1
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Liu X, Dai Y, Bao Q, Li Q, Chen N, Su Y, Wang X. Isolable T-Shaped Planar Silyl Anion. Angew Chem Int Ed Engl 2024; 63:e202406089. [PMID: 38781000 DOI: 10.1002/anie.202406089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2024] [Revised: 05/09/2024] [Accepted: 05/23/2024] [Indexed: 05/25/2024]
Abstract
Silyl anions have garnered significant attention due to their synthetic abilities. However, previously reported silyl anions have been limited to either trigonal-pyramidal or trigonal-planar geometries, which confine them primarily as nucleophiles in substitution reactions. Herein, we report the isolation of the unprecedented T-shaped planar silyl anion salt 2 by employment of a geometrically constrained triamido pincer ligand. Theoretical calculations disclosed that the silicon centre in 2 possesses both a lone pair of electrons and an empty 3pz orbital. In addition to nucleophilic substitution reactions with Ph3PAuCl and W(CO)6, 2 readily undergoes oxidative additions with CO2 and 2,6-dimethylphenylisonitrile at room temperature. Furthermore, under mild conditions, compound 2 cleaves Csp2-H, Csp2-H, and H-H bonds in 1,2,4,5-tetrafluorobenzene, an intramolecular iPr group, and dihydrogen, representing the first examples of C-H and H-H activations mediated by a silyl anion, respectively. This work unveils new reactivity of silyl anions owing to the non-classical geometry and electronic structure.
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Affiliation(s)
- Xiaona Liu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Yuyang Dai
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Qidi Bao
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Qianli Li
- School of Chemistry and Chemical Engineering, Liaocheng University, Liaocheng, 252059, China
| | - Ning Chen
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Yuanting Su
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, China
| | - Xinping Wang
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
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2
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Wang X, Feng C, Jiang J, Maeda S, Kubota K, Ito H. Stereospecific synthesis of silicon-stereogenic optically active silylboranes and general synthesis of chiral silyl Anions. Nat Commun 2023; 14:5561. [PMID: 37689789 PMCID: PMC10492825 DOI: 10.1038/s41467-023-41113-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/23/2023] [Indexed: 09/11/2023] Open
Abstract
Silicon-stereogenic optically active silylboranes could potentially allow the formation of chiral silyl nucleophiles as well as the synthesis of various chiral silicon compounds. However, the synthesis of such silicon-stereogenic silylboranes has not been achieved so far. Here, we report the synthesis of silicon-stereogenic optically active silylboranes via a stereospecific Pt(PPh3)4-catalyzed Si-H borylation of chiral hydrosilanes, which are synthesized by stoichiometric and catalytic asymmetric synthesis, in high yield and very high or perfect enantiospecificity (99% es in one case, and >99% es in the others) with retention of the configuration. Furthermore, we report a practical approach to generate silicon-stereogenic silyl nucleophiles with high enantiopurity and configurational stability using MeLi activation. This protocol is suitable for the stereospecific and general synthesis of silicon-stereogenic trialkyl-, dialkylbenzyl-, dialkylaryl-, diarylalkyl-, and alkylary benzyloxy-substituted silylboranes and their corresponding silyl nucleophiles with excellent enantiospecificity (>99% es except one case of 99% es). Transition-metal-catalyzed C-Si bond-forming cross-coupling reactions and conjugate-addition reactions are also demonstrated. The mechanisms underlying the stability and reactivity of such chiral silyl anion were investigated by combining NMR spectroscopy and DFT calculations.
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Affiliation(s)
- Xihong Wang
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
| | - Chi Feng
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan
| | - Julong Jiang
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo, Hokkaido, 060-0815, Japan
| | - Satoshi Maeda
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan
- Department of Chemistry, Faculty of Science, Hokkaido University Sapporo, Hokkaido, 060-0815, Japan
| | - Koji Kubota
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan.
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.
| | - Hajime Ito
- Institute for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo, Hokkaido, 001-0021, Japan.
- Division of Applied Chemistry, Graduate School of Engineering, Hokkaido University, Sapporo, Hokkaido, 060-8628, Japan.
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3
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Tang M, Zhu W, Sun H, Wang J, Jing S, Wang M, Shi Z, Hu J. Facile preparation of organosilanes from benzylboronates and gem-diborylalkanes mediated by KO tBu. Chem Sci 2023; 14:7355-7360. [PMID: 37416710 PMCID: PMC10321478 DOI: 10.1039/d3sc02461j] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/10/2023] [Indexed: 07/08/2023] Open
Abstract
Methods to efficiently synthesize organosilanes are valuable in the fields of synthetic chemistry and materials science. During the past decades, boron conversion has become a generic and powerful approach for constructing carbon-carbon and other carbon-heteroatom bonds, but its potential application in forming carbon-silicon remains unexplored. Herein, we describe an alkoxide base-promoted deborylative silylation of benzylic organoboronates, geminal bis(boronates) or alkyltriboronates, allowing for straightforward access to synthetically valuable organosilanes. This selective deborylative methodology exhibits operational simplicity, broad substrate scope, excellent functional group compatibility and convenient scalability, providing an effective and complementary platform for the generation of diversified benzyl silanes and silylboronates. Detailed experimental results and calculated studies revealed an unusual mechanistic feature of this C-Si bond formation.
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Affiliation(s)
- Man Tang
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Wenyan Zhu
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Huaxing Sun
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Jing Wang
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Su Jing
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
| | - Minyan Wang
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Zhuangzhi Shi
- State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Jiefeng Hu
- School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 China
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4
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Pöcheim A, Zitz R, Hönigsberger J, Marschner C, Baumgartner J. Metallacyclosilanes of Calcium, Yttrium, and Iron. Inorg Chem 2022; 61:17527-17536. [PMID: 36281990 PMCID: PMC9644368 DOI: 10.1021/acs.inorgchem.2c02508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
Utilizing a choice
of α,ω-oligosilanylene diides, it
is possible to synthesize a number of heterocyclosilanes with heteroelements
of calcium, yttrium, and iron by metathesis reactions with respective
metal halides CaI2, YCl3, and FeBr2. 29Si NMR spectroscopic analysis of the calcacyclosilanes
suggests that these compounds retain a strong oligosilanylene dianion
character, which is more pronounced than in the analogous magnesacyclosilanes.
As the electronegativity of calcium lies between potassium and magnesium,
silyl calcium reagents should be considered as building blocks with
an attractive reactivity profile. Reaction of a 1,4-oligosilanylene
diide with YCl3 gave the five-membered yttracyclosilane
as an ate-complex with two chlorides still attached to the yttrium
atom. Reaction of the obtained compound with two equivalents of NaCp
led to another five-membered yttracyclosilane ate-complex with an
yttracene fragment. When using a dianionic oligosilanylene ligand
containing a siloxane unit, the siloxane oxygen acted as an additional
coordination site for Ca and Y. When the same ligand was used to prepare
a cyclic 1-ferra-4-oxatetrasilacyclohexane, an analogous transannular
interaction between the iron and oxygen atoms is missing. Reactions of some α,ω-oligosilanylene
diides
with CaI2, YCl3, and FeBr2 allow
convenient access to metallocyclosilanes with Ca, Y, and Fe as heteroatoms.
The calcium and yttrium compounds resemble previously prepared magnesacyclosilanes,
retaining a strong silanide character. The only related compounds
to the described ferracyclosilanes are acyclic examples.
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Affiliation(s)
- Alexander Pöcheim
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Rainer Zitz
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Julia Hönigsberger
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Christoph Marschner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
| | - Judith Baumgartner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, 8010 Graz, Austria
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5
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Oestreich M, Yoshida H, Kamio S, Imagawa T, Nakamoto M. HMPA-Free Generation of Trialkylsilyllithium Reagents and Its Applications to the Synthesis of Silylboronic Esters. SYNTHESIS-STUTTGART 2021. [DOI: 10.1055/a-1558-9135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractTrialkylsilyllithium species have turned out to be facilely generated by treating hexaalkyldisilanes with methyllithium in the presence of tris(N,N-tetramethylene)phosphoric triamide (TPPA) as an activator, which can be trapped by boron electrophiles to afford silylboronic esters including long-awaited Me3Si–B(pin).
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Affiliation(s)
| | - Hiroto Yoshida
- Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Shintaro Kamio
- Graduate School of Advanced Science and Engineering, Hiroshima University
- Institut für Chemie, Technische Universität Berlin
| | - Taiki Imagawa
- Graduate School of Advanced Science and Engineering, Hiroshima University
| | - Masaaki Nakamoto
- Graduate School of Advanced Science and Engineering, Hiroshima University
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6
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Matsuo T, Yamaguchi T, Hirohata T, Nakamoto M, Yamamoto Y, Maeda Y, Kawachi A. Synthesis of Alkoxy‐Substituted Oligosilanes using [
β
‐(Alkoxy)disilanyl]lithium. Eur J Inorg Chem 2021. [DOI: 10.1002/ejic.202100668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Takumi Matsuo
- Major in Applied Chemistry Graduate School of Science and Engineering Hosei University 3-7-2 Kajino-cho Koganei Tokyo 184-8584 Japan
| | - Tatsuya Yamaguchi
- Major in Applied Chemistry Graduate School of Science and Engineering Hosei University 3-7-2 Kajino-cho Koganei Tokyo 184-8584 Japan
| | - Tomoki Hirohata
- Department of Chemical Science and Technology Faculty of Bioscience and Applied Chemistry Hosei University 3-7-2 Kajino-cho Koganei Tokyo 184-8584 Japan
| | - Masaaki Nakamoto
- Basic Chemistry Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi Hiroshima 739-8526 Japan
| | - Yohsuke Yamamoto
- Basic Chemistry Program Graduate School of Advanced Science and Engineering Hiroshima University 1-3-1 Kagamiyama Higashi Hiroshima 739-8526 Japan
| | - Yutaka Maeda
- Department of Chemistry Tokyo Gakugei University 4-1-1 Nukuikita-machi Koganei Tokyo 184-8501 Japan
| | - Atsushi Kawachi
- Department of Chemical Science and Technology Faculty of Bioscience and Applied Chemistry Hosei University 3-7-2 Kajino-cho Koganei Tokyo 184-8584 Japan
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7
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Schödel F, Bolte M, Wagner M, Lerner H. NHC Supersilyl Silver Complex [Ag(IPr)Si
t
Bu
3
] as a Promising Agent for Substitution Reactions. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.201900304] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Frauke Schödel
- Institut für Anorganische Chemie Goethe‐Universität Max‐von‐Laue‐Str. 7 60438 Frankfurt am Main Germany
| | - Michael Bolte
- Institut für Anorganische Chemie Goethe‐Universität Max‐von‐Laue‐Str. 7 60438 Frankfurt am Main Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie Goethe‐Universität Max‐von‐Laue‐Str. 7 60438 Frankfurt am Main Germany
| | - Hans‐Wolfram Lerner
- Institut für Anorganische Chemie Goethe‐Universität Max‐von‐Laue‐Str. 7 60438 Frankfurt am Main Germany
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8
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Marro EA, Folster CP, Press EM, Im H, Ferguson JT, Siegler MA, Klausen RS. Stereocontrolled Syntheses of Functionalized cis- and trans-Siladecalins. J Am Chem Soc 2019; 141:17926-17936. [PMID: 31600060 DOI: 10.1021/jacs.9b09902] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the synthesis of both diastereomers of an all-silicon analog of decalin. Carbocyclic decalin is a ubiquitous bicyclic structural motif. The siladecalin synthesis provides materials functionalized with either Si-Ph or Si-H groups, versatile entry points for further chemical diversification. The synthesis of silicon-stereogenic silanes is significantly less precedented than the synthesis of asymmetric carbon centers, and strategies for control of relative stereochemistry in oligosilanes are hardly described. This study offers insights of potential generality, such as the epimerization of the cis-isomer to the thermodynamically downhill trans-isomer via a hypothesized pentavalent intermediate. Decalin is a classic example in the conformational analysis of organic ring systems, and the carbocyclic diastereomers have highly divergent conformational profiles. Like the carbocycle, we observe different conformational properties in cis- and trans-siladecalins with consequences for NMR spectroscopy, optical properties, and vibrational spectroscopy. This study showcases the utility of targeted synthesis for preparing complex and functionalized polycyclic silanes.
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Affiliation(s)
- Eric A Marro
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Carlton P Folster
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Eric M Press
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Hoyeon Im
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - John T Ferguson
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Maxime A Siegler
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
| | - Rebekka S Klausen
- Department of Chemistry , Johns Hopkins University , 3400 North Charles Street , Baltimore , Maryland 21218 , United States
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9
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Balatoni I, Hlina J, Zitz R, Pöcheim A, Baumgartner J, Marschner C. β-Amino- and Alkoxy-Substituted Disilanides. Molecules 2019; 24:E3823. [PMID: 31652810 PMCID: PMC6864825 DOI: 10.3390/molecules24213823] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 10/17/2019] [Accepted: 10/20/2019] [Indexed: 11/16/2022] Open
Abstract
Our recent study on formal halide adducts of disilenes led to the investigation of the synthesis and properties of β-fluoro- and chlorodisilanides. The reaction of the functionalized neopentasilanes (Me3Si)3SiSiPh2NEt2 and (Me3Si)3SiSiMe2OMe with KOtBu in the presence of 18-crown-6 provided access to structurally related β-alkoxy- and amino-substituted disilanides. The obtained Et2NPh2Si(Me3Si)2SiK·18-crown-6 was converted to a magnesium silanide and further on to Et2NPh2Si(Me3Si)2Si-substituted ziroconocene and hafnocene chlorides. In addition, an example of a silanide containing both Et2NPh2Si and FPh2Si groups was prepared with moderate selectivity. Also, the analogous germanide Et2NPh2Si(Me3Si)2GeK·18-crown-6 could be obtained.
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Affiliation(s)
- Istvan Balatoni
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
| | - Johann Hlina
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
| | - Rainer Zitz
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
| | - Alexander Pöcheim
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
| | - Judith Baumgartner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
| | - Christoph Marschner
- Institut für Anorganische Chemie, Technische Universität Graz, Stremayrgasse 9, A-8010 Graz, Austria.
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10
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Balatoni I, Hlina J, Zitz R, Pöcheim A, Baumgartner J, Marschner C. Disilene Fluoride Adducts versus β-Halooligosilanides. Inorg Chem 2019; 58:14185-14192. [PMID: 31580645 DOI: 10.1021/acs.inorgchem.9b02223] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Extending the chemistry of disilene fluoride adducts studied earlier by us, we investigated the formation of 1,1-bis(trimethylsilyl)fluorodiphenylsilylsilanide, which was prepared by reaction of (Me3Si)3SiSiPh2F with KOtBu. The formed FPh2SiSi(Me3Si)2K displays distinctively different structural and spectroscopic features compared to the earlier reported F(Me3Si)2SiSi(SiMe3)2K. While the latter eliminates metal fluoride upon reaction with MgBr2, the respective magnesium silanide is formed from FPh2SiSi(Me3Si)2K. Reaction of (Me3Si)3SiSiPh2Cl with KOtBu proceeded similarly, but the formed ClPh2SiSi(Me3Si)2K easily undergoes potassium chloride elimination to the disilene Ph2Si═Si(SiMe3)2. Compared to F(Me3Si)2SiSi(SiMe3)2K, which can be regarded as a disilene fluoride adduct, structural, spectroscopic, and reactivity properties of FPh2SiSi(Me3Si)2K distinguish it as a β-fluorodisilanide.
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Affiliation(s)
- Istvan Balatoni
- 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
| | - Rainer Zitz
- Institut für Anorganische Chemie , Technische Universität Graz , Stremayrgasse 9 , 8010 Graz , Austria
| | - Alexander Pöcheim
- Institut für Anorganische Chemie , Technische Universität Graz , Stremayrgasse 9 , 8010 Graz , Austria
| | - Judith Baumgartner
- Institut für Anorganische Chemie , Technische Universität Graz , Stremayrgasse 9 , 8010 Graz , Austria
| | - Christoph Marschner
- Institut für Anorganische Chemie , Technische Universität Graz , Stremayrgasse 9 , 8010 Graz , Austria
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11
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Haas M, Knoechl A, Wiesner T, Torvisco A, Fischer R, Jones C. Attempted Synthesis of a Homocyclic Bis(silyl)silylene Leads to the Formation of a Tricyclo[3,1,1,12,4]octasilane. Organometallics 2019. [DOI: 10.1021/acs.organomet.9b00507] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Michael Haas
- School of Chemistry, Monash University, P.O. Box 23, Melbourne, Victoria 3800, Australia
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz A-8010, Austria
| | - Andreas Knoechl
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz A-8010, Austria
| | - Tanja Wiesner
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz A-8010, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz A-8010, Austria
| | - Roland Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz A-8010, Austria
| | - Cameron Jones
- School of Chemistry, Monash University, P.O. Box 23, Melbourne, Victoria 3800, Australia
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12
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Scott CN, Bisen MD. Synthesis of reactively functionalized 2,5-siloles using kumada-type nickel-mediated intramolecular cyclization and their utilization in polymer synthesis. POLYMER 2019. [DOI: 10.1016/j.polymer.2019.03.022] [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]
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13
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Alig E, Georg I, Sänger I, Fink L, Wagner M, Lerner HW. Synthesis and structure of the donor-free potassium silanide K[SiPh 3]. ZEITSCHRIFT FUR NATURFORSCHUNG SECTION B-A JOURNAL OF CHEMICAL SCIENCES 2019. [DOI: 10.1515/znb-2018-0254] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe donor-free potassium silanide K[SiPh3] was prepared by the reaction of hexaphenyldisilane, Ph3Si–SiPh3, with potassium metal in benzene at room temperature. The solid-state structure, determined by powder X-ray diffraction consists of {K[SiPh3]}2units, which interact with adjacent dimers to form an infinite chain along the crystallographiccaxis (orthorhombic, space groupCmc21,Z=4). The structure features short contacts between the π system of the phenyl rings and the potassium atoms of neighbouring K[SiPh3] units.
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Affiliation(s)
- Edith Alig
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , 60438 Frankfurt am Main , Germany
| | - Isabelle Georg
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , 60438 Frankfurt am Main , Germany
| | - Inge Sänger
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , 60438 Frankfurt am Main , Germany
| | - Lothar Fink
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , 60438 Frankfurt am Main , Germany
| | - Matthias Wagner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , 60438 Frankfurt am Main , Germany
| | - Hans-Wolfram Lerner
- Institut für Anorganische Chemie, Goethe-Universität Frankfurt am Main , Max-von-Laue-Straße 7 , 60438 Frankfurt am Main , Germany , Fax: +49-69-79876329151
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14
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Affiliation(s)
- Susanne Bähr
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Weichao Xue
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
| | - Martin Oestreich
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 115, 10623 Berlin, Germany
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15
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Witteman L, Lutz M, Moret ME. Synthesis of N-Heterocycle Substituted Silyl Ligands within the Coordination Sphere of Iron. Organometallics 2018; 37:3024-3034. [PMID: 30270963 PMCID: PMC6158677 DOI: 10.1021/acs.organomet.8b00399] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Indexed: 11/28/2022]
Abstract
N-Heterocycle-substituted silyl iron complexes have been synthesized by nucleophilic substitution at trichlorosilyl ligands bound to iron. The homoleptic (tripyrrolyl)- and tris(3-methylindolyl)silyl groups were accessed from (Cl3Si)CpFe(CO)2 (Cl3SiFp) by substitution of chloride with pyrrolide or 3-methylindolide, respectively. Analogously, nucleophilic substitution of Cl with pyrrolide on the anionic Fe(0) synthon Cl3SiFe(CO)4 - generates the (tripyrrolyl)silyl ligand, bound to the iron tetracarbonyl fragment. The bulkier 2-mesitylpyrrolide substitutes a maximum of 2 chlorides on Cl3SiFp under the same conditions. The tridentate, trianionic nucleophile tmim (tmimH3 = tris(3-methylindol-2-yl)methane) proves reluctant to perform the substitution in a straightforward manner; instead, ring-opening and incorporation of THF occurs to form the tris-THF adduct tmim(C4H8O)3SiFe(CO)4 -. The bidentate, monoanionic nucleophile 2-(dipp-iminomethyl)pyrrolide (DippIMP, dipp = 2,6-diisopropylphenyl) shows chloride displacement and addition of a second DippIMP moiety on the imine backbone. The heterocycle-based silyl ligands were shown to be sterically and electronically tunable, moderately electron-donating ligands. The presented approach to new silyl ligands avoids strongly reducing conditions and potentially reactive hydrosilane intermediates.
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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
| | - Martin Lutz
- Crystal and Structural Chemistry, Bijvoet Center for Biomolecular Research, Faculty of Science, Utrecht University, Padualaan 8, 3584 CH 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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16
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Xue W, Shishido R, Oestreich M. Stabile Stammlösungen von Silicium-Grignard-Reagenzien: Anwendung in eisen- und cobaltkatalysierten radikalischen C(sp3
)-Si-Kreuzkupplungsreaktionen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201807640] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Weichao Xue
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 115 10623 Berlin Deutschland
| | - Ryosuke Shishido
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 115 10623 Berlin Deutschland
| | - Martin Oestreich
- Institut für Chemie; Technische Universität Berlin; Straße des 17. Juni 115 10623 Berlin Deutschland
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17
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Xue W, Shishido R, Oestreich M. Bench-Stable Stock Solutions of Silicon Grignard Reagents: Application to Iron- and Cobalt-Catalyzed Radical C(sp3
)-Si Cross-Coupling Reactions. Angew Chem Int Ed Engl 2018; 57:12141-12145. [DOI: 10.1002/anie.201807640] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2018] [Indexed: 01/15/2023]
Affiliation(s)
- Weichao Xue
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 115 10623 Berlin Germany
| | - Ryosuke Shishido
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 115 10623 Berlin Germany
| | - Martin Oestreich
- Institut für Chemie; Technische Universität Berlin; Strasse des 17. Juni 115 10623 Berlin Germany
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18
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Mukherjee D, Höllerhage T, Leich V, Spaniol TP, Englert U, Maron L, Okuda J. The Nature of the Heavy Alkaline Earth Metal–Hydrogen Bond: Synthesis, Structure, and Reactivity of a Cationic Strontium Hydride Cluster. J Am Chem Soc 2018; 140:3403-3411. [PMID: 29412655 DOI: 10.1021/jacs.7b13796] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Debabrata Mukherjee
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
| | - Thomas Höllerhage
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
| | - Valeri Leich
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
| | - Ulli Englert
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
| | - Laurent Maron
- Université
de Toulouse et CNRS, INSA, UPS, CNRS, UMR 5215 LPCNO, 135 avenue de Rangueil, 31077 Toulouse, France
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, Aachen 52056, Germany
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19
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Thalangamaarachchige VD, Li H, Cordes DB, Unruh DK, Krempner C. Zwitterionic Alkali-Metal Silanides of Tripodal Ligand Geometry: Synthesis, Structure, and Lewis Acid–Base Chemistry. Inorg Chem 2017; 56:9869-9879. [DOI: 10.1021/acs.inorgchem.7b01227] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | - Hui Li
- Department of Chemistry & Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
| | - David B. Cordes
- Department of Chemistry & Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
| | - Daniel K. Unruh
- Department of Chemistry & Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
| | - Clemens Krempner
- Department of Chemistry & Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
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20
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Luo J, Yan EH, Zhao H, Xiao XQ, Li Z. Synthesis, structure and reactivity of sterically demanding oligosilanylmagnesium compounds. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.09.058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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21
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Thalangamaarachchige VD, Unruh DK, Cordes DB, Krempner C. Synthesis, structure, and reactivity of zwitterionic divalent rare-earth metal silanides. Inorg Chem 2015; 54:4189-91. [PMID: 25900430 DOI: 10.1021/acs.inorgchem.5b00542] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis and structures of the first zwitterionic divalent rare-earth metal silanides of the formula [Si(SiMe2OMe)3-κ(3)]2M (M-3), where M = Eu, Yb, and Sm, are reported. M-3 compounds feature spirocyclic bicyclooctane structures in which the central rare-earth metal ions are being octahedrally coordinated by six methoxy groups. The reaction of Yb-3 with BPh3 and W(CO)6 respectively generated the trinuclear zwitterions [Ph3BSi(SiMe2OMe)3-κ(3)]2Yb (Yb-4) and [(CO)5WSi(SiMe2OMe)3-κ(3)]2Yb (Yb-5) in good yield.
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Affiliation(s)
- Vidura D Thalangamaarachchige
- †Department of Chemistry and Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
| | - Daniel K Unruh
- †Department of Chemistry and Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
| | - David B Cordes
- ‡School of Chemistry, University of St. Andrews, North Haugh, St. Andrews, Fife KY16 9ST, United Kingdom
| | - Clemens Krempner
- †Department of Chemistry and Biochemistry, Texas Tech University, Box 1061, Lubbock, Texas 79409-1061, United States
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22
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Lee VY, Sekiguchi A. 1,1-Dilithiosilanes, 1,1-dilithiogermanes, 1,1-dilithiostannanes and related compounds: Organometallic reagents of the new generation. MENDELEEV COMMUNICATIONS 2015. [DOI: 10.1016/j.mencom.2015.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Leich V, Spaniol TP, Okuda J. Formation of a Cationic Calcium Hydride Cluster with a “Naked” Triphenylsilyl Anion by Hydrogenolysis of Bis(triphenylsilyl)calcium. Inorg Chem 2015; 54:4927-33. [DOI: 10.1021/acs.inorgchem.5b00527] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Valeri Leich
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52056 Aachen, Germany
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24
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Kano N, Miyake H, Sasaki K, Kawashima T. Oxidative Bond Cleavage of the Silicon-Silicon Bond of a Pentacoordinated Disilicate. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Naokazu Kano
- Department of Chemistry; Graduate School of Science; The University of Tokyo; Tokyo 113-0033 Japan
| | - Hideaki Miyake
- Department of Chemistry; Graduate School of Science; The University of Tokyo; Tokyo 113-0033 Japan
| | - Keishi Sasaki
- Department of Chemistry; Graduate School of Science; The University of Tokyo; Tokyo 113-0033 Japan
| | - Takayuki Kawashima
- Department of Chemistry; Graduate School of Science; The University of Tokyo; Tokyo 113-0033 Japan
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25
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Haas M, Fischer R, Flock M, Mueller S, Rausch M, Saf R, Torvisco A, Stueger H. Stable Silenolates and Brook-Type Silenes with Exocyclic Structures. Organometallics 2014; 33:5956-5959. [PMID: 25400314 PMCID: PMC4228504 DOI: 10.1021/om500935r] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Indexed: 12/01/2022]
Abstract
![]()
The
first silenolates with exocyclic structures [(Me3Si)2Si(Si2Me4)2SiC(R)O]−K+ (2a: R = 1-adamantyl; 2b:
mesityl; 2c: o-tolyl) were
synthesized by the reaction of the corresponding acylcyclohexasilanes 1a–c with KOtBu. NMR
spectroscopy and single-crystal X-ray diffraction analysis suggest
that the aryl-substituted silenolates 2b,c exhibit increased character of functionalized silenes as compared
to the alkyl-substituted derivative 2a due to the different
coordination of the K+ counterion to the SiC(R)O moiety. 2b,c, thus, reacted with ClSiiPr3 to give the exocyclic silenes (Me3Si)2Si(Si2Me4)2Si=C(OSiiPr3)R (3b: R = Mes; 3c: o-Tol), while 2a afforded the Si-silylated
acylcyclohexasilane 1d. The thermally remarkably stable
compound 3b, which is the first isolated silene with
the sp2 silicon atom incorporated into a cyclopolysilane
framework, could be fully characterized structurally and spectroscopically.
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Affiliation(s)
- Michael Haas
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Roland Fischer
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Michaela Flock
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Stefan Mueller
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Martin Rausch
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Robert Saf
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry and Institute for Chemistry and Technology of Materials, Graz University of Technology , Stremayrgasse 9, A-8010 Graz, Austria
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26
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Allan KM, Spencer JL. Synthesis and characterisation of novel o-xylene-based P,E ligands. Org Biomol Chem 2014; 12:956-64. [PMID: 24363027 DOI: 10.1039/c3ob42244e] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A range of novel hybrid ligands of the type, o-C6H4(CH2PBu(t)2)(CH2E) (E = P(C6F5)2, SBu(t), SPh, S(O)Bu(t), NR2, SiPh2H), have been synthesised in two or three steps from the common substrate, o-C6H4{CH2PBu(t)2(BH3)}(CH2Cl). The initial step involved treatment of the substrate with the appropriate nucleophilic reagent, or preparation of a Grignard reagent from o-C6H4{CH2PBu(t)2(BH3)}(CH2Cl) and reaction with the appropriate electrophile. In most cases, this versatile strategy produced air-stable crystalline ligand precursors. Phosphine deprotection was achieved via one of three methods, dependent upon the properties of the second functional group. An alternative synthesis of the known ligand, o-C6H4(CH2PBu(t)2)(CH2PPh2), is also presented.
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Affiliation(s)
- Kathryn M Allan
- School of Chemical and Physical Sciences, Victoria University of Wellington, Wellington, New Zealand.
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27
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Leich V, Lamberts K, Spaniol TP, Okuda J. Crown ether adducts of light alkali metal triphenylsilyls: synthesis, structure and hydrosilylation catalysis. Dalton Trans 2014; 43:14315-21. [PMID: 24870359 DOI: 10.1039/c4dt00916a] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Alkali metal triphenylsilyls [Li(12-crown-4)SiPh3]·(thf)0.5, [Na(15-crown-5)SiPh3]·(thf)0.5 and [K(18-crown-6)SiPh3(thf)] were synthesized using 1,1,1-trimethyl-2,2,2-triphenyldisilane and shown to catalyze the regioselective hydrosilylation of 1,1-diphenylethene.
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Affiliation(s)
- Valeri Leich
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52056 Aachen, Germany
| | - Kevin Lamberts
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52056 Aachen, Germany
| | - Thomas P. Spaniol
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52056 Aachen, Germany
| | - Jun Okuda
- Institute of Inorganic Chemistry
- RWTH Aachen University
- D-52056 Aachen, Germany
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28
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Armbruster F, Augenstein T, Oña-Burgos P, Breher F. Homoleptic Tetrakis(silyl) Complexes of Pd0and Pt0Featuring Metal-Centred Heterocubane Structures: Evidence for the Existence of the Corresponding Mononuclear PdIand PtIComplexes. Chemistry 2013; 19:17899-906. [DOI: 10.1002/chem.201303299] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2013] [Indexed: 11/10/2022]
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29
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Styra S, González-Gallardo S, Armbruster F, Oña-Burgos P, Moos E, Vonderach M, Weis P, Hampe O, Grün A, Schmitt Y, Gerhards M, Menges F, Gaffga M, Niedner-Schatteburg G, Breher F. Heterobimetallic Cuprates Consisting of a Redox-Switchable, Silicon-Based Metalloligand: Synthesis, Structures, and Electronic Properties. Chemistry 2013; 19:8436-46. [PMID: 23737399 DOI: 10.1002/chem.201300586] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Steffen Styra
- Institut für Anorganische Chemie, Karlsruhe Institute of Technology (KIT), Engesserstrasse 15, 76131 Karlsruhe, Germany
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30
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Xiao XQ, Zhao H, Luo J, Xu Z, Lai GQ, Li Z. Synthesis and characterization of heterocyclic disilylchalcogenides. Dalton Trans 2013; 42:3994-4001. [PMID: 23338764 DOI: 10.1039/c2dt32406g] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The reaction of a dipotassium silyl dianion (1) with chalcogenide elements (E) does not afford the corresponding silylchalcogenolates, but allows the generation of a series of heterocyclic disilylchalcogenides (E = S (2), Se (3), Te (4)). Under high temperature, compound 4 can be converted into compound 5, a Te analog of compounds 2 and 3. The compounds were characterized by (1)H, (13)C and (29)Si NMR spectroscopy and high resolution mass spectrometry (HRMS). In addition, X-ray structure analyses were carried out on compounds 2-5. A DFT calculation was also performed.
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Affiliation(s)
- Xu-Qiong Xiao
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, Hangzhou Normal University, Hangzhou, 310012, China
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31
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Xiao XQ, Zhao H, Xu Z, Lai G, He XL, Li Z. Reduction of the dihalocyclopentasilanes. A quest for a homocyclic silylene. Chem Commun (Camb) 2013; 49:2706-8. [DOI: 10.1039/c3cc00114h] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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33
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34
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Li H, Hung-Low F, Krempner C. Synthesis and Structure of Zwitterionic Silylborates and Silylzincates with Pendant Polydonor Arms. Organometallics 2012. [DOI: 10.1021/om300652n] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hui Li
- Department
of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, Texas 79409-1061,
United States
| | - Fernando Hung-Low
- Department
of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, Texas 79409-1061,
United States
| | - Clemens Krempner
- Department
of Chemistry and Biochemistry, Texas Tech University, Box 41061, Lubbock, Texas 79409-1061,
United States
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35
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Popowski E, Rietz I, Fischer C, Erben S, Harloff J, Reinke H. Reaktionen von Bis(trimethylsilyl)aminochlorsilanen mit Lithium - N, Si-Trimethylsilylgruppenwanderung oder Selbstkondensation von Bis(trimethylsilyl)aminosilyllithiumverbindungen. Z Anorg Allg Chem 2012. [DOI: 10.1002/zaac.201200081] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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36
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Xiong Y, Yao S, Driess M. Versatile Conversion ofN-Heterocyclic Silylene to Silyl Metal Compounds by Insertion of Divalent Silicon into Metal-Carbon and Metal-Hydrogen Bonds. Chemistry 2012; 18:3316-20. [DOI: 10.1002/chem.201103656] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2011] [Indexed: 11/12/2022]
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37
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38
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Lee VY, Sekiguchi A. Novel Organometallic Reagents: Geminal Dianionic Derivatives of the Heavy Group 14 Elements. Inorg Chem 2011; 50:12303-14. [PMID: 21630690 DOI: 10.1021/ic2006106] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Vladimir Ya. Lee
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Akira Sekiguchi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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39
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McNerney B, Whittlesey B, Krempner C. Synthesis and Reactivity of New Pyrazolyl‐Functionalized Potassium Silanides. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201001291] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Brian McNerney
- Department of Chemistry and Biochemistry, Texas Tech University, Memorial Drive & Boston, Lubbock, TX, 74909‐41061, USA, Fax: +1‐806‐742‐1289
| | - Bruce Whittlesey
- Department of Chemistry and Biochemistry, Texas Tech University, Memorial Drive & Boston, Lubbock, TX, 74909‐41061, USA, Fax: +1‐806‐742‐1289
| | - Clemens Krempner
- Department of Chemistry and Biochemistry, Texas Tech University, Memorial Drive & Boston, Lubbock, TX, 74909‐41061, USA, Fax: +1‐806‐742‐1289
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40
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Däschlein C, Bauer SO, Strohmann C. Mechanistic Insights into the Reaction of Enantiomerically Pure Lithiosilanes and Electrophiles: Understanding the Differences between Aryl and Alkyl Halides. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201000834] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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41
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Hernández D, Mose R, Skrydstrup T. Reductive Lithiation of Methyl Substituted Diarylmethylsilanes: Application to Silanediol Peptide Precursors. Org Lett 2011; 13:732-5. [DOI: 10.1021/ol102968g] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Dácil Hernández
- Center for Protein Structures, Department of Chemistry and Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Rasmus Mose
- Center for Protein Structures, Department of Chemistry and Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - Troels Skrydstrup
- Center for Protein Structures, Department of Chemistry and Interdisciplinary Nanoscience Center, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
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42
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Li H, Hope-Weeks LJ, Krempner C. A supramolecular approach to zwitterionic alkaline metal silanides and formation of heterobimetallic silanides. Chem Commun (Camb) 2011; 47:4117-9. [PMID: 21380448 DOI: 10.1039/c1cc10148j] [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]
Affiliation(s)
- Hui Li
- Department of Chemistry and Biochemistry, Texas Tech University, Lubbock, TX 79409, USA
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43
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Chowdhury R, Ghosh SK. Organocatalytic Michael addition of aldehydes to a β-silylmethylene malonate to form intermediates for the enantioselective synthesis of hydroxylated valerolactones and piperidines. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.10.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Kundu PK, Ghosh SK. Magnesium-induced regiospecific C-silylation of suitably substituted enoates and dienoates. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.09.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Däschlein C, Gessner V, Strohmann C. Preparation of “Si-Centered” Chiral Silanes by Direct α-Lithiation of Methylsilanes. Chemistry 2010; 16:4048-62. [DOI: 10.1002/chem.200902551] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Däschlein C, Strohmann C. The competition between Si-Si and Si-C cleavage in functionalised oligosilanes: their reactivity with elemental lithium. Dalton Trans 2010; 39:2062-9. [PMID: 20148226 DOI: 10.1039/b920846a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reaction of aryl-substituted disilanes with elemental lithium is a common method for the preparation of lithiosilanes and the subsequent synthesis of functionalised oligosilanes, especially of enantiomerically pure compounds. A series of alkyl- and arylsubstituted di- and trisilanes has been investigated with respect to their reactivity against elemental lithium. Thereby, depending on the substituents, silicon-silicon bond cleavage of the central Si-Si unit and/or silicon-carbon bond cleavage to arenes are observed. Quantum chemical studies provide a deeper insight into the ongoing processes. The reactive centre can be estimated by both, bond elongation after electron transfer and frontier orbital interactions (pi-bonding and sigma-antibonding part). Aromatic substituents at the silicon atoms proved to be necessary for the processing of any cleavage reaction in the studied systems by stabilising the radical anion after electron transfer at the corresponding di- or trisilane. Yet, selective cleavage reactions do not depend on the number of arenes.
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Affiliation(s)
- Christian Däschlein
- Anorganische Chemie, Technische Universität Dortmund, Otto-Hahn-Strasse 6, 44227 Dortmund, Germany
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Weickgenannt A, Oestreich M. Silicon- and Tin-Based Cuprates: Now Catalytic in Copper! Chemistry 2010; 16:402-12. [DOI: 10.1002/chem.200902222] [Citation(s) in RCA: 66] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Tanaka H, Inoue S, Ichinohe M, Sekiguchi A. An (η3-Disilaallyl)lithium Derivative: Interconversion of π-Allyl-Type Bonding and η1 Coordination to a Silyllithium Fragment. Organometallics 2009. [DOI: 10.1021/om900861z] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hiroaki Tanaka
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Shigeyoshi Inoue
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Masaaki Ichinohe
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
| | - Akira Sekiguchi
- Department of Chemistry, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8571, Japan
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Ilies L, Tsuji H, Nakamura E. Synthesis of benzo[b]siloles via KH-promoted cyclization of (2-alkynylphenyl)silanes. Org Lett 2009; 11:3966-8. [PMID: 19658432 DOI: 10.1021/ol9015282] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
(2-Alkynylphenyl)silanes undergo intramolecular cyclization in the presence of an excess or a subequimolar amount of potassium hydride to give a variety of new 2-substituted benzosiloles in good to excellent yields. Some of these compounds showed a high fluorescence quantum yield both in solution and in the solid state, and they also showed reversible reduction in THF.
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Affiliation(s)
- Laurean Ilies
- Department of Chemistry, School of Science, The University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Becker J, Lee V, Nakamoto M, Sekiguchi A, Chrostowska A, Dargelos A. Electrochemical Properties and Computations of Stable Radicals of the Heavy Group 14 Elements (Si, Ge, and Sn). Chemistry 2009; 15:8480-8484. [DOI: 10.1002/chem.200900935] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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