1
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Yang Y, Ebel B, Oppel IM, Patureau FW. Oxidation of NOBINs Toward α-Spiropyrrolidones. Org Lett 2024; 26:7541-7545. [PMID: 39225416 DOI: 10.1021/acs.orglett.4c02499] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/04/2024]
Abstract
While the oxidation of phenols and BINOLs is well documented to lead to a broad range of useful organic scaffolds, that of NOBINs is far less explored. We investigate herein their oxidation with a number of standard chemical oxidants, leading upon skeletal rearrangement to the corresponding α-spiropyrrolidones, which represent a rare and highly valuable heterocyclic core.
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Affiliation(s)
- Yun Yang
- Institutes of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Ben Ebel
- Institutes of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Iris M Oppel
- Institutes of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
| | - Frederic W Patureau
- Institutes of Organic Chemistry, RWTH Aachen University, Landoltweg 1, 52074 Aachen, Germany
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2
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Du J, Zhou S, Zhang X, Zhang L, Cui P, Huang Z, Wei Y, Zhu X, Wang S. Syntheses, structures and catalytic activities of low‐coordinated rare‐earth metal complexes containing 2,2′‐pyridylpyrrolides. Appl Organomet Chem 2019. [DOI: 10.1002/aoc.5275] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Jun Du
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Shuangliu Zhou
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Xiuli Zhang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Lijun Zhang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Peng Cui
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Zeming Huang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Yun Wei
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Xiancui Zhu
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
| | - Shaowu Wang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule‐based Materials, College of Chemistry and Materials ScienceAnhui Normal University Wuhu China
- State Key Laboratory of Organometallic ChemistryShanghai Institute of Organic Chemistry Shanghai China
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3
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Wang W, Wang X, Zhou S, Xu X, Du J, Zhang L, Mu X, Wei Y, Zhu X, Wang S. Syntheses, Structures, and Catalytic Activities of the Anionic Heterobimetallic Rare-Earth Metal Complexes Supported by Pyrrolyl-Substituted 1,2-Diimino Ligands. Inorg Chem 2018; 57:10390-10400. [PMID: 30074389 DOI: 10.1021/acs.inorgchem.8b01556] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Wei Wang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiaojia Wang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Shuangliu Zhou
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiaolong Xu
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Jun Du
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Lijun Zhang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiaolong Mu
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Yun Wei
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Xiancui Zhu
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
| | - Shaowu Wang
- Laboratory of Functionalized Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-Based Materials (State Key Laboratory Cultivation Base), College of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Shanghai 200032, China
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4
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Gajecki L, Berg DJ, Hoenisch J, Oliver AG. Variable coordination of carbazolyl-bis(tetrazole) ligands in lanthanide chemistry. Dalton Trans 2018; 47:15487-15496. [DOI: 10.1039/c8dt02757a] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Lanthanide complexes of 1,8-bis(2′-isopropyltetrazo-5′-yl)-3,6-di-tert-butylcarbazolide adopt geometries that include planar, buckled and tetrazolyl-bridged tridentate, as well as bidentate, bonding modes.
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Affiliation(s)
- Leah Gajecki
- Department of Chemistry
- University of Victoria
- Victoria BC V8W 2Y2
- Canada
| | - David J. Berg
- Department of Chemistry
- University of Victoria
- Victoria BC V8W 2Y2
- Canada
| | - Josh Hoenisch
- Department of Chemistry
- University of Victoria
- Victoria BC V8W 2Y2
- Canada
| | - Allen G. Oliver
- Department of Chemistry & Biochemistry
- University of Notre Dame
- Notre Dame
- USA
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5
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Zitz R, Hlina J, Aghazadeh Meshgi M, Krenn H, Marschner C, Szilvási T, Baumgartner J. Using Functionalized Silyl Ligands To Suppress Solvent Coordination to Silyl Lanthanide(II) Complexes. Inorg Chem 2017; 56:5328-5341. [PMID: 28398724 PMCID: PMC5415877 DOI: 10.1021/acs.inorgchem.7b00420] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
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The reaction of the potassium 1,3-trisilanediide
Me2Si[Si(Me3Si)2K]2 with
SmI2 and YbI2 was found to give the respective
disilylated complexes Me2Si[Si(Me3Si)2]2Sm·2THF and Me2Si[Si(Me3Si)2]2Yb·2THF. Desolvation of coordinated solvent
molecules in these complexes made their handling difficult. However,
using a number of functionalized silanide ligands, complexes with
a diminished number or even no coordinated solvent molecules were
obtained ((R3Si)2Ln(THF)x (x = 0–3)). The structures of all
new lanthanide compounds were determined by X-ray single-crystal structure
analysis. NMR spectroscopic analysis of some Yb–silyl complexes
pointed at highly ionic interactions between the silyl ligands and
the lanthanides. This bonding picture was supported by DFT calculations
at the B3PW91/Basis1 level of theory. Detailed theoretical analysis
of a disilylated Eu(II) complex suggests that its singly occupied
molecular orbitals (SOMOs) are very close in energy to the ligand
silicon lone pairs (HOMO), and SQUID magnetometry measurements of
the complex showed a deviation from the expected behavior for a free
Eu(II) ion, which might be due to a ligand–metal interaction. Utilizing a number of functionalized silanides, disilylated Ln(II)
complexes with a diminished number or even no coordinated solvent
molecules were obtained.
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Affiliation(s)
- Rainer Zitz
- Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria
| | - Johann Hlina
- Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria
| | | | - Heinz Krenn
- Institut für Physik, Fachbereich Experimentalphysik, Magnetometry und Photonics, Universität Graz , Universitätsplatz 5, 8010 Graz, Austria
| | - Christoph Marschner
- Institut für Anorganische Chemie, Technische Universität Graz , Stremayrgasse 9, 8010 Graz, Austria
| | - Tibor Szilvási
- Department of Chemical & Biological Engineering, University of Wisconsin-Madison , 1415 Engineering Drive, 53706 Madison, Wisconsin, United States
| | - Judith Baumgartner
- Institut für Chemie, Universität Graz , Stremayrgasse 9, 8010 Graz, Austria
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6
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Chai Z, Chu J, Qi Y, Tang M, Hou J, Yang G. Half-sandwich chiral rare-earth metal complexes with linked tridentate amido-indenyl ligand: synthesis, characterization, and catalytic properties for intramolecular hydroamination. RSC Adv 2017. [DOI: 10.1039/c6ra26537e] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Novel rare-earth metal complexes featuring a tridentate carbon-linked amido-indenyl ligand have been synthesized and used to catalyze the intramolecular olefin hydroamination.
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Affiliation(s)
- Zhuo Chai
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
| | - Jiang Chu
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
| | - Yunyi Qi
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
| | - Mujun Tang
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
| | - Jinsong Hou
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
| | - Gaosheng Yang
- Key Laboratory of Functionalized Molecular Solids
- Ministry of Education
- Anhui Laboratory of Molecule-Based Materials
- Institute of Organic Chemistry
- College of Chemistry and Materials Science
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7
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Hošnová H, Novák M, Dostál L, Růžičková Z, Jambor R. Hydrosilylation in imino-substituded N- or C-monoanionic ligands. Inorganica Chim Acta 2016. [DOI: 10.1016/j.ica.2016.07.042] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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9
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Kan C, Ge J, Ma H. Aluminum methyl, alkoxide and α-alkoxy ester complexes supported by 6,6'-dimethylbiphenyl-bridged salen ligands: synthesis, characterization and catalysis for rac-lactide polymerization. Dalton Trans 2016; 45:6682-95. [PMID: 26974122 DOI: 10.1039/c5dt04633e] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The synthesis and characterization of aluminum alkyl and alkoxide complexes bearing racemic 6,6'-dimethylbiphenyl-bridged salen-type ligands, and their catalysis in the ring-opening polymerization (ROP) of rac-lactide are reported. Reactions of AlMe3 with various amounts of the proligands (6,6'-[(6,6'-dimethyl-[1,1'-biphenyl]-2,2'-diyl)bis(nitrylomethilidyne)]-bis(2-R(1)-4-R(2)-phenol): , R(1) = R(2) = Me; , R(1) = (t)Bu, R(2) = Me; , R(1) = R(2) = cumyl; , R(1) = Br, R(2) = (t)Bu) afforded the corresponding mono- and dinuclear aluminum methyl complexes [AlMe (), Al2Me4 ()]. Aluminum alkoxide complexes AlO(i)Pr (), AlOBn (), and α-alkoxy ester complexes Al(OCMe2CO2Me) (), Al[(S)-OCHMeCO2Me] () were prepared via in situ alcoholysis of the parent aluminum methyl complex with the corresponding alcohols. The molecular structures of mononuclear complexes , dinuclear complex , alkoxide complexes and α-alkoxy ester complexes were established by single-crystal X-ray diffraction studies. Two broad resonances at about 69-70 ppm and 25-41 ppm were observed in the (27)Al NMR spectra of complexes and , indicating the existence of both four- and five-coordinate aluminum centers in solution, which results from the dissociation of one N donor of the salen ligand, accompanied by an association and dissociation equilibrium of the carbonyl group of the α-alkoxy ester ligand to the aluminum center. Complex is also a rare example of an O-lactate model complex that mimics the first insertion of l-LA. All complexes were investigated for the ROP of rac-LA at 110 °C in toluene. The polymerization initiated by complexes in the presence of (i)PrOH showed living features, affording PLAs with narrow molecular weight distributions (PDIs = 1.03-1.05) and 65-73% isotacticities. Particularly, complex showed an "immortal" behavior for the polymerization of rac-LA in the presence of excess alcohol. Compared with the mononuclear counterparts, the tetra-coordinate dinuclear aluminum complexes enabled a few fold boosts in activity, but gave atactic PLAs with broadened PDIs.
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Affiliation(s)
- Chao Kan
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China.
| | - Jilei Ge
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China.
| | - Haiyan Ma
- Shanghai Key Laboratory of Functional Materials Chemistry and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People's Republic of China.
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10
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Witteman L, Evers T, Shu Z, Lutz M, Klein Gebbink RJM, Moret ME. Hydrosilylation in Aryliminopyrrolide-Substituted Silanes. Chemistry 2016; 22:6087-99. [PMID: 26962007 DOI: 10.1002/chem.201505033] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Indexed: 11/09/2022]
Abstract
A range of silanes was synthesized by the reaction of HSiCl3 with iminopyrrole derivatives in the presence of NEt3 . In certain cases, intramolecular hydrosilylation converts the imine ligand into an amino substituent. This reaction is inhibited by factors such as electron-donating substitution on Si and steric bulk. The monosubstituted ((Dipp) IMP)SiHMeCl ((Dipp) IMP=2-[N-(2,6-diisopropylphenyl)iminomethyl]pyrrolide), is stable towards hydrosilylation, but slow hydrosilylation is observed for ((Dipp) IMP)SiHCl2 . Reaction of two equivalents of (Dipp) IMPH with HSiCl3 results in the hydrosilylation product ((Dipp) AMP)((Dipp) IMP)SiCl ((Dipp) AMP=2-[N-(2,6-diisopropylphenyl)aminomethylene]pyrrolide), but the trisubsitituted ((Dipp) IMP)3 SiH is stable. Monitoring the hydrosilylation reaction of ((Dipp) IMP)SiHCl2 reveals a reactive pathway involving ligand redistribution reactions to form the disubstituted ((Dipp) AMP)((Dipp) IMP)SiCl as an intermediate. The reaction is strongly accelerated in the presence of chloride anions.
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Affiliation(s)
- Léon Witteman
- Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Tim Evers
- Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Zhan Shu
- Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Martin Lutz
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH, Utrecht, The Netherlands
| | - Robertus J M Klein Gebbink
- Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands
| | - Marc-Etienne Moret
- Department of Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG, Utrecht, The Netherlands.
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11
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Zitz R, Hlina J, Gatterer K, Marschner C, Szilvási T, Baumgartner J. Neutral "Cp-Free" Silyl-Lanthanide(II) Complexes: Synthesis, Structure, and Bonding Analysis. Inorg Chem 2015; 54:7065-72. [PMID: 26132550 PMCID: PMC4510641 DOI: 10.1021/acs.inorgchem.5b01072] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
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Complexes featuring lanthanide silicon
bonds represent a research area still in its infancy. Herein, we report
a series of Cp-free lanthanide (+II) complexes bearing σ-bonded
silyl ligands. By reactions of LnI2 (Ln = Yb, Eu, Sm) either
with a 1,4-oligosilanyl dianion [K-Si(SiMe3)2SiMe2SiMe2Si(SiMe3)2-K)] (1) or with 2 (Me3Si)3SiK (3) the corresponding neutral metallacyclopentasilanes
({Me2Si(Me3Si)2Si}2)Ln·(THF)4 (Ln = Yb (2a), Eu (2b), Sm (2c)), or the disilylated complexes ({Me3Si}3Si)2Ln·(THF)3 (Ln = Yb (4a), Eu (4b), Sm (4c)), were selectively
obtained. Complexes 2b, 2c, 4b, and 4c represent the first examples of structurally
characterized Cp-free Eu and Sm complexes with silyl ligands. In both
series, a linear correlation was observed between the Ln–Si
bond lengths and the covalent radii of the corresponding lanthanide
metals. Density functional theory calculations were also carried out
for complexes 2a–c and 4a–c to elucidate the bonding situation between
the Ln(+II) centers and Si. By reactions of
LnI2 (Ln = Yb, Eu, Sm) with oligosilanyl anions or dianions,
either neutral disilylated complexes or metallacyclopentasilanes were
obtained.
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Affiliation(s)
- Rainer Zitz
- †Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Johann Hlina
- ‡Institut für Chemie, Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Karl Gatterer
- §Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Christoph Marschner
- †Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Tibor Szilvási
- ∥Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics (BUTE), Szent Gellért tér 4, 1111 Budapest, Hungary
| | - Judith Baumgartner
- ‡Institut für Chemie, Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
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12
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ANGA SRINIVAS, REJ SUPRIYA, NAKTODE KISHOR, PAL TIGMANSU, PANDA TARUNK. Syntheses and solid state structures of zinc (II) complexes with Bi-dentate N-(Aryl)imino-acenapthenone (Ar-BIAO) ligands. J CHEM SCI 2015. [DOI: 10.1007/s12039-014-0756-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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13
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Das K, Nandi S, Mondal S, Askun T, Cantürk Z, Celikboyun P, Massera C, Garribba E, Datta A, Sinha C, Akitsu T. Triply phenoxo bridged Eu(iii) and Sm(iii) complexes with 2,6-diformyl-4-methylphenol-di(benzoylhydrazone): structure, spectra and biological study in human cell lines. NEW J CHEM 2015. [DOI: 10.1039/c4nj01464b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two dinuclear lanthanide(iii) complexes, [M2(HL)3] (M = Sm(iii) (1), Eu(iii) (2); H3L, 2,6-diformyl-4-methylphenol-di(benzoylhydrazone)) were generated with good yield and characterised systematically.
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14
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Hänninen MM, Zamora MT, Hayes PG. Rare Earth Pincer Complexes: Synthesis, Reaction Chemistry, and Catalysis. TOP ORGANOMETAL CHEM 2015. [DOI: 10.1007/3418_2015_120] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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15
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Wang F, Wei Y, Wang S, Zhu X, Zhou S, Yang G, Gu X, Zhang G, Mu X. Synthesis, Characterization, and Reactivity of Lanthanide Amides Incorporating Neutral Pyrrole Ligand. Isolation and Characterization of Active Catalyst for Cyanosilylation of Ketones. Organometallics 2014. [DOI: 10.1021/om500924q] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fenhua Wang
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
- College
of Biological and Chemical Engineering, Anhui Polytechnic University, Wuhu, Anhui 241000, P. R. China
| | - Yun Wei
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Shaowu Wang
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, P. R. China
| | - Xiancui Zhu
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Shuangliu Zhou
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Gaosheng Yang
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Xiaoxia Gu
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Guangchao Zhang
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
| | - Xiaolong Mu
- Laboratory
of Functional Molecular Solids, Ministry of Education, Anhui Laboratory
of Molecule-Based Materials, Institute of Organic Chemistry, School
of Chemistry and Materials Science, Anhui Normal University, Wuhu, Anhui 241000, P. R. China
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16
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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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17
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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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18
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Jiang Y, Zhu X, Chen M, Wang Y, Yao Y, Wu B, Shen Q. Synthesis and Structural Characterization of Mixed-Valent Ytterbium and Europium Complexes Supported by a Phenoxy(quinolinyl)amide Ligand. Organometallics 2014. [DOI: 10.1021/om5000198] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yinyin Jiang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Xi Zhu
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Muzi Chen
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Yaorong Wang
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Yingming Yao
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Bing Wu
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
| | - Qi Shen
- Key Laboratory of Organic
Synthesis of Jiangsu Province, College of Chemistry, Chemical Engineering
and Materials Science, Soochow University, Suzhou 215123, People’s Republic of China
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19
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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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20
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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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21
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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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22
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Chai Z, Hua D, Li K, Chu J, Yang G. A novel chiral yttrium complex with a tridentate linked amido-indenyl ligand for intramolecular hydroamination. Chem Commun (Camb) 2014; 50:177-9. [DOI: 10.1039/c3cc47006g] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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23
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Yi W, Ma H. Magnesium and Calcium Complexes Containing Biphenyl-Based Tridentate Iminophenolate Ligands for Ring-Opening Polymerization of rac-Lactide. Inorg Chem 2013; 52:11821-35. [DOI: 10.1021/ic4012668] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Wei Yi
- Shanghai Key Laboratory of Functional Materials Chemistry
and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Repulbic of China
| | - Haiyan Ma
- Shanghai Key Laboratory of Functional Materials Chemistry
and Laboratory of Organometallic Chemistry, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, People’s Repulbic of China
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24
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Chen L, Zhao N, Wang Q, Hou G, Song H, Zi G. Synthesis, structure, and catalytic activity of titanium complexes with chiral biaryl Schiff-base ligands. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2013.04.008] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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25
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Manna K, Everett WC, Schoendorff G, Ellern A, Windus TL, Sadow AD. Highly enantioselective zirconium-catalyzed cyclization of aminoalkenes. J Am Chem Soc 2013; 135:7235-50. [PMID: 23631736 DOI: 10.1021/ja4000189] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Aminoalkenes are catalytically cyclized in the presence of cyclopentadienylbis(oxazolinyl)borato group 4 complexes {PhB(C5H4)(Ox(R))2}M(NMe2)2 (M = Ti, Zr, Hf; Ox(R) = 4,4-dimethyl-2-oxazoline, 4S-isopropyl-5,5-dimethyl-2-oxazoline, 4S-tert-butyl-2-oxazoline) at room temperature and below, affording five-, six-, and seven-membered N-heterocyclic amines with enantiomeric excesses of >90% in many cases and up to 99%. Mechanistic investigations of this highly selective system employed synthetic tests, kinetics, and stereochemistry. Secondary aminopentene cyclizations require a primary amine (1-2 equiv vs catalyst). Aminoalkenes are unchanged in the presence of a zirconium monoamido complex {PhB(C5H4)(Ox(4S-iPr,Me2))2}Zr(NMe2)Cl or a cyclopentadienylmono(oxazolinyl)borato zirconium diamide {Ph2B(C5H4)(Ox(4S-iPr,Me2))}Zr(NMe2)2. Plots of initial rate versus [substrate] show a rate dependence that evolves from first-order at low concentration to zero-order at high concentration, and this is consistent with a reversible substrate-catalyst interaction preceding an irreversible step. Primary kinetic isotope effects from substrate conversion measurements (k'obs((H))/k'obs((D)) = 3.3 ± 0.3) and from initial rate analysis (k2((H))/k2((D)) = 2.3 ± 0.4) indicate that a N-H bond is broken in the turnover-limiting and irreversible step of the catalytic cycle. Asymmetric hydroamination/cyclization of N-deutero-aminoalkenes provides products with higher optical purities than obtained with N-proteo-aminoalkenes. Transition state theory, applied to the rate constant k2 that characterizes the irreversible step, provides activation parameters consistent with a highly organized transition state (ΔS(++) = -43(7) cal·mol(-1) K(-1)) and a remarkably low enthalpic barrier (ΔH(++) = 6.7(2) kcal·mol(-1)). A six-centered, concerted transition state for C-N and C-H bond formation and N-H bond cleavage involving two amidoalkene ligands is proposed as most consistent with the current data.
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Affiliation(s)
- Kuntal Manna
- Department of Chemistry and U.S. Department of Energy Ames Laboratory, Iowa State University, Ames, Iowa 50011, USA
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26
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Synthesis, structure, and catalytic activity of nickel complexes with new chiral binaphthyl-based NHC-ligands. J Organomet Chem 2013. [DOI: 10.1016/j.jorganchem.2013.01.020] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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28
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Reznichenko AL, Hultzsch KC. C1-Symmetric Rare-Earth-Metal Aminodiolate Complexes for Intra- and Intermolecular Asymmetric Hydroamination of Alkenes. Organometallics 2013. [DOI: 10.1021/om3010614] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander L. Reznichenko
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
| | - Kai C. Hultzsch
- Department of Chemistry & Chemical Biology, Rutgers, The State University of New Jersey, 610 Taylor Road, Piscataway, New Jersey 08854-8087, United States
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29
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30
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Xie W, Hu H, Cui C. [(NHC)Yb{N(SiMe3)2}2]-Catalyzed Cross-Dehydrogenative Coupling of Silanes with Amines. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201205317] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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31
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Xie W, Hu H, Cui C. [(NHC)Yb{N(SiMe3)2}2]-Catalyzed Cross-Dehydrogenative Coupling of Silanes with Amines. Angew Chem Int Ed Engl 2012; 51:11141-4. [DOI: 10.1002/anie.201205317] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Indexed: 11/08/2022]
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32
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Farnaby JH, Fang M, Ziller JW, Evans WJ. Expanding Yttrium Bis(trimethylsilylamide) Chemistry Through the Reaction Chemistry of (N2)2–, (N2)3–, and (NO)2– Complexes. Inorg Chem 2012; 51:11168-76. [DOI: 10.1021/ic301778q] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Joy H. Farnaby
- Department
of Chemistry, University of California,
Irvine, California 92697-2025, United States
| | - Ming Fang
- Department
of Chemistry, University of California,
Irvine, California 92697-2025, United States
| | - Joseph W. Ziller
- Department
of Chemistry, University of California,
Irvine, California 92697-2025, United States
| | - William J. Evans
- Department
of Chemistry, University of California,
Irvine, California 92697-2025, United States
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33
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Hayes CE, Platel RH, Schafer LL, Leznoff DB. Diamido-Ether Actinide Complexes as Catalysts for the Intramolecular Hydroamination of Aminoalkenes. Organometallics 2012. [DOI: 10.1021/om300410h] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Cassandra E. Hayes
- Department of Chemistry, Simon
Fraser University, 8888 University Drive, Burnaby, British Columbia
V5A 1S6, Canada
| | - Rachel H. Platel
- Department
of Chemistry, University
of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T
1Z1, Canada
| | - Laurel L. Schafer
- Department
of Chemistry, University
of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T
1Z1, Canada
| | - Daniel B. Leznoff
- Department of Chemistry, Simon
Fraser University, 8888 University Drive, Burnaby, British Columbia
V5A 1S6, Canada
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34
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Synthesis, structure, and catalytic activity of trinuclear zinc complexes with new chiral biaryl-based NO2 ligands. J Organomet Chem 2012. [DOI: 10.1016/j.jorganchem.2012.04.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Webster CL, Bates JE, Fang M, Ziller JW, Furche F, Evans WJ. Density Functional Theory and X-ray Analysis of the Structural Variability in η5,η5,η1-Tris(ring) Rare Earth/Actinide Tetramethylpyrrolyl Complexes, (C5Me5)2M(NC4Me4). Inorg Chem 2012; 52:3565-72. [DOI: 10.1021/ic300905r] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Christopher L. Webster
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Jefferson E. Bates
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Ming Fang
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Joseph W. Ziller
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - Filipp Furche
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
| | - William J. Evans
- Department of Chemistry, University of California, Irvine, California 92697-2025,
United States
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36
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Zhang Y, Yao W, Li H, Mu Y. Rare-Earth-Metal Complexes Supported by New Chiral Tetra-Azane Chelating Ligands: Synthesis, Characterization, and Catalytic Properties for Intramolecular Asymmetric Hydroamination. Organometallics 2012. [DOI: 10.1021/om201286u] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yanyu Zhang
- State Key Laboratory for Supramolecular Structure
and
Materials, School of Chemistry, Jilin University, 2699 Qianjin Street,
Changchun 130012, People’s Republic of China
| | - Wei Yao
- State Key Laboratory for Supramolecular Structure
and
Materials, School of Chemistry, Jilin University, 2699 Qianjin Street,
Changchun 130012, People’s Republic of China
| | - He Li
- State Key Laboratory for Supramolecular Structure
and
Materials, School of Chemistry, Jilin University, 2699 Qianjin Street,
Changchun 130012, People’s Republic of China
| | - Ying Mu
- State Key Laboratory for Supramolecular Structure
and
Materials, School of Chemistry, Jilin University, 2699 Qianjin Street,
Changchun 130012, People’s Republic of China
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37
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Zhang Z, Zhao N, Ren W, Chen L, Song H, Zi G. Synthesis, structure, and catalytic activity of a new zinc complex derived from a chiral hydroxyazetidine ligand. INORG CHEM COMMUN 2012. [DOI: 10.1016/j.inoche.2012.03.015] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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38
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Brinkmann C, Barrett AGM, Hill MS, Procopiou PA. Heavier Alkaline Earth Catalysts for the Intermolecular Hydroamination of Vinylarenes, Dienes, and Alkynes. J Am Chem Soc 2012; 134:2193-207. [DOI: 10.1021/ja209135t] [Citation(s) in RCA: 164] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Christine Brinkmann
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington,
London SW7 2AZ, U.K
| | - Anthony G. M. Barrett
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington,
London SW7 2AZ, U.K
| | - Michael S. Hill
- Department
of Chemistry, University of Bath, Claverton
Down, Bath BA2 7AY, U.K
| | - Panayiotis A. Procopiou
- GlaxoSmithKline Medicines Research Center, Gunnels Wood Road, Stevenage, Hertfordshire
SG1 2NY, U.K
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39
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Sun Y, Wu G, Cen D, Chen Y, Wang L. Synthesis and catalytic activity of heterogeneous rare-earth metal catalysts coordinated with multitopic Schiff-base ligands. Dalton Trans 2012; 41:9682-8. [DOI: 10.1039/c2dt30763d] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Reznichenko AL, Hultzsch KC. Early Transition Metal (Group 3–5, Lanthanides and Actinides) and Main Group Metal (Group 1, 2, and 13) Catalyzed Hydroamination. TOP ORGANOMETAL CHEM 2011. [DOI: 10.1007/3418_2011_22] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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41
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Wang Q, Zhang F, Song H, Zi G. Synthesis, structure, and catalytic activity of organolanthanides with chiral biphenyl-based tridentate amidate ligands. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.11.032] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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42
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Arrowsmith M, Crimmin MR, Barrett AGM, Hill MS, Kociok-Köhn G, Procopiou PA. Cation Charge Density and Precatalyst Selection in Group 2-Catalyzed Aminoalkene Hydroamination. Organometallics 2011. [DOI: 10.1021/om101063m] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Merle Arrowsmith
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | - Mark R. Crimmin
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K
| | - Anthony G. M. Barrett
- Department of Chemistry, Imperial College London, Exhibition Road, South Kensington, London, SW7 2AZ, U.K
| | - Michael S. Hill
- Department of Chemistry, University of Bath, Claverton Down, Bath, BA2 7AY, U.K
| | | | - Panayiotis A. Procopiou
- GlaxoSmithKline Medicines Research Centre, Gunnels Wood Road, Stevenage, Hertfordshire, SG1 2NY, U.K
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43
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Han F, Teng Q, Zhang Y, Wang Y, Shen Q. Influence of Schiff base and lanthanide metals on the synthesis, stability, and reactivity of monoamido lanthanide complexes bearing two Schiff bases. Inorg Chem 2011; 50:2634-43. [PMID: 21319780 DOI: 10.1021/ic102529d] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The monoamido lanthanide complexes stabilized by Schiff base ligand L(2)LnN(TMS)(2) (L = 3,5-Bu(t)(2)-2-(O)-C(6)H(2)CH═N-8-C(9)H(6)N, Ln = Yb (1), Y (2), Eu (3), Nd (4), and La (5)) were synthesized in good yields by the reactions of Ln[N(TMS)(2)](3) with 1.8 equiv of HL in hexane at room temperature. It was found that the stability of 1-5 depends greatly on the size of the lanthanide metals with the increasing trend of Yb ≈ Y < Nd < La. The amine elimination of Ln[N(TMS)(2)](3) with the bulky bidentate Schiff base HL' (L' = 3,5-Bu(t)(2)-2-(O)-C(6)H(2)CH═N-2,6-Pr(i)(2)-C(6)H(3)) afforded the monoamido lanthanide complexes L'(2)LnN(TMS)(2) (Ln = Yb (9), Y (10), Nd (11), and La (12)). While the amine elimination with the less bulky Schiff base HL'' (L'' = 3,5-Bu(t)(2)-2-(O)-C(6)H(2)CH═N-2,6-Me(2)-C(6)H(3)) yielded the desired monoamido complexes with the small metals of Y and Yb, L''(2)LnN(TMS)(2) (Ln = Yb (13) and Y (14)), and the more stable tris-Schiff base complexes with the large metals of La and Nd, yielded L''(3)Ln as the only product. Complexes 1-14 were fully characterized including X-ray crystal structural analysis. Complexes 1-5, 10, and 14 can serve as the efficient catalysts for addition of amines to carbodiimides, and the catalytic activity is greatly affected by the lanthanide metals with the active sequence of Yb < Y < Eu ≈ Nd ≈ La.
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Affiliation(s)
- Fubin Han
- Key Laboratory of Organic Synthesis of Jiangsu Province, Department of Chemistry and Chemical Engineering, Dushu Lake Campus, Soochow University, Suzhou 215123, People's Republic of China
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44
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Spencer J, Baltus CB, Patel H, Press NJ, Callear SK, Male L, Coles SJ. Microwave-mediated synthesis of an arylboronate library. ACS COMBINATORIAL SCIENCE 2011; 13:24-31. [PMID: 21247121 DOI: 10.1021/co100011g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A series of arylboronates has been synthesized from the reaction of 2-(2-, (3-, or (4-(bromomethyl)phenyl)-4,4,5,5-tetramethyl-1,3,2-dioxaborolane 1{1-3} respectively with a range of N-, S-, and O-nucleophiles, using microwave-mediated chemistry. For the synthesis of N- and S-substituted boronates, a supported base, PS-NMM, was employed, and many reactions were complete within 15 min. With O-nucleophiles, a mixture of tetrabutylammonium bromide, potassium carbonate, and sodium hydroxide was employed. The resulting aminomethyl, mercaptomethyl, or alkoxy-/phenoxymethyl-arylboronates were subjected to microwave-mediated Suzuki Miyaura coupling reactions to afford a range of biaryls in moderate to good yields. The X-ray structures of five boronates were determined.
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Affiliation(s)
- John Spencer
- School of Science at Medway, University of Greenwich, Chatham, ME4 4TB, U.K
| | | | - Hiren Patel
- School of Science at Medway, University of Greenwich, Chatham, ME4 4TB, U.K
| | - Neil J. Press
- Novartis Pharmaceuticals U.K., Horsham, Sussex, RH12 5AB, U.K
| | - Samantha K. Callear
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
| | - Louise Male
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
| | - Simon J. Coles
- UK National Crystallography Service, School of Chemistry, University of Southampton, Highfield, Southampton. SO17 1BJ, U.K
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45
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Amidate ligand design effects in zirconium-catalyzed enantioselective hydroamination of aminoalkenes. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.07.023] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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46
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Lu E, Gan W, Chen Y. Monoalkyl and monoanilide yttrium complexes containing tridentate pyridyl-1-azaallyl dianionic ligands. Dalton Trans 2011; 40:2366-74. [DOI: 10.1039/c0dt01539c] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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47
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Zhang H, Chen L, Song H, Zi G. Synthesis, structure, and catalytic activity of chiral silver(I) and copper(II) complexes with biaryl-based nitrogen-containing ligands. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.11.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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48
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Zhang F, Song H, Zi G. Synthesis and catalytic activity of group 5 metal amides with chiral biaryldiamine-based ligands. Dalton Trans 2011; 40:1547-66. [DOI: 10.1039/c0dt01229g] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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49
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Zhang J, Zhou X. Selective insertions of unsaturated organic molecules into the Ln–N or N–H bonds of biscyclopentadienyl lanthanide complexes. Dalton Trans 2011; 40:9637-48. [DOI: 10.1039/c1dt10563a] [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]
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50
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Zi G. Asymmetric hydroamination/cyclization catalyzed by group 4 metal complexes with chiral biaryl-based ligands. J Organomet Chem 2011. [DOI: 10.1016/j.jorganchem.2010.07.034] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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