1
|
Sharma A, So S, Kim JH, MacMillan SN, Baik MH, Trovitch RJ. An Aryl Diimine Cobalt(I) Catalyst for Carbonyl Hydrosilylation. Chem Commun (Camb) 2022; 58:10793-10796. [DOI: 10.1039/d2cc04089a] [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
Through the application of a redox-innocent aryl diimine chelate, the discovery and utilization of a cobalt catalyst, (Ph2PPrADI)Co, that exhibits carbonyl hydrosilylation turnover frequencies of up to 330 s–1 is...
Collapse
|
2
|
Pang Y, Leutzsch M, Nöthling N, Katzenburg F, Cornella J. Catalytic Hydrodefluorination via Oxidative Addition, Ligand Metathesis, and Reductive Elimination at Bi(I)/Bi(III) Centers. J Am Chem Soc 2021; 143:12487-12493. [PMID: 34358426 PMCID: PMC8377712 DOI: 10.1021/jacs.1c06735] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Herein, we report a hydrodefluorination reaction of polyfluoroarenes catalyzed by bismuthinidenes, Phebox-Bi(I) and OMe-Phebox-Bi(I). Mechanistic studies on the elementary steps support a Bi(I)/Bi(III) redox cycle that comprises C(sp2)-F oxidative addition, F/H ligand metathesis, and C(sp2)-H reductive elimination. Isolation and characterization of a cationic Phebox-Bi(III)(4-tetrafluoropyridyl) triflate manifests the feasible oxidative addition of Phebox-Bi(I) into the C(sp2)-F bond. Spectroscopic evidence was provided for the formation of a transient Phebox-Bi(III)(4-tetrafluoropyridyl) hydride during catalysis, which decomposes at low temperature to afford the corresponding C(sp2)-H bond while regenerating the propagating Phebox-Bi(I). This protocol represents a distinct catalytic example where a main-group center performs three elementary organometallic steps in a low-valent redox manifold.
Collapse
Affiliation(s)
- Yue Pang
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Markus Leutzsch
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Nils Nöthling
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Felix Katzenburg
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| | - Josep Cornella
- Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, Mülheim an der Ruhr 45470, Germany
| |
Collapse
|
3
|
Růžičková Z, Jambor R, Novák M. Spontaneous Hydrosilylation of Substituted C=N Imines. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| |
Collapse
|
4
|
Cloutier JP, Rechignat L, Canac Y, Ess DH, Zargarian D. C-O and C-N Functionalization of Cationic, NCN-Type Pincer Complexes of Trivalent Nickel: Mechanism, Selectivity, and Kinetic Isotope Effect. Inorg Chem 2019; 58:3861-3874. [PMID: 30821151 DOI: 10.1021/acs.inorgchem.8b03489] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This report presents the synthesis of new mono- and dicationic NCN-NiIII complexes and describes their reactivities with protic substrates. (NCN is the pincer-type ligand κ N, κ C, κ N-2,6-(CH2NMe2)2-C6H3.) Treating van Koten's trivalent complex (NCN)NiIIIBr2 with AgSbF6 in acetonitrile gives the dicationic complex [(NCN)NiIII(MeCN)3]2+, whereas the latter complex undergoes a ligand-exchange reaction with (NCN)NiIIIBr2 to furnish the related monocationic complex [(NCN)NiIII(Br)(MeCN)]+. These trivalent complexes have been characterized by X-ray diffraction analysis and EPR spectroscopy. Treating these trivalent complexes with methanol and methylamine led, respectively, to C-OCH3 or C-NH(CH3) functionalization of the Ni-aryl moiety in these complexes, C-heteroatom bond formation taking place at the ipso-C. These reactions also generate the cationic divalent complex [(NCN)NiII(NCMe)]+, which was prepared independently and characterized fully. The unanticipated formation of the latter divalent species suggested a comproportionation side reaction between the cationic trivalent precursors and a monovalent species generated at the C-O and C-N bond formation steps; this scenario was supported by direct reaction of the trivalent complexes with the monovalent compound (PPh3)3NiICl. Kinetic measurements and density functional theory analysis have been used to investigate the mechanism of these C-O and C-N functionalization reactions and to rationalize the observed inverse kinetic isotope effect in the reaction of [(NCN)NiIII(Br)(MeCN)]+ with CH3OH/CD3OD.
Collapse
Affiliation(s)
| | | | - Yves Canac
- LCC-CNRS , Université de Toulouse , CNRS, Toulouse , France
| | - Daniel H Ess
- Department of Chemistry and Biochemistry , Brigham Young University , Provo , Utah 84604 , United States
| | - Davit Zargarian
- Département de chimie , Université de Montréal , Montréal , Québec H3C 3J7 , Canada
| |
Collapse
|
5
|
Rani V, Singh HB, Butcher RJ. NCN Nickel(II) Pincer Complexes of 5‐
tert
‐Butyl‐1,3‐bis(
N
‐substituted benzimidazol‐2′‐yl)benzenes: Solid and Solution State Behaviour. ChemistrySelect 2018. [DOI: 10.1002/slct.201802644] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Varsha Rani
- Department of ChemistryIndian Institute of Technology Bombay Mumbai 400076 India
| | - Harkesh B. Singh
- Department of ChemistryIndian Institute of Technology Bombay Mumbai 400076 India
| | - Ray J. Butcher
- Department of ChemistryHoward University 525 College Street NW, Washington, D.C. 20059 United States
| |
Collapse
|
6
|
Shevick SL, Obradors C, Shenvi RA. Mechanistic Interrogation of Co/Ni-Dual Catalyzed Hydroarylation. J Am Chem Soc 2018; 140:12056-12068. [PMID: 30153002 PMCID: PMC6329606 DOI: 10.1021/jacs.8b06458] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cobalt/nickel-dual catalyzed hydroarylation of terminal olefins with iodoarenes builds complexity from readily available starting materials, with a high preference for the Markovnikov (branched) product. Here, we advance a mechanistic model of this reaction through the use of reaction progress kinetic analysis (RPKA), radical clock experiments, and stoichiometric studies. Through exclusion of competing hypotheses, we conclude that the reaction proceeds through an unprecedented alkylcobalt to nickel direct transmetalation. Demonstration of catalytic alkene prefunctionalization, via spectroscopic observation of an organocobalt species, distinguishes this Csp2-Csp3 cross-coupling method from a conventional transmetalation process, which employs a stoichiometric organometallic nucleophile, and from a bimetallic oxidative addition of an organohalide across nickel, described by radical scission and subsequent alkyl radical capture at a second nickel center. A refined understanding of the reaction leads to an optimized hydroarylation procedure that excludes exogenous oxidant, demonstrating that the transmetalation is net redox neutral. Catalytic alkene prefunctionalization by cobalt and engagement with nickel catalytic cycles through direct transmetalation provides a new platform to merge these two rich areas of chemistry in preparatively useful ways.
Collapse
Affiliation(s)
- Sophia L Shevick
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Carla Obradors
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Ryan A Shenvi
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| |
Collapse
|
7
|
Kremláček V, Hyvl J, Yoshida WY, Růžička A, Rheingold AL, Turek J, Hughes RP, Dostál L, Cain MF. Heterocycles Derived from Generating Monovalent Pnictogens within NCN Pincers and Bidentate NC Chelates: Hypervalency versus Bell-Clappers versus Static Aromatics. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00290] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Vít Kremláček
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 53210, Czech Republic
| | - Jakub Hyvl
- Department of Chemistry, University of Hawai‘i at Ma̅noa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Wesley Y. Yoshida
- Department of Chemistry, University of Hawai‘i at Ma̅noa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 53210, Czech Republic
| | - Arnold L. Rheingold
- Department of Chemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093, United States
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC), Vrije Universiteit Brussel (VUB), Pleinlaan 2, B-1050 Brussels, Belgium
| | - Russell P. Hughes
- Department of Chemistry, Dartmouth College, 6128 Burke Laboratory, Hanover, New Hampshire 03755, United States
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 53210, Czech Republic
| | - Matthew F. Cain
- Department of Chemistry, University of Hawai‘i at Ma̅noa, 2545 McCarthy Mall, Honolulu, Hawaii 96822, United States
| |
Collapse
|
8
|
Gafurov ZN, Kagilev AA, Kantyukov AO, Balabaev AA, Sinyashin OG, Yakhvarov DG. Classification and synthesis of nickel pincer complexes. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2086-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
9
|
Jia T, Xu SY, Huang LC, Gao W. Scandium and gadolinium complexes with aryldiimine NCN pincer ligands: Synthesis, characterization, and catalysis on isoprene and 1,5-hexadiene polymerization. Polyhedron 2018. [DOI: 10.1016/j.poly.2018.02.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
10
|
Sun W, Wang L, Xia C, Liu C. Dual Functionalization of α-Monoboryl Carbanions through Deoxygenative Enolization with Carboxylic Acids. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201801679] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Wei Sun
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Lu Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| | - Chungu Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| |
Collapse
|
11
|
Sun W, Wang L, Xia C, Liu C. Dual Functionalization of α-Monoboryl Carbanions through Deoxygenative Enolization with Carboxylic Acids. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/anie.201801679] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Wei Sun
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Lu Wang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| | - Chungu Xia
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| | - Chao Liu
- State Key Laboratory for Oxo Synthesis and Selective Oxidation; Suzhou Research Institute of LICP, Lanzhou Institute of Chemical Physics (LICP); Chinese Academy of Sciences; Lanzhou 730000 P. R. China
| |
Collapse
|
12
|
Jiang Y, Gendy C, Roesler R. Nickel, Ruthenium, and Rhodium NCN-Pincer Complexes Featuring a Six-Membered N-Heterocyclic Carbene Central Moiety and Pyridyl Pendant Arms. Organometallics 2018. [DOI: 10.1021/acs.organomet.8b00022] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Yanmin Jiang
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4 Canada
| | - Chris Gendy
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4 Canada
| | - Roland Roesler
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4 Canada
| |
Collapse
|
13
|
Hyvl J, Yoshida WY, Moore CE, Rheingold AL, Cain MF. Unexpected detours and reactivity encountered during the planned synthesis of hypervalent 10–Pn–3 species (Pn = P or As). Polyhedron 2018. [DOI: 10.1016/j.poly.2017.08.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
14
|
Rovira M, Roldán-Gómez S, Martin-Diaconescu V, Whiteoak CJ, Company A, Luis JM, Ribas X. Trifluoromethylation of a Well-Defined Square-Planar Aryl-Ni II Complex involving Ni III /CF 3. and Ni IV -CF 3 Intermediate Species. Chemistry 2017; 23:11662-11668. [PMID: 28685908 DOI: 10.1002/chem.201702168] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Indexed: 11/11/2022]
Abstract
Ni-mediated trifluoromethylation of an aryl-Br bond in model macrocyclic ligands (Ln -Br) has been thoroughly studied, starting with an oxidative addition at Ni0 to obtain well-defined aryl-NiII -Br complexes ([Ln -NiII ]Br). Abstraction of the halide with AgX (X=OTf- or ClO4- ) thereafter provides [Ln -NiII ](OTf). The nitrate analogue has been obtained through a direct C-H activation of an aryl-H bond using NiII salts, and this route has been studied by X-ray absorption spectroscopy (XAS). Crystallographic XRD and XAS characterization has shown a tight macrocyclic coordination in the aryl-NiII complex, which may hamper direct reaction with nucleophiles. On the contrary, enhanced reactivity is observed with oxidants, and the reaction of [Ln -NiII ](OTf) with CF3+ sources afforded Ln -CF3 products in quantitative yield. A combined experimental and theoretical mechanistic study provides new insights into the operative mechanism for this transformation. Computational analysis indicates the occurrence of an initial single electron transfer (SET) to 5-(trifluoromethyl)dibenzothiophenium triflate (TDTT), producing a transient L1 -NiIII /CF3. adduct, which rapidly recombines to form a [L1 -NiIV -CF3 ](X)2 intermediate species. A final facile reductive elimination affords L1 -CF3 . The well-defined square-planar model system studied here permits to gain fundamental knowledge on the rich redox chemistry of nickel, which is sought to facilitate the development of new Ni-based trifluoromethylation methodologies.
Collapse
Affiliation(s)
- Mireia Rovira
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Steven Roldán-Gómez
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Vlad Martin-Diaconescu
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Christopher J Whiteoak
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain.,Biomolecular Sciences Research Centre, Faculty of Health and Wellbeing, Sheffield Hallam University, City Campus, Sheffield, S1 1WB, UK
| | - Anna Company
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Josep M Luis
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| | - Xavi Ribas
- Institut de Química Computacional i Catàlisi (IQCC) and Departament de Química, Universitat de Girona, Campus Montilivi, Facultat Ciències, 17003, Girona, Catalonia, Spain
| |
Collapse
|
15
|
Synthesis, Structure and Reactivity of Cyclometalated Nickel(II) Complexes: A Review and Perspective. PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES INDIA SECTION A-PHYSICAL SCIENCES 2016. [DOI: 10.1007/s40010-016-0289-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
16
|
Xiang W, Luo Q, Jiang H, Meng X, Li R, Zhang J, Peng T. New Ni(II) complexes based on N′NN′ pincer ligands: syntheses, structures and B–F cleavage of BF4− promoted by a di-cationic Ni(II) center. J COORD CHEM 2016. [DOI: 10.1080/00958972.2016.1196360] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Wenjing Xiang
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| | - Qin Luo
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| | - Huan Jiang
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| | - Xianggao Meng
- Key Laboratory of Pesticide and Chemical Biology, Ministry of Education and School of Chemistry, Central China Normal University, Wuhan, PR China
| | - Renjie Li
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| | - Jing Zhang
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| | - Tianyou Peng
- College of Chemistry & Molecular Science, Wuhan University, Wuhan, PR China
| |
Collapse
|
17
|
|
18
|
Zhao D, Krause JA, Connick WB. Platinum(II) Monomer and Dimer Complexes with a Bis(oxazolinyl)phenyl Pincer Ligand. Inorg Chem 2015; 54:8339-47. [DOI: 10.1021/acs.inorgchem.5b01022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Daoli Zhao
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - Jeanette A. Krause
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| | - William B. Connick
- Department of Chemistry, University of Cincinnati, P.O. Box 210172, Cincinnati, Ohio 45221-0172, United States
| |
Collapse
|
19
|
Arai T, Moribatake T, Masu H. Chiral Bis(imidazolidine)-Derived NCN Pincer Rh Complex for Catalytic Asymmetric Mannich Reaction of Malononitrile withN-Boc Imines. Chemistry 2015; 21:10671-5. [DOI: 10.1002/chem.201502097] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2015] [Indexed: 12/16/2022]
|
20
|
Novák M, Bouška M, Dostál L, Růžička A, Hoffmann A, Herres-Pawlis S, Jambor R. Less is more: three-coordinate c,n-chelated distannynes and digermynes. Chemistry 2015; 21:7820-9. [PMID: 25877759 DOI: 10.1002/chem.201500695] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2015] [Indexed: 11/08/2022]
Abstract
We report here the synthesis of new C,N-chelated chlorostannylenes and germylenes L(3) MCl (M=Sn(1), Ge (2)) and L(4) MCl (M=Sn(3), Ge (4)) containing sterically demanding C,N-chelating ligands L(3, 4) (L(3) =[2,4-di-tBu-6-(Et2 NCH2 )C6 H2 ](-) ; L(4) =[2,4-di-tBu-6-{(C6 H3 -2',6'-iPr2 )N=CH}C6 H2 ](-) ). Reductions of 1-4 yielded three-coordinate C,N-chelated distannynes and digermynes [L(3, 4) M]2 for the first time (5: L(3) , M=Sn, 6: L(3) , M=Ge, 7: L(4) , M=Sn, 8: L(4) , M=Ge). For comparison, the four-coordinate distannyne [L(5) Sn]2 (10) stabilized by N,C,N-chelate L(5) (L(5) =[2,6-{(C6 H3 -2',6'-Me2 )NCH}2 C6 H3 ](-) ) was prepared by the reduction of chlorostannylene L(5) SnCl (9). Hence, we highlight the role of donor-driven stabilization of tetrynes. Compounds 1-10 were characterized by means of elemental analysis, NMR spectroscopy, and in the case of 1, 2, 5-7, and 10, also by single-crystal X-ray diffraction analysis. The bonding situation in either three- or four-coordinate distannynes 5, 7, and 10 was evaluated by DFT calculations. DFT calculations were also used to compare the nature of the metal-metal bond in three-coordinate C,N-chelating distannyne [L(3) Sn]2 (5) and related digermyme [L(3) Ge]2 (6).
Collapse
Affiliation(s)
- Miroslav Novák
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice (Czech Republic)
| | | | | | | | | | | | | |
Collapse
|
21
|
Wang Y, Guo X, Wu B, Wei D, Tang M. Mechanistic and stereoselectivity study for the reaction of trifluoropyruvates with arylpropenes catalyzed by a cationic Lewis acid rhodium complex. RSC Adv 2015. [DOI: 10.1039/c5ra21074g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
The mechanism and stereoselectivity of a Lewis acid catalyzed carbonyl–ene reaction of trifluoropyruvates with arylpropenes have been investigated using a DFT method.
Collapse
Affiliation(s)
- Yang Wang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Xiaokang Guo
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Bohua Wu
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Donghui Wei
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| | - Mingsheng Tang
- The College of Chemistry and Molecular Engineering
- Center of Computational Chemistry
- Zhengzhou University
- Zhengzhou
- P. R. China
| |
Collapse
|
22
|
Cloutier JP, Vabre B, Moungang-Soumé B, Zargarian D. Synthesis and Reactivities of New NCN-Type Pincer Complexes of Nickel. Organometallics 2014. [DOI: 10.1021/om5010176] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Boris Vabre
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| | | | - Davit Zargarian
- Département de chimie, Université de Montréal, Montréal, Québec, Canada H3C 3J7
| |
Collapse
|
23
|
Filimon SA, Petrovic D, Volbeda J, Bannenberg T, Jones PG, Freiherr von Richthofen CG, Glaser T, Tamm M. 3d Metal Complexes Supported by a Bis(imidazolin-2-imino)pyridine Pincer Ligand - Synthesis, Structural Characterisation, and Magnetic Properties. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201402804] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
24
|
Hao XQ, Zhao YW, Yang JJ, Niu JL, Gong JF, Song MP. Enantioselective Hydrophosphination of Enones with Diphenylphosphine Catalyzed by Bis(imidazoline) NCN Pincer Palladium(II) Complexes. Organometallics 2014. [DOI: 10.1021/om500144b] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Xin-Qi Hao
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Yong-Wei Zhao
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jing-Jing Yang
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jun-Long Niu
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Jun-Fang Gong
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| | - Mao-Ping Song
- College
of Chemistry and Molecular Engineering, Henan Key Laboratory of Chemical
Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
| |
Collapse
|
25
|
Chia SP, Li Y, Ganguly R, So CW. Heteroleptic Germanium(II) and Tin(II) Chlorides Supported by Anionic Ligands Derived from 2,3-Dimethyl-1,4-diaza-1,3-butadiene. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300830] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
26
|
Wang T, Hao XQ, Huang JJ, Niu JL, Gong JF, Song MP. Chiral Bis(imidazolinyl)phenyl NCN Pincer Rhodium(III) Catalysts for Enantioselective Allylation of Aldehydes and Carbonyl–Ene Reaction of Trifluoropyruvates. J Org Chem 2013; 78:8712-21. [DOI: 10.1021/jo4014194] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Tao Wang
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Xin-Qi Hao
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Juan-Juan Huang
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Jun-Long Niu
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Jun-Fang Gong
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| | - Mao-Ping Song
- Henan Key Laboratory of Chemical
Biology and Organic Chemistry, The College of Chemistry and Molecular
Engineering, Zhengzhou University, Zhengzhou 450052, People’s Republic of China
| |
Collapse
|
27
|
Hosokawa S, Ito JI, Nishiyama H. NCN-Pincer Cobalt Complexes Containing Bis(oxazolinyl)phenyl Ligands. Organometallics 2013. [DOI: 10.1021/om400450n] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Satomi Hosokawa
- Department of Applied
Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Jun-ichi Ito
- Department of Applied
Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| | - Hisao Nishiyama
- Department of Applied
Chemistry, Graduate School of Engineering, Nagoya University, Chikusa, Nagoya 464-8603, Japan
| |
Collapse
|
28
|
Pan Y, Xu T, Yang GW, Jin K, Lu XB. Bis(oxazolinyl)phenyl-Ligated Rare-Earth-Metal Complexes: Highly Regioselective Catalysts for cis-1,4-Polymerization of Isoprene. Inorg Chem 2013; 52:2802-8. [DOI: 10.1021/ic300976p] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yu Pan
- State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Tieqi Xu
- State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Guan-Wen Yang
- State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Kun Jin
- State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China
| | - Xiao-Bing Lu
- State Key Laboratory of Fine Chemicals, College of Chemistry, Dalian University of Technology, Dalian 116024, China
| |
Collapse
|
29
|
Hurtado J, Nagles E, Arancibia V, Rojas R, Valderrama M, Fröhlich R. Synthesis and structural characterization of new 2-bromo-1,3-bis(triazol-1-ylmethyl)benzene ligands. Study of their behavior as complexing agents for determination of nickel(II) by adsorptive stripping voltammetry. J COORD CHEM 2013. [DOI: 10.1080/00958972.2013.764997] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- John Hurtado
- a Facultad de Química, Departamento de Química Inorgánica , Pontificia Universidad Católica de Chile , Santiago , Chile
| | - Edgar Nagles
- a Facultad de Química, Departamento de Química Inorgánica , Pontificia Universidad Católica de Chile , Santiago , Chile
| | - Verónica Arancibia
- a Facultad de Química, Departamento de Química Inorgánica , Pontificia Universidad Católica de Chile , Santiago , Chile
| | - René Rojas
- a Facultad de Química, Departamento de Química Inorgánica , Pontificia Universidad Católica de Chile , Santiago , Chile
| | - Mauricio Valderrama
- a Facultad de Química, Departamento de Química Inorgánica , Pontificia Universidad Católica de Chile , Santiago , Chile
| | - Roland Fröhlich
- b Organisch-Chemisches Institut der Universität Münster , Münster , Germany
| |
Collapse
|
30
|
|
31
|
|
32
|
Vabre B, Lambert ML, Petit A, Ess DH, Zargarian D. Nickelation of PCP- and POCOP-Type Pincer Ligands: Kinetics and Mechanism. Organometallics 2012. [DOI: 10.1021/om3003784] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Boris Vabre
- Département
de chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| | - Melinda L. Lambert
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Alban Petit
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Daniel H. Ess
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah
84602, United
States
| | - Davit Zargarian
- Département
de chimie, Université de Montréal, Montréal (Québec),
Canada H3C 3J7
| |
Collapse
|
33
|
Hybrid NCS palladium pincer complexes of thiophosphorylated benzaldimines and their ketimine analogs. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.03.029] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
34
|
Synthesis, Structure and Transmetalation Activity of Various
C
,
Y
‐Chelated Organogold(I) Compounds. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200152] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
35
|
Breitenfeld J, Scopelliti R, Hu X. Synthesis, Reactivity, and Catalytic Application of a Nickel Pincer Hydride Complex. Organometallics 2012. [DOI: 10.1021/om201279j] [Citation(s) in RCA: 83] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jan Breitenfeld
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne
(EPFL), SB-ISIC, BCH 3305, Lausanne, CH 1015, Switzerland
| | - Rosario Scopelliti
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne
(EPFL), SB-ISIC, BCH 3305, Lausanne, CH 1015, Switzerland
| | - Xile Hu
- Laboratory of Inorganic Synthesis and Catalysis, Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne
(EPFL), SB-ISIC, BCH 3305, Lausanne, CH 1015, Switzerland
| |
Collapse
|
36
|
Hao XQ, Xu YX, Yang MJ, Wang L, Niu JL, Gong JF, Song MP. A Cationic NCN Pincer Platinum(II) Aquo Complex with a Bis(imidazolinyl)phenyl Ligand: Studies toward its Synthesis and Asymmetric Friedel–Crafts Alkylation of Indoles with Nitroalkenes. Organometallics 2012. [DOI: 10.1021/om200714z] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xin-Qi Hao
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Yan-Xiao Xu
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Ming-Jun Yang
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Li Wang
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Jun-Long Niu
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Jun-Fang Gong
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| | - Mao-Ping Song
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou 450052, People’s
Republic of China
| |
Collapse
|
37
|
Ghorai D, Kumar S, Mani G. Mononuclear, helical binuclear palladium and lithium complexes bearing a new pyrrole-based NNN-pincer ligand: fluxional property. Dalton Trans 2012; 41:9503-12. [DOI: 10.1039/c2dt30816a] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
38
|
Zhang J, Gao W, Lang X, Wu Q, Zhang L, Mu Y. Ni(ii) and Fe(ii) complexes based on bis(imino)aryl pincer ligands: synthesis, structural characterization and catalytic activities. Dalton Trans 2012; 41:9639-45. [DOI: 10.1039/c2dt30778b] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Jingshun Zhang
- State Key Laboratory for Supramolecular Structure and Materials, Jilin University, 2699 Qianjin Street, Changchun 130012, People's Republic of China
| | | | | | | | | | | |
Collapse
|
39
|
Zhang Q, Zhang XQ, Wang ZX. Nickel complexes supported by quinoline-based ligands: synthesis, characterization and catalysis in the cross-coupling of arylzinc reagents and aryl chlorides or aryltrimethylammonium salts. Dalton Trans 2012; 41:10453-64. [DOI: 10.1039/c2dt30886j] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
40
|
Herbert DE, Ozerov OV. Binuclear Palladium Complexes Supported by Bridged Pincer Ligands. Organometallics 2011. [DOI: 10.1021/om2008056] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- David E. Herbert
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - Oleg V. Ozerov
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| |
Collapse
|
41
|
Kuwamura N, Kitano K, Hirotsu M, Nishioka T, Teki Y, Santo R, Ichimura A, Hashimoto H, Wright LJ, Kinoshita I. Redox‐Controlled, Reversible Rearrangement of a Tris(2‐pyridylthio)methyl Ligand on Nickel to an Isomer with an “
N
,
S
‐Confused” 2‐Pyridylthiolate Arm. Chemistry 2011; 17:10708-15. [DOI: 10.1002/chem.201100875] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Naoto Kuwamura
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
| | - Ken'ichi Kitano
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Masakazu Hirotsu
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Takanori Nishioka
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Yoshio Teki
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Ryoko Santo
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
| | - Akio Ichimura
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
| | - Hideki Hashimoto
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
| | - L. James Wright
- Department of Chemistry, University of Auckland, Private Bag 92019, Auckland (New Zealand)
| | - Isamu Kinoshita
- Departments of Material Science, Chemistry and Physics, Osaka City University, 3‐3‐138 Sugimoto, Sumiyoshi‐ku, Osaka, 558‐8585 (Japan), Fax: (+81) 6‐6690‐2753
- The OCU Advanced Research Institute for Natural Science and Technology (OCARINA)
- CREST (Japan) Science and Technology Agency, 4‐1‐8 Honcho Kawaguchi, Saitama 332‐0012 (Japan)
| |
Collapse
|
42
|
El-Zaria ME, Arii H, Nakamura H. m-Carborane-based chiral NBN pincer-metal complexes: synthesis, structure, and application in asymmetric catalysis. Inorg Chem 2011; 50:4149-61. [PMID: 21438543 DOI: 10.1021/ic2002095] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have succeeded in synthesizing m-carborane-based chiral NBN-pincer ligands, 1,7-bis(oxazolinyl)-1,7-dicarba-closo-dodecaborane (Carbox) (7-9). The combination of bis(hydroxyamides) and 3 equiv of diethylaminosulfur trifluoride (DAST) is a key step for cyclization to form oxazoline rings in excellent yields. X-ray crystal structures of these ligands confirmed three donor sites, one central B and two flanking N atoms in fixed positions. The electrophilic halogenation of the Carbox pincer ligands with iodine and a catalytic amount of Lewis acid led to ring-opening of the oxazolines and afforded bis(haloamides) (13 and 14). The air- and moisture-stable Carbox pincer complexes of rhodium(III), nickel(II), and palladium(II) were synthesized by the oxidative addition of RhCl(3)·3H(2)O, Ni(COD)(2), and Pd(CH(3)CN)(4)[BF(4)](2) to the Carbox pincer ligands (7-9), respectively. The catalytic activity of the rhodium(III) complexes (18-20) was examined for the asymmetric conjugate reduction of α,β-unsaturated esters and reductive aldol reaction. Among these catalysts, [(S,S)-Carbox-iPr]Rh(OAc)(2)·H(2)O (18) showed the highest enantioselective catalytic ability for both asymmetric conjugate reduction and reductive aldol reaction.
Collapse
Affiliation(s)
- Mohamed E El-Zaria
- Department of Chemistry, Faculty of Science, Gakushuin University, 1-5-1 Mejiro, Tokyo 171-8588, Japan
| | | | | |
Collapse
|
43
|
Qin J, Cheng Z, Zhang L, Zhang Z, Zhu J, Zhu X. A Highly Efficient Iron-Mediated AGET ATRP of Methyl Methacrylate Using Fe(0) Powder as the Reducing Agent. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201000737] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
44
|
Niu JL, Hao XQ, Gong JF, Song MP. Symmetrical and unsymmetrical pincer complexes with group 10 metals: synthesis via aryl C-H activation and some catalytic applications. Dalton Trans 2011; 40:5135-50. [PMID: 21380463 DOI: 10.1039/c0dt01439g] [Citation(s) in RCA: 161] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Aryl-based pincer metal complexes with anionic terdentate ligands have been widely applied in organic synthesis, organometallic catalysis and other related areas. Synthetically, the most simple and convenient method for the construction of these complexes is the direct metal-induced C(aryl)-H bond activation, which can be fulfilled by choosing the appropriate functional donor groups in the two side arms of the aryl-based pincer preligands. In this perspective, we wish to summarize some results achieved by our group in this context. Successful examples include symmetrical chiral bis(imidazoline) NCN pincer complexes with Ni(II), Pd(II) and Pt(II), bis(phosphinite) and bis(phosphoramidite) PCP pincer Pd(II) complexes, unsymmetrical (pyrazolyl)phosphinite, (amino)phosphinite and (imino)phosphinite PCN pincer Pd(II) complexes, chiral (imidazolinyl)phosphinite and (imidazolinyl)phosphoramidite PCN pincer complexes with Ni(II) and Pd(II) as well as unsymmetrical (oxazolinyl)amine and (oxazolinyl)pyrazole NCN' pincer Pd(II) complexes. Among them, the P-donor containing complexes are efficiently synthesized by the "one-pot phosphorylation/metalation" method. The obtained symmetrical and unsymmetrical pincer complexes have been used as catalysts in Suzuki-Miyaura reaction (Pd), asymmetric Friedel-Crafts alkylation of indole with trans-β-nitrostyrene (Pt) as well as in asymmetric allylation of aldehyde and sulfonimine (Pd). In the Suzuki couplings conducted at 40-50 °C, some unsymmetrical Pd complexes exhibit much higher activity than the related symmetrical ones which can be attributed to their faster release of active Pd(0) species resulting from the hemilabile coordination of the ligands. Literature results on the synthesis of some related pincer complexes as well as their activities in the above catalytic reactions are also presented.
Collapse
Affiliation(s)
- Jun-Long Niu
- Department of Chemistry, Henan Key Laboratory of Chemical Biology and Organic Chemistry, Zhengzhou University, Zhengzhou, 450052, China
| | | | | | | |
Collapse
|
45
|
Shao DD, Niu JL, Hao XQ, Gong JF, Song MP. Neutral and cationic chiral NCN pincer nickel(ii) complexes with 1,3-bis(2′-imidazolinyl)benzenes: synthesis and characterization. Dalton Trans 2011; 40:9012-9. [DOI: 10.1039/c1dt10329f] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
46
|
Singh N, Elias AJ. Palladacycles of novel bisoxazoline chelating ligands based on the dimeric cyclobutadiene linked cobalt sandwich compound [(η5-Cp)Co(η4-C4Ph3)]2. Dalton Trans 2011; 40:4882-91. [DOI: 10.1039/c0dt01737j] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- Nem Singh
- Department of Chemistry, Indian Institute of Technology, Delhi, Hauz Khas, New Delhi, 110016, India
| | | |
Collapse
|
47
|
Volpe EC, Manke DR, Bartholomew ER, Wolczanski PT, Lobkovsky EB. Aryl−Oxazoline Chelates of First-Row Transition Metals: Structures of {κ-C,N-(o-C6H4)CMe2(COCH2CMe2N)}FeCl(py) and [(κ-C,N-(o-C6H4)CMe2(COCH2CMe2N)}Cr(μ-Cl)]2. Organometallics 2010. [DOI: 10.1021/om100420z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Emily C. Volpe
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - David R. Manke
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Erika R. Bartholomew
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Peter T. Wolczanski
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| | - Emil B. Lobkovsky
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, United States
| |
Collapse
|
48
|
Li J, Siegler M, Lutz M, Spek AL, Klein Gebbink RJM, van Koten G. PCN- and PCS-Pincer Palladium Complexes as Tandem Catalysts in Homoallylation Reactions. Adv Synth Catal 2010. [DOI: 10.1002/adsc.201000204] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
49
|
Koizumi TA, Teratani T, Okamoto K, Yamamoto T, Shimoi Y, Kanbara T. Nickel(II) complexes bearing a pincer ligand containing thioamide units: Comparison between SNS- and SCS-pincer ligands. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.04.012] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
50
|
Šimon P, de Proft F, Jambor R, Růžička A, Dostál L. Monomeric Organoantimony(I) and Organobismuth(I) Compounds Stabilized by an NCN Chelating Ligand: Syntheses and Structures. Angew Chem Int Ed Engl 2010. [DOI: 10.1002/ange.201002209] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|