1
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Notz S, Scharf S, Lang H. Jumping in the Chiral Pool: Asymmetric Hydroaminations with Early Metals. Molecules 2023; 28:molecules28062702. [PMID: 36985673 PMCID: PMC10058505 DOI: 10.3390/molecules28062702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2023] [Revised: 03/03/2023] [Accepted: 03/06/2023] [Indexed: 03/19/2023] Open
Abstract
The application of early-metal-based catalysts featuring natural chiral pool motifs, such as amino acids, terpenes and alkaloids, in hydroamination reactions is discussed and compared to those beyond the chiral pool. In particular, alkaline (Li), alkaline earth (Mg, Ca), rare earth (Y, La, Nd, Sm, Lu), group IV (Ti, Zr, Hf) metal-, and tantalum-based catalytic systems are described, which in recent years improved considerably and have become more practical in their usability. Additional emphasis is directed towards their catalytic performance including yields and regio- as well as stereoselectivity in comparison with the group IV and V transition metals and more widely used rare earth metal-based catalysts.
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2
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Early transition metal complexes for direct C H bond functionalization of heteroatom-containing organic compounds. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2022.214810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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3
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Griffin SE, Adamczyk OV, Schafer LL. Vanadium pyridonates: dimerization, redox behaviour, and metal-ligand cooperativity. Dalton Trans 2022; 51:14654-14663. [PMID: 36093858 DOI: 10.1039/d2dt02177c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The synthesis, structure, and reactivity of vanadium pyridonate complexes are described. Vanadium(III) pyridonate complexes were accessed through protonolysis and reduction of a tetrakis(amido)vanadium(IV) starting material. Bis(pyridonate) vanadium(IV) precursors could be isolated depending on the amount of proteoligand added. The targeted vanadium(III) species tend to form dimers, but monomeric complexes can be achieved in the presence of neutral donors such as amines or pyridine derivatives or through the use of sterically demanding proligands. The reduction process is proposed to involve dimeric intermediates and be mediated by the amine released from protonolysis, thereby forming the corresponding imine as a byproduct. Isolated amine complexes of vanadium(III) are presented. In contrast, bis(amidate)vanadium(IV) complexes were not found to undergo a similar reduction. This work informs on design principles for the synthesis and application of new vanadium pyridonate catalysts for transformations involving dimerization and PCET for changes in oxidation state.
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Affiliation(s)
- Samuel E Griffin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
| | - Olivia V Adamczyk
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada, V6T 1Z1.
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4
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DiPucchio RC, Rosca SC, Schafer LL. Hydroaminoalkylation for the Catalytic Addition of Amines to Alkenes or Alkynes: Diverse Mechanisms Enable Diverse Substrate Scope. J Am Chem Soc 2022; 144:11459-11481. [PMID: 35731810 DOI: 10.1021/jacs.1c10397] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Hydroaminoalkylation is a powerful, atom-economic catalytic reaction for the reaction of amines with alkenes and alkynes. This C-H functionalization reaction allows for the atom-economic alkylation of amines using simple alkenes or alkynes as the alkylating agents. This transformation has significant potential for transformative approaches in the pharmaceutical, agrochemical, and fine chemical industries in the preparation of selectively substituted amines and N-heterocycles and shows promise in materials science for the synthesis of functional and responsive aminated materials. Different early transition-metal, late transition-metal, and photoredox catalysts mediate hydroaminoalkylation by distinct mechanistic pathways. These mechanistic insights have resulted in the development of new catalysts and reaction conditions to realize hydroaminoalkylation with a broad range of substrates: activated and unactivated, terminal and internal, C-C double and triple bonds with aryl or alkyl primary, secondary, or tertiary amines, including N-heterocyclic amines. By deploying select catalysts with specific substrate combinations, control over regioselectivity, diastereoselectivity, and enantioselectivity has been realized. Key barriers to widespread adoption of this reaction include air and moisture sensitivity for early transition-metal catalysts as well as a heavy dependence on amine protecting or directing groups for late transition-metal or photocatalytic routes. Advances in improved catalyst robustness, substrate scope, and regio-/stereoselective reactions with early- and late transition-metal catalysts, as well as photoredox catalysis, are highlighted, and opportunities for further catalyst and reaction development are included. This perspective shows that hydroaminoalkylation has the potential to be a disruptive and transformative strategy for the synthesis of selectively substituted amines and N-heterocycles from simple amines and alkenes.
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Affiliation(s)
- Rebecca C DiPucchio
- Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada, V6T 1Z1
| | - Sorin-Claudiu Rosca
- Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada, V6T 1Z1
| | - Laurel L Schafer
- Department of Chemistry, The University of British Columbia, Vancouver, BC, Canada, V6T 1Z1
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5
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Saadati F, Griffin SE, Schafer LL. Guanidinate Early-Transition-Metal Complexes: Efficient and Selective Hydroaminoalkylation of Alkenes. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00043] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fariba Saadati
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
- Department of Chemistry, Faculty of Science, University of Zanjan, P.O. Box 45371-38791, Zanjan M9PX+FX7, Iran
| | - Samuel E. Griffin
- 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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6
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Petrov PA, Rogachev AV, El’tsov IV, Sukhikh TS, Laricheva YA, Abramov PA, Sokolov MN. Cyclometallation of the Dimethylamide Ligand in the Reaction of Ta(NMe2)5 with CS2. RUSS J COORD CHEM+ 2021. [DOI: 10.1134/s1070328421100055] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Wu X, Ren J, Shao Z, Yang X, Qian D. Transition-Metal-Catalyzed Asymmetric Couplings of α-Aminoalkyl Fragments to Access Chiral Alkylamines. ACS Catal 2021. [DOI: 10.1021/acscatal.1c01545] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Xiaomei Wu
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province; Yunnan Provincial Center for Research & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Jiangtao Ren
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province; Yunnan Provincial Center for Research & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Zhihui Shao
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province; Yunnan Provincial Center for Research & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Xiaodong Yang
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province; Yunnan Provincial Center for Research & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
| | - Deyun Qian
- Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province; Yunnan Provincial Center for Research & Development of Natural Products; School of Chemical Science and Technology, Yunnan University, Kunming 650091, People’s Republic of China
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8
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Daneshmand P, Roşca SC, Dalhoff R, Yin K, DiPucchio RC, Ivanovich RA, Polat DE, Beauchemin AM, Schafer LL. Cyclic Ureate Tantalum Catalyst for Preferential Hydroaminoalkylation with Aliphatic Amines: Mechanistic Insights into Substrate Controlled Reactivity. J Am Chem Soc 2020; 142:15740-15750. [PMID: 32786765 DOI: 10.1021/jacs.0c04579] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The efficient and catalytic amination of unactivated alkenes with simple secondary alkyl amines is preferentially achieved. A sterically accessible, N,O-chelated cyclic ureate tantalum catalyst was prepared and characterized by X-ray crystallography. This optimized catalyst can be used for the hydroaminoalkylation of 1-octene with a variety of aryl and alkyl amines, but notably enhanced catalytic activity can be realized with challenging N-alkyl secondary amine substrates. This catalyst offers turnover frequencies of up to 60 h-1, affording full conversion at 5 mol% catalyst loading in approximately 20 min with these nucleophilic amines. Mechanistic investigations, including kinetic isotope effect (KIE) studies, reveal that catalytic turnover is limited by protonolysis of the intermediate 5-membered azametallacycle. A Hammett kinetic analysis shows that catalytic turnover is promoted by electron rich amine substrates that enable catalytic turnover. This more active catalyst is shown to be effective for late stage drug modification.
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Affiliation(s)
- Pargol Daneshmand
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Sorin-Claudiu Roşca
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rosalie Dalhoff
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Kejun Yin
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Rebecca C DiPucchio
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Ryan A Ivanovich
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - Dilan E Polat
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - André M Beauchemin
- Centre for Catalysis Research and Innovation, Department of Chemistry and Biomolecular Sciences, University of Ottawa, 10 Marie-Curie, Ottawa, ON K1N 6N5, Canada
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
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9
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Braun C, Nieger M, Bräse S, Schafer LL. Planar‐Chiral [2.2]Paracyclophane‐Based Pyridonates as Ligands for Tantalum‐Catalyzed Hydroaminoalkylation. ChemCatChem 2019. [DOI: 10.1002/cctc.201900416] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Carolin Braun
- Institute of Organic ChemistryKarlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Department of ChemistryUniversity of British Columbia 2036 Main Mall Vancouver, BC V6T 1Z1 Canada
| | - Martin Nieger
- Department of ChemistryUniversity of Helsinki P.O. Box 55 00014 University of Helsinki Finland
| | - Stefan Bräse
- Institute of Organic ChemistryKarlsruhe Institute of Technology (KIT) Fritz-Haber-Weg 6 76131 Karlsruhe Germany
- Institute of Toxicology and GeneticsKarlsruhe Institute of Technology (KIT) Hermann-von-Helmholtz-Platz 1 76344 Eggenstein-Leopoldshafen Germany
| | - Laurel L. Schafer
- Department of ChemistryUniversity of British Columbia 2036 Main Mall Vancouver, BC V6T 1Z1 Canada
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10
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Gilmour DJ, Lauzon JMP, Clot E, Schafer LL. Ta-Catalyzed Hydroaminoalkylation of Alkenes: Insights into Ligand-Modified Reactivity Using DFT. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00674] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Damon J. Gilmour
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Jean Michel P. Lauzon
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
| | - Eric Clot
- Institut Charles Gerhardt, UMR 5253 CNRS-UM-ENSCM, Université de Montpellier, Place Eugène Bataillon, 34090 Montpellier, France
| | - Laurel L. Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada
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11
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Hannedouche J, Schulz E. Hydroamination and Hydroaminoalkylation of Alkenes by Group 3–5 Elements: Recent Developments and Comparison with Late Transition Metals. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00431] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Jérôme Hannedouche
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
| | - Emmanuelle Schulz
- Institut de Chimie Moléculaire et des Matériaux d’Orsay, CNRS UMR 8182, Université Paris-Sud, Université Paris-Saclay, Bâtiment 420, 91405 Orsay, France
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12
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Shirai T, Okamoto T, Yamamoto Y. Iridium-Catalyzed Direct Asymmetric Alkylation of Aniline Derivatives using 2-Norbornene. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800185] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Tomohiko Shirai
- Department of Materials Science and Engineering; National Institute of Technology; Kochi College; Otsu Monobe Nankoku Kochi 783-8508 Japan
| | - Takakazu Okamoto
- Department of Materials Science and Engineering; National Institute of Technology; Kochi College; Otsu Monobe Nankoku Kochi 783-8508 Japan
| | - Yasunori Yamamoto
- Division of Chemical Process Engineering and Frontier Chemistry Center (FCC); Faculty of Engineering; Hokkaido University; Kita 13 Nishi 8 Kita-ku Sapporo Hokkaido 060-8628 Japan
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13
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Al‐Shboul TMA, Ziemann S, Görls H, Jazzazi TMA, Krieck S, Westerhausen M. Synthesis of Dipotassium 2,2′‐Bis(2‐oxidobenzylideneamino)‐4,4′‐dimethyl‐1,1′‐biphenyl Derivatives and Use as Ligand Transfer Reagent. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
| | - Steffen Ziemann
- Friedrich Schiller University Jena (FSU) Institute of Inorganic and Analytical Chemistry Humboldtstraße 8 07743 Jena Germany
| | - Helmar Görls
- Friedrich Schiller University Jena (FSU) Institute of Inorganic and Analytical Chemistry Humboldtstraße 8 07743 Jena Germany
| | | | - Sven Krieck
- Friedrich Schiller University Jena (FSU) Institute of Inorganic and Analytical Chemistry Humboldtstraße 8 07743 Jena Germany
| | - Matthias Westerhausen
- Friedrich Schiller University Jena (FSU) Institute of Inorganic and Analytical Chemistry Humboldtstraße 8 07743 Jena Germany
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14
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Bresciani G, Bortoluzzi M, Zacchini S, Marchetti F, Pampaloni G. Structural Characterization of a Fluorido‐Amide of Niobium, and Facile CO
2
Incorporation Affording a Fluorido‐Carbamate. Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701309] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Giulio Bresciani
- University of Pisa Dipartimento di Chimica e Chimica Industriale Via G. Moruzzi 13 56124 Pisa Italy
- CIRCC Via Celso Ulpiani 27 70126 Bari Italy
| | - Marco Bortoluzzi
- CIRCC Via Celso Ulpiani 27 70126 Bari Italy
- Ca' Foscari University of Venezia Dipartimento di Scienze Molecolari e Nanosistemi Via Torino 155 30170 Mestre (VE) Italy
| | - Stefano Zacchini
- CIRCC Via Celso Ulpiani 27 70126 Bari Italy
- University of Bologna Dipartimento di Chimica Industriale “Toso Montanari” Viale Risorgimento 4 40136 Bologna Italy
| | - Fabio Marchetti
- University of Pisa Dipartimento di Chimica e Chimica Industriale Via G. Moruzzi 13 56124 Pisa Italy
- CIRCC Via Celso Ulpiani 27 70126 Bari Italy
| | - Guido Pampaloni
- University of Pisa Dipartimento di Chimica e Chimica Industriale Via G. Moruzzi 13 56124 Pisa Italy
- CIRCC Via Celso Ulpiani 27 70126 Bari Italy
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15
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DiPucchio RC, Roşca SC, Schafer LL. Catalytic and Atom-Economic Csp3 -Csp3 Bond Formation: Alkyl Tantalum Ureates for Hydroaminoalkylation. Angew Chem Int Ed Engl 2018; 57:3469-3472. [PMID: 29330909 DOI: 10.1002/anie.201712668] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2017] [Indexed: 01/25/2023]
Abstract
Atom-economic and regioselective Csp3 -Csp3 bond formation has been achieved by rapid C-H alkylation of unprotected secondary arylamines with unactivated alkenes. The combination of Ta(CH2 SiMe3 )3 Cl2 , and a ureate N,O-chelating-ligand salt gives catalytic systems prepared in situ that can realize high yields of β-alkylated aniline derivatives from either terminal or internal alkene substrates. These new catalyst systems realize C-H alkylation in as little as one hour and for the first time a 1:1 stoichiometry of alkene and amine substrates results in high yielding syntheses of isolated amine products by simple filtration and concentration.
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Affiliation(s)
- Rebecca C DiPucchio
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, B.C, V6T 1Z1, Canada
| | - Sorin-Claudiu Roşca
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, B.C, V6T 1Z1, Canada
| | - Laurel L Schafer
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, B.C, V6T 1Z1, Canada
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16
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DiPucchio RC, Roşca SC, Schafer LL. Catalytic and Atom-Economic Csp3
−Csp3
Bond Formation: Alkyl Tantalum Ureates for Hydroaminoalkylation. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201712668] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Rebecca C. DiPucchio
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver B.C V6T 1Z1 Canada
| | - Sorin-Claudiu Roşca
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver B.C V6T 1Z1 Canada
| | - Laurel L. Schafer
- Department of Chemistry; University of British Columbia; 2036 Main Mall Vancouver B.C V6T 1Z1 Canada
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17
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Edwards PM, Schafer LL. Early transition metal-catalyzed C–H alkylation: hydroaminoalkylation for Csp3–Csp3 bond formation in the synthesis of selectively substituted amines. Chem Commun (Camb) 2018; 54:12543-12560. [DOI: 10.1039/c8cc06445h] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Protecting group, directing group, and external oxidant free synthesis of structurally diverse amines.
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Affiliation(s)
- P. M. Edwards
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
| | - L. L. Schafer
- Department of Chemistry
- University of British Columbia
- Vancouver
- Canada
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18
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Torigoe T, Ohmura T, Suginome M. Asymmetric Cycloisomerization of o
-Alkenyl-N
-Methylanilines to Indolines by Iridium-Catalyzed C(sp3
)−H Addition to Carbon-Carbon Double Bonds. Angew Chem Int Ed Engl 2017; 56:14272-14276. [DOI: 10.1002/anie.201708578] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2017] [Revised: 09/22/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Takeru Torigoe
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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19
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Torigoe T, Ohmura T, Suginome M. Asymmetric Cycloisomerization of o
-Alkenyl-N
-Methylanilines to Indolines by Iridium-Catalyzed C(sp3
)−H Addition to Carbon-Carbon Double Bonds. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201708578] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Takeru Torigoe
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Toshimichi Ohmura
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
| | - Michinori Suginome
- Department of Synthetic Chemistry and Biological Chemistry; Graduate School of Engineering; Kyoto University; Katsura, Nishikyo-ku Kyoto 615-8510 Japan
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20
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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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21
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Lauzon JM, Eisenberger P, Roşca SC, Schafer LL. Amidate Complexes of Tantalum and Niobium for the Hydroaminoalkylation of Unactivated Alkenes. ACS Catal 2017. [DOI: 10.1021/acscatal.7b01293] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jean Michel Lauzon
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Patrick Eisenberger
- Department of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia, Canada V6T 1Z1
| | - Sorin-Claudiu Roşca
- 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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22
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Luo Y, Teng HL, Nishiura M, Hou Z. Asymmetric Yttrium-Catalyzed C(sp3)−H Addition of 2-Methyl Azaarenes to Cyclopropenes. Angew Chem Int Ed Engl 2017; 56:9207-9210. [DOI: 10.1002/anie.201705431] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Yong Luo
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Huai-Long Teng
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
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23
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Luo Y, Teng HL, Nishiura M, Hou Z. Asymmetric Yttrium-Catalyzed C(sp3)−H Addition of 2-Methyl Azaarenes to Cyclopropenes. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201705431] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yong Luo
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Huai-Long Teng
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Masayoshi Nishiura
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
| | - Zhaomin Hou
- Organometallic Chemistry Laboratory; RIKEN; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
- Advanced Catalysis Research Group; RIKEN Center for Sustainable Resource Science; 2-1 Hirosawa, Wako Saitama 351-0198 Japan
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24
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Zhang L, Zhang C, Hou G, Zi G, Walter MD. Small-Molecule Activation Mediated by a Uranium Bipyridyl Metallocene. Organometallics 2017. [DOI: 10.1021/acs.organomet.7b00064] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Lei Zhang
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Congcong Zhang
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guohua Hou
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Guofu Zi
- Department
of Chemistry, Beijing Normal University, Beijing 100875, China
| | - Marc D. Walter
- Institut
für Anorganische und Analytische Chemie, Technische Universität Braunschweig, Hagenring 30, 38106 Braunschweig, Germany
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25
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Newton CG, Wang SG, Oliveira CC, Cramer N. Catalytic Enantioselective Transformations Involving C–H Bond Cleavage by Transition-Metal Complexes. Chem Rev 2017; 117:8908-8976. [DOI: 10.1021/acs.chemrev.6b00692] [Citation(s) in RCA: 643] [Impact Index Per Article: 91.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Christopher G. Newton
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Shou-Guo Wang
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Caio C. Oliveira
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Nicolai Cramer
- Laboratory of Asymmetric
Catalysis and Synthesis, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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26
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Dong Z, Ren Z, Thompson SJ, Xu Y, Dong G. Transition-Metal-Catalyzed C–H Alkylation Using Alkenes. Chem Rev 2017; 117:9333-9403. [DOI: 10.1021/acs.chemrev.6b00574] [Citation(s) in RCA: 725] [Impact Index Per Article: 103.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Zhe Dong
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Zhi Ren
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Samuel J. Thompson
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Yan Xu
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
| | - Guangbin Dong
- Department
of Chemistry, University of Chicago, Chicago, Illinois 60637, United States
- Department
of Chemistry, University of Texas at Austin, Austin, Texas 78712, United States
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27
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Helgert TR, Zhang X, Box HK, Denny JA, Valle HU, Oliver AG, Akurathi G, Webster CE, Hollis TK. Extreme π-Loading as a Design Element for Accessing Imido Ligand Reactivity. A CCC-NHC Pincer Tantalum Bis(imido) Complex: Synthesis, Characterization, and Catalytic Oxidative Amination of Alkenes. Organometallics 2016. [DOI: 10.1021/acs.organomet.6b00216] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Theodore R. Helgert
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
- Department
of Chemistry and Biochemistry, The University of Mississippi, Oxford, Mississippi 38655, United States
| | - Xiaofei Zhang
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Hannah K. Box
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Jason A. Denny
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Henry U. Valle
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Allen G. Oliver
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Gopalakrishna Akurathi
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - Charles Edwin Webster
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
| | - T. Keith Hollis
- Department
of Chemistry and Center for Computational Sciences, Mississippi State University, Mississippi State, Mississippi 39762, United States
- Department
of Chemistry and Biochemistry, The University of Mississippi, Oxford, Mississippi 38655, United States
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28
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Zhang L, Hou G, Zi G, Ding W, Walter MD. Influence of the 5f Orbitals on the Bonding and Reactivity in Organoactinides: Experimental and Computational Studies on a Uranium Metallacyclopropene. J Am Chem Soc 2016; 138:5130-42. [PMID: 27070508 DOI: 10.1021/jacs.6b01391] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The synthesis, structure, and reactivity of a uranium metallacyclopropene were comprehensively studied. Reduction of (η(5)-C5Me5)2UCl2 (1) with potassium graphite (KC8) in the presence of bis(trimethylsilyl)acetylene (Me3SiC≡CSiMe3) allows the first stable uranium metallacyclopropene (η(5)-C5Me5)2U[η(2)-C2(SiMe3)2] (2) to be isolated. Magnetic susceptibility data confirm that 2 is a U(IV) complex, and density functional theory (DFT) studies indicate substantial 5f orbital contributions to the bonding of the metallacyclopropene U-(η(2)-C═C) moiety, leading to more covalent bonds between the (η(5)-C5Me5)2U(2+) and [η(2)-C2(SiMe3)2](2-) fragments than those in the related Th(IV) compound. Consequently, very different reactivity patterns emerge, e.g., 2 can act as a source for the (η(5)-C5Me5)2U(II) fragment when reacted with alkynes and a variety of heterounsaturated molecules such as imines, bipy, carbodiimide, organic azides, hydrazine, and azo derivatives.
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Affiliation(s)
- Lei Zhang
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Guohua Hou
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Guofu Zi
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Wanjian Ding
- Department of Chemistry, Beijing Normal University , Beijing 100875, China
| | - Marc D Walter
- Institut für Anorganische und Analytische Chemie, Technische Universität Braunschweig , Hagenring 30, 38106 Braunschweig, Germany
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29
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Xiang L, Xie Z. Tantallacarborane Mediated Consecutive C–C and C–N Coupling Reactions of Alkyl Isonitriles: A Facile Route to N-Heterocycles. Organometallics 2016. [DOI: 10.1021/acs.organomet.5b00953] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Li Xiang
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
| | - Zuowei Xie
- Department of Chemistry and
State Key Laboratory of Synthetic Chemistry, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China
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30
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Hamzaoui B, Pelletier JDA, El Eter M, Chen Y, Abou-Hamad E, Basset JM. Isolation and Characterization of Well-Defined Silica-Supported Azametallacyclopentane: A Key Intermediate in Catalytic Hydroaminoalkylation Reactions. Adv Synth Catal 2015. [DOI: 10.1002/adsc.201500484] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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31
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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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32
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Sattler A, Parkin G. Synthesis, Structural Characterization, and Cyclometalation Chemistry of Tantalum Terphenyl Compounds. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00158] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Aaron Sattler
- Department
of Chemistry, Columbia University, 3000 Broadway, MC 3115, New York, New York 10027, United States
| | - Gerard Parkin
- Department
of Chemistry, Columbia University, 3000 Broadway, MC 3115, New York, New York 10027, United States
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33
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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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34
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Tobisch S. Computational Mechanistic Elucidation of the Intramolecular Aminoalkene Hydroamination Catalysed by Iminoanilide Alkaline-Earth Compounds. Chemistry 2015; 21:6765-79. [DOI: 10.1002/chem.201500233] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Indexed: 11/06/2022]
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35
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Yeagle KP, Hester D, Piro NA, Dougherty WG, Kassel WS, Graves CR. Synthesis, Characterization, and Catalytic Activity of a Series of Aluminium–Amidate Complexes. Aust J Chem 2015. [DOI: 10.1071/ch14514] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The aluminium complexes {[κ2-N,O-(t-BuNCOPh)]AlMe2}2 (2), [κ2-N,O-(t-BuNCOPh)]2AlMe (3), and [κ2-N,O-(t-BuNCOPh)]3Al (4) were prepared through the protonolysis reaction between trimethylaluminium and one, two, or three equivalents, respectively, of N-tert-butylbenzamide. Complex 2 was also prepared via a salt metathesis reaction between K(t-BuNCOPh) and dimethylaluminium chloride. Complexes 2–4 were characterized using 1H and 13C NMR spectroscopy. Single-crystal X-ray diffraction analysis of the complexes corroborated ligand : metal stoichiometries and revealed that all the amidate ligands coordinate to the aluminium ion in a κ2 fashion. The Al–amidate complexes 2–4 were viable catalyst precursors for the Meerwein–Ponndorf–Verley–Oppenauer reduction–oxidation manifold, successfully interconverting several classes of carbonyl and alcohol substrates.
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36
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Chong E, Brandt JW, Schafer LL. 2-Pyridonate tantalum complexes for the intermolecular hydroaminoalkylation of sterically demanding alkenes. J Am Chem Soc 2014; 136:10898-901. [PMID: 25041474 DOI: 10.1021/ja506187m] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The design and synthesis of a mixed 2-pyridonate-Ta(NMe2)3Cl complex for the direct C-H alkylation adjacent to nitrogen in unprotected secondary amines are reported. The hydroaminoalkylation of sterically demanding internal alkenes gives the direct, catalytic formation of C(sp(3))-C(sp(3)) bonds. Substrate scope investigations reveal key strategies for further catalyst development efforts in this 100% atom-economic synthesis of α-alkylated amines.
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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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37
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Zhao N, Wang Q, Hou G, Song H, Zi G. Synthesis, structure, and catalytic activity of aluminum chloride complexes with chiral biaryl Schiff-base ligands. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2014.03.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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38
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Ren W, Chen L, Zhao N, Wang Q, Hou G, Zi G. Synthesis, structure, and catalytic activity of organolanthanide complexes with chiral biaryl Schiff-base ligands. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2014.02.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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39
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Wang L, Hunter SC, Song Z, Steren CA, Chen T, Wei Z, Cai H, Xue ZL. CH Bond Activation during and after the Reactions of a Metallacyclic Amide with Silanes: Formation of a μ-Alkylidene Hydride Complex, Its H-D Exchange, and β-H Abstraction by a Hydride Ligand. Chemistry 2014; 20:6033-9. [DOI: 10.1002/chem.201303166] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2013] [Revised: 01/21/2014] [Indexed: 11/10/2022]
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40
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Abstract
The dioxomolybdenum(vi) complex ((t)BuClipH2)MoO2 ((t)BuClipH4 = 4,4'-di-tert-butyl-N,N'-bis(3,5-di-tert-butyl-2-hydroxyphenyl)-2,2'-diaminobiphenyl) reacts with 3,5-di-tert-butylcatechol to form oxo-free ((t)BuClip)Mo(3,5-(t)Bu2Cat). The bis(amidophenoxide)-monocatecholate complex is monomeric and exhibits a cis-β geometry in the solid state. Variable-temperature NMR data are consistent with two fluxional processes, one that interconverts several geometric isomers at low temperature, and a second that interchanges the ends of the (t)BuClip ligand at ambient temperatures. The high-temperature fluxional process can be explained by a single Bailar trigonal twist coupled with atropisomerization of the chiral diaminobiaryl backbone. Addition of excess catechol to ((t)BuClipH2)MoO2 results in formation of a dimolybdenum mono-oxo complex ((t)BuClip)Mo(μ-3,5-(t)Bu2Cat)2Mo(O)(3,5-(t)Bu2Cat). This complex, which contains a seven-coordinate bis(amidophenoxide)molybdenum center and a six-coordinate oxomolybdenum center, represents a structural hybrid between dimeric oxomolybdenumbis(catecholate) and molybdenum tris(catecholate) complexes. Both mono- and dimolybdenum complexes are best formulated as containing Mo(vi), but there is structural evidence for significant π donation from the amidophenolates. ((t)BuClip)Mo(3,5-(t)Bu2Cat) binds pyridine to form a mixture of isomeric seven-coordinate adducts. The Lewis acidity of the mixed amidophenoxide-catecholate appears to be lower than its tris(catecholate) or oxobis(amidophenoxide) analogues, which manifests itself principally in relatively slow binding of pyridine to the six-coordinate complex (k = 8 × 10(4) L mol(-1) s(-1) at 0 °C) rather than in the rate of dissociation of pyridine from the seven-coordinate adduct.
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Affiliation(s)
- Sukesh Shekar
- Department of Chemistry and Biochemistry, 251 Nieuwland Science Hall, University of Notre Dame, Notre Dame, IN 46556-5670, USA.
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41
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Zhao N, Wang Q, Hou G, Song H, Zi G. Synthesis, structure, and catalytic activity of binuclear aluminum chloride complexes with chiral biaryl-based ligands. INORG CHEM COMMUN 2014. [DOI: 10.1016/j.inoche.2013.12.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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42
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Zhao N, Wang Q, Hou G, Song H, Zi G. Synthesis, structure, and catalytic activity of organoaluminum complexes with chiral biaryl Schiff-base ligands. Inorganica Chim Acta 2014. [DOI: 10.1016/j.ica.2014.01.009] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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43
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Zhao N, Wang Q, Hou G, Song H, Zi G. Synthesis, structure, and catalytic activity of binuclear aluminum complexes with chiral biaryl-based N2O ligands. J Organomet Chem 2014. [DOI: 10.1016/j.jorganchem.2013.12.035] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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Xiang L, Xie Z. Conversion of (η5-C2B9H10R)TaX3 (X = Me, NMe2) to (η6-C2B9H10R)TaX′ (X′ = NMe2, azaallyl) in the absence of a reducing agent: synthesis and structure of tantallacarboranes incorporating an arachno-η6-C2B94− ligand. Chem Commun (Camb) 2014; 50:8249-52. [DOI: 10.1039/c4cc03981e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Schmitt DC, Lee J, Dechert-Schmitt AMR, Yamaguchi E, Krische MJ. Ruthenium catalyzed hydroaminoalkylation of isoprene via transfer hydrogenation: byproduct-free prenylation of hydantoins. Chem Commun (Camb) 2013; 49:6096-8. [PMID: 23722271 DOI: 10.1039/c3cc43463j] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The ruthenium catalyst derived from Ru3(CO)12 and triphos [Ph2P(CH2CH2PPh2)2] promotes the direct C-C coupling of isoprene with aryl substituted hydantoins 1a–1f at the diene C4-position to furnish products of n-prenylation 2a–2f. A mechanism involving hydantoin dehydrogenation followed by diene-imine oxidative coupling to furnish a transient aza-ruthencyclopentene is proposed.
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Affiliation(s)
- Daniel C Schmitt
- Department of Chemistry and Biochemistry, University of Texas at Austin, Austin, TX 78712, USA
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46
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Tsurugi H, Yamamoto K, Nagae H, Kaneko H, Mashima K. Direct functionalization of unactivated C-H bonds catalyzed by group 3-5 metal alkyl complexes. Dalton Trans 2013; 43:2331-43. [PMID: 24336916 DOI: 10.1039/c3dt52758a] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This perspective summarizes direct C-H bond functionalization reactions catalyzed by group 3-5 metal alkyl complexes. Metal-carbon bonds of group 3-5 metals have potentially high reactivity toward both C-H bond activation reactions through the intrinsic σ-bond metathesis pathway and insertion of unsaturated organic molecules. Upon the combination of these two elemental steps, direct C-H bond functionalization reactions of (hetero)aromatic compounds, methane, alkylamines, and terminal alkynes, proceed through C(sp)-H, C(sp(2))-H, and C(sp(3))-H bond activation reactions. Here we review as catalysts for these transformations not only simple metallocene complexes but also non-metallocene complexes supported by a variety of ligands, which are often superior in terms of catalyst design and catalytic activity.
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Affiliation(s)
- Hayato Tsurugi
- Department of Chemistry, Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
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47
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Mohri S, Yoshiwaka S, Isozaki K, Yonezawa N, Okamoto A. Head-to-tail square-shaped cyclic hydrogen bonds leading to dimeric aggregates: 1,8-dibenzoyl-2,7-dihydroxynaphthalene and a comparison with its analogous benzoylnaphthalene. Acta Crystallogr C 2013; 69:1541-4. [DOI: 10.1107/s0108270113030771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 11/08/2013] [Indexed: 11/10/2022] Open
Abstract
The title compound, C24H16O4, crystallized with two independent molecules in the asymmetric unit. Both carbonyl groups in these molecules form intramolecular O—H...O=C hydrogen bonds with neighbouring hydroxy groups, affording six-membered cyclic structures. In the crystal, dimeric aggregates arise from two intermolecular O—H...O=C hydrogen bonds between both independent molecules, forming head-to-tail square-shaped cyclic ...O...H...O...H... hydrogen bonds. These dimeric aggregates are connected into layers in thebcplane by intermolecular (naphthalene)C—H...O=C interactions. On the other hand, the analogous compound bearing methoxy groups at the 2- and 7-positions of the naphthalene ring, namely 1,8-dibenzoyl-2,7-dimethoxynaphthalene [Nakaemaet al.(2008).Acta Cryst.E64, o807], forms a three-dimensional molecular networkviaC—H...O=C and π–π interactions between the benzoyl groups. These results show that the intramolecular O—H...O=C hydrogen bonds in the title compound control the orientations of the benzoyl groups and thus promote the formation of the cyclic intermolecular O—H...O=C interactions involving the same donor and acceptor groups in pairs of molecules.
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48
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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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49
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López-Encarnación JM, Tanabe KK, Johnson MJA, Jellinek J. Characterizing Metal Coordination Environments in Porous Organic Polymers: A Joint Density Functional Theory and Experimental Infrared Spectroscopy Study. Chemistry 2013; 19:13646-51. [DOI: 10.1002/chem.201302812] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Indexed: 11/10/2022]
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50
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Garcia P, Lau YY, Perry MR, Schafer LL. Phosphoramidate Tantalum Complexes for Room-Temperature CH Functionalization: Hydroaminoalkylation Catalysis. Angew Chem Int Ed Engl 2013; 52:9144-8. [DOI: 10.1002/anie.201304153] [Citation(s) in RCA: 85] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2013] [Indexed: 12/11/2022]
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