italy
- Kazan Federal University
- 420008 Kazan
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21
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Zhang Y, Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Intramolecular hydroamination reactions catalyzed by zirconium complexes bearing bridged bis(phenolato) ligands. RSC Adv 2016. [DOI: 10.1039/c5ra23270h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Cationic species derived from zirconium complexes stabilized by bridged bis(phenolato) ligands showed good activities in catalyzing intramolecular hydroamination/cyclization of primary and secondary amines.
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Affiliation(s)
- Yu Zhang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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22
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Fehn S, Zaheer M, Denner CE, Friedrich M, Kempe R. Robustly supported rhodium nanoclusters: synthesis and application in selective hydrogenation of lignin derived phenolic compounds. NEW J CHEM 2016. [DOI: 10.1039/c6nj01974a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rh@SiCN catalysts synthesized using a one-pot process afford selective hydrogenation of phenolic compounds.
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Affiliation(s)
- Sonja Fehn
- Inorganic Chemistry II
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Muhammad Zaheer
- Department of Chemistry
- SBA School of Science and Engineering
- Lahore University of Management Sciences (LUMS)
- 54792 Lahore
- Pakistan
| | | | - Martin Friedrich
- Inorganic Chemistry II
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Rhett Kempe
- Inorganic Chemistry II
- University of Bayreuth
- 95440 Bayreuth
- Germany
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23
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Kaga A, Peng X, Hirao H, Chiba S. Diastereo‐Divergent Synthesis of Saturated Azaheterocycles Enabled by
t
BuOK‐Mediated Hydroamination of Alkenyl Hydrazones. Chemistry 2015; 21:19112-8. [DOI: 10.1002/chem.201504160] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2015] [Indexed: 01/26/2023]
Affiliation(s)
- Atsushi Kaga
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Xingao Peng
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Hajime Hirao
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
| | - Shunsuke Chiba
- Division of Chemistry and Biological Chemistry, School of Physical and Mathematical Sciences, Nanyang Technological University, Singapore 637371 (Singapore)
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24
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Ryken SA, Schafer LL. N,O-Chelating Four-Membered Metallacyclic Titanium(IV) Complexes for Atom-Economic Catalytic Reactions. Acc Chem Res 2015; 48:2576-86. [PMID: 26247696 DOI: 10.1021/acs.accounts.5b00224] [Citation(s) in RCA: 96] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Titanium, as the second most abundant transition metal in the earth's crust, lends itself as a sustainable and inexpensive resource in catalysis. Its nontoxicity and biocompatibility are also attractive features for handling and disposal. Titanium has excelled as a catalyst for a broad range of transformations, including ethylene and α-olefin polymerizations. However, many reactions relevant to fine chemical synthesis have preferrentially employed late transition metals, and reactive, inexpensive early transition metals have been largely overlooked. In addition to promising reactivity, titanium complexes feature more robust character compared with some other highly Lewis-acidic metals such as those found in the lanthanide series. Since the advent of modulating ligand scaffolds, titanium has found use in a growing variety of reactions as a versatile homogeneous catalyst. These catalytic transformations include hydrofunctionalization reactions (adding an element-hydrogen (E-H) bond across a C-C multiple bond), as well as the ring-opening polymerization of cyclic esters, all of which are atom-economic transformations. Our investigations have focused on tight bite angle monoanionic N,O-chelating ligands, forming four-membered metallacycles. These ligand sets, including amidates, ureates, pyridonates, and sulfonamidates, have flexible binding modes offering a range of stable and reactive intermediates necessary for catalytic activity. Additionally, the simple form of these ligands leads to easily prepared proligands, along with facile tuning of steric and electronic factors. A sterically bulky titanium amidate complex has proven to be a leading catalyst for the selective formation of anti-Markovnikov addition products via intermolecular hydroamination of terminal alkynes, while sterically less demanding titanium pyridonates have opened the path to the selective formation of amine substituted cycloalkanes via the intramolecular hydroaminoalkylation of aminoalkenes over the competing hydroamination pathway. Sulfonamidates have boosted reactivity for hydrofunctionalization and polymerization reactions compared with amide ligands not bearing a sulfonyl group. N,O-Chelated titanium complexes have been used to synthesize ultrahigh molecular weight polyethylene and have been utilized in the challenging task of realizing equal incorporation of two different cyclic esters in a random ring-opening copolymerization. These discrete complexes have allowed for careful study of fundamental coordination chemistry and stoichiometric organometallic investigations. With inexpensive starting materials and modular ligands, titanium N,O-chelated complexes are well-suited to address the challenges of achieving greener chemical processes while accessing useful reaction manifolds for sustainable synthesis.
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Affiliation(s)
- Scott A. Ryken
- Department of Chemistry, University of British Columbia, 2036
Main Mall, Vancouver, British
Columbia V6T 1Z1, Canada
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036
Main Mall, Vancouver, British
Columbia V6T 1Z1, Canada
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25
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Lühning LH, Brahms C, Nimoth JP, Schmidtmann M, Doye S. A NewN-Trityl-Substituted Aminopyridinato Titanium Catalyst for Hydroamination and Hydroaminoalkylation Reactions - Unexpected Intramolecular C-H Bond Activation. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500542] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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26
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Tobisch S. Aluminium-catalysed intramolecular hydroamination of aminoalkenes: computational perusal of alternative pathways for aminoalkene activation. Dalton Trans 2015; 44:12169-79. [PMID: 25801632 DOI: 10.1039/c5dt00121h] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A comprehensive computational examination of alternatively plausible mechanistic pathways for the intramolecular hydroamination (HA) of aminoalkenes utilising a recently reported novel phenylene-diamine aluminium amido compound is presented. On the one hand, a proton-assisted concerted N-C/C-H bond-forming pathway to afford the cycloamine in a single step can be invoked, and, on the other, a stepwise σ-insertive pathway that involves a relatively fast, reversible migratory olefin 1,2-insertion step linked to a less rapid, irreversible Al-C alkyl bond protonolysis. The present study, which employs a sophisticated and reliable computational methodology, supports the prevailing mechanism to be a stepwise σ-insertive pathway. The predicted effective barrier for turnover-limiting aminolysis compares favourably with reported catalytic performance data. Non-competitive kinetic demands militates against the operation of the concerted proton-assisted pathway, which describes N-C bond-forming ring closure triggered by concomitant amino proton delivery at the C[double bond, length as m-dash]C linkage evolving through a six-centre transition state structure. The valuable insights into mechanistic intricacies of aluminium-mediated intramolecular HA reported herein will help guide the rational design of group 13 metal-based HA catalysts.
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Affiliation(s)
- Sven Tobisch
- School of Chemistry, University of St Andrews, Purdie Building, North Haugh, St Andrews, UK KY16 9ST.
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27
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Pedrosa S, Vidal F, Lee LM, Vargas-Baca I, Gómez-Sal P, Mosquera MEG. Imido-pyridine Ti(IV) compounds: synthesis of unusual imido-amido heterobimetallic derivatives. Dalton Trans 2015; 44:11119-28. [PMID: 25997565 DOI: 10.1039/c5dt01320h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of lithiated picolines and [TiCl3(η(5)-C5Me5)] leads to several bridging or terminal imido compounds, each of which can be selectively formed by controlling the stoichiometry and temperature. Specifically, the dinuclear imido-bridged [TiCl(η(5)-C5Me5)(μ-NR)]2 (1a, NR = 2-imido-3-picoline; 1b, NR = 2-imido-5-picoline) species and the unusual Ti-Li imido-amido heterobimetallic complex [{Li(THF)}{Ti(η(5)-C5Me5)(NR)(NHR)2}] (2a, NR = 2-imido-3-picoline; 2b, NR = 2-imido-5-picoline) were isolated. Compounds 2 are in effect the first structurally characterized examples of titanium(IV) coordinated to terminal imido-pyridines. DFT-D calculations for 2a denote a multiple bond character between titanium and the imido ligand and a strong polarization of the electron density by the alkali cation in spite of the lack of intermetallic bonding.
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Affiliation(s)
- Sergio Pedrosa
- Departamento de Química Orgánica y Química Inorgánica, Universidad de Alcalá, Campus Universitario, E-28871 Alcalá de Henares, Spain.
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28
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Coman SM, Parvulescu VI. Nonprecious Metals Catalyzing Hydroamination and C–N Coupling Reactions. Org Process Res Dev 2015. [DOI: 10.1021/acs.oprd.5b00010] [Citation(s) in RCA: 79] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Simona M. Coman
- Department of Organic Chemistry,
Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Bdul Regina Elisabeta 4-12, Bucharest 030016, Romania
| | - Vasile I. Parvulescu
- Department of Organic Chemistry,
Biochemistry and Catalysis, Faculty of Chemistry, University of Bucharest, Bdul Regina Elisabeta 4-12, Bucharest 030016, Romania
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29
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Zhang X, Tobisch S, Hultzsch KC. σ-Insertive Mechanism versus Concerted Non-insertive Mechanism in the Intramolecular Hydroamination of Aminoalkenes Catalyzed by Phenoxyamine Magnesium Complexes: A Synthetic and Computational Study. Chemistry 2015; 21:7841-57. [DOI: 10.1002/chem.201406468] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2014] [Revised: 03/09/2015] [Indexed: 11/08/2022]
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30
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Drover MW, Schafer LL, Love JA. Amidate-Ligated Complexes of Rhodium(I): A Showcase of Coordination Flexibility. Organometallics 2015. [DOI: 10.1021/om501209c] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
- Marcus W. Drover
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Laurel L. Schafer
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Jennifer A. Love
- Department of Chemistry, The University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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31
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Noor A, Schwarz S, Kempe R. Low-Valent Aminopyridinato Chromium Methyl Complexes via Reductive Alkylation and via Oxidative Addition of Iodomethane by a Cr–Cr Quintuple Bond. Organometallics 2015. [DOI: 10.1021/om501230g] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Awal Noor
- Lehrstuhl für Anorganische
Chemie II (Catalyst Design), Universität Bayreuth, 95440 Bayreuth, Germany
| | - Stefan Schwarz
- Lehrstuhl für Anorganische
Chemie II (Catalyst Design), Universität Bayreuth, 95440 Bayreuth, Germany
| | - Rhett Kempe
- Lehrstuhl für Anorganische
Chemie II (Catalyst Design), Universität Bayreuth, 95440 Bayreuth, Germany
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32
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Chirik PJ. Editorial: A New Look, Some New Faces, and Continuing the Tradition of Excellence. Organometallics 2015. [DOI: 10.1021/om5012984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Paul J. Chirik
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
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33
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Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Zirconium catalysed intermolecular hydroamination reactions of secondary amines with alkynes. Chem Commun (Camb) 2015; 51:7633-6. [DOI: 10.1039/c5cc01780g] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The first example of group 4 metal catalysts capable of mediating intermolecular hydroamination reactions of secondary aromatic amines is reported.
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Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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34
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Sun Q, Wang Y, Yuan D, Yao Y, Shen Q. Zirconium complexes stabilized by amine-bridged bis(phenolato) ligands as precatalysts for intermolecular hydroamination reactions. Dalton Trans 2015; 44:20352-60. [DOI: 10.1039/c5dt02643a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Pentacoordinate zirconium complexes 5 and 7 stabilized by amine-bridged bis(phenolato) ligands are more active than hexacoordinate complexes 1–4 in catalyzing intermolecular hydroamination reactions.
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Affiliation(s)
- Qiu Sun
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yaorong Wang
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Dan Yuan
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Yingming Yao
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
| | - Qi Shen
- Key Laboratory of Organic Synthesis of Jiangsu Province
- College of Chemistry
- Chemical Engineering and Materials Science
- Dushu Lake Campus
- Soochow University
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35
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Yonson N, Yim JCH, Schafer LL. Alkene hydroamination with a chiral zirconium catalyst. Connecting ligand design, precatalyst structure and reactivity trends. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.07.073] [Citation(s) in RCA: 9] [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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36
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Shigehisa H, Koseki N, Shimizu N, Fujisawa M, Niitsu M, Hiroya K. Catalytic Hydroamination of Unactivated Olefins Using a Co Catalyst for Complex Molecule Synthesis. J Am Chem Soc 2014; 136:13534-7. [DOI: 10.1021/ja507295u] [Citation(s) in RCA: 111] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Hiroki Shigehisa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Natsumi Koseki
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Nao Shimizu
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Mayu Fujisawa
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Makoto Niitsu
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
| | - Kou Hiroya
- Faculty of Pharmacy, Musashino University, 1-1-20 Shinmachi
Nishitokyo-shi, Tokyo 202-8585, Japan
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37
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Metal and halogen dependence of the rate effect in hydroamination/cyclization of unactivated aminoalkenes: Synthesis, characterization, and catalytic rates of CCC-NHC hafnium and zirconium pincer complexes. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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38
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Bendjeriou-Sedjerari A, Azzi JM, Abou-Hamad E, Anjum DH, Pasha FA, Huang KW, Emsley L, Basset JM. Bipodal Surface Organometallic Complexes with Surface N-Donor Ligands and Application to the Catalytic Cleavage of C–H and C–C Bonds in n-Butane. J Am Chem Soc 2013; 135:17943-51. [DOI: 10.1021/ja407902g] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Anissa Bendjeriou-Sedjerari
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Joachim M. Azzi
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Edy Abou-Hamad
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Dalaver H. Anjum
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Fahran A. Pasha
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Kuo-Wei Huang
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
| | - Lyndon Emsley
- Université de Lyon, Institut de Sciences Analytiques
(CNRS, ENS-Lyon, UCB Lyon 1), Centre de RMN à Très Hauts
Champs, 5 rue de la Doua, 69100 Villeurbanne, France
| | - Jean-Marie Basset
- KAUST Catalysis Center (KCC), King Abdullah University of Science & Technology, 23955-6900 Thuwal, Saudi Arabia
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39
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Chong E, Schafer LL. 2-Pyridonate titanium complexes for chemoselectivity. Accessing intramolecular hydroaminoalkylation over hydroamination. Org Lett 2013; 15:6002-5. [PMID: 24224611 DOI: 10.1021/ol402890m] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Chemoselectivity of intramolecular hydroaminoalkylation over hydroamination has been achieved with a bis(3-phenyl-2-pyridonate) titanium complex. Primary aminoalkenes are selectively α-alkylated by C-H functionalization adjacent to nitrogen to access five- and six-membered cycloalkylamines with a good substrate-dependent diastereoselectivity of up to 19:1.
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Affiliation(s)
- Eugene Chong
- Department of Chemistry, University of British Columbia , 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
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40
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Mukherjee A, Sen TK, Ghorai PK, Mandal SK. Organozinc Catalyst on a Phenalenyl Scaffold for Intramolecular Hydroamination of Aminoalkenes. Organometallics 2013. [DOI: 10.1021/om400906u] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Arup Mukherjee
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Tamal K. Sen
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Pradip Kr. Ghorai
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
| | - Swadhin K. Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research-Kolkata, Mohanpur 741252, Nadia, West Bengal, India
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41
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Brahms C, Tholen P, Saak W, Doye S. An (Aminopyrimidinato)titanium Catalyst for the Hydroamination of Alkynes and Alkenes. European J Org Chem 2013. [DOI: 10.1002/ejoc.201301004] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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42
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Garcia P, Payne PR, Chong E, Webster RL, Barron BJ, Behrle AC, Schmidt JA, Schafer LL. Easily assembled, modular N,O-chelating ligands for Ta(V) complexation: a comparative study of ligand effects in hydroaminoalkylation with N-methylaniline and 4-methoxy-N-methylaniline. Tetrahedron 2013. [DOI: 10.1016/j.tet.2013.04.070] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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