1
|
Hamaguchi A, Terasaki M, Adachi K. Ring-opening-isomerization anionic polymerization via Brook rearrangement. Chem Commun (Camb) 2024; 60:2954-2957. [PMID: 38375689 DOI: 10.1039/d4cc00144c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
Ring-opening isomerization polymerization was developed using a combination of a ring-opening reaction of epoxides and subsequent Brook rearrangement. An epoxy monomer with a benzyltrimethylsilyl group was designed for the polymerization. Characterization of the obtained polymer by NMR and MALDI-TOF-MS indicated that polymerization proceeded exclusively via a ring-opening-isomerization anionic polymerization mechanism.
Collapse
Affiliation(s)
- Asuka Hamaguchi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Masaya Terasaki
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| | - Kaoru Adachi
- Faculty of Molecular Chemistry and Engineering, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
| |
Collapse
|
2
|
Schuh L, Torvisco A, Flock M, Grogger C, Stueger H. Synthesis and Unusual Reactivity of Acyl-Substituted 1,4-Disilacyclohexa-2,5-dienes. Organometallics 2022; 41:3686-3696. [DOI: 10.1021/acs.organomet.2c00475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Indexed: 11/16/2022]
Affiliation(s)
- Lukas Schuh
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria
| | - Michaela Flock
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria
| | - Christa Grogger
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, Graz 8010, Austria
| |
Collapse
|
3
|
Wiesner T, Heurix M, Fischer RC, Torvisco A, Haas M. Synthesis and Characterization of a Variety of α,ω-Bisacylpolysilanes-A Study on Reactivity and Accessibility. ACS OMEGA 2022; 7:38025-38036. [PMID: 36312430 PMCID: PMC9609067 DOI: 10.1021/acsomega.2c05258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Accepted: 09/27/2022] [Indexed: 06/16/2023]
Abstract
In this study, a variety of α,ω-bisacylpolysilanes were synthesized via two synthetic protocols. The first method for obtaining these compounds is based on the substitution reaction of bromine either on silica gel or by the use of silver salts. Surprisingly, instead of the expected bromine substitution product PhC(O)(SiMe2)2C(O)Ph 4a, we found the formation of the diastereomer PhC(O)(SiMe2)2CBrPhOCBrPh(SiMe2)2C(O)Ph 4b indicating a more complex reaction cascade. On the other hand, the phenylated compound 3b yielded the expected bromine substitution product PhC(O)(SiPh2)2C(O)Ph 4c. For the second protocol, we utilized the Corey-Seebach approach to isolate other representatives of this compound class. We found that the substituents at the α-silicon atoms influence the selectivity of the dethioketalization. While the ethylated and phenylated disilanes 5b,c yield the expected bisacyldisilanes 6a,b, the methylated disilane 4a undergoes a BF3-induced Si-Si bond breakage followed by an intermolecular sila-aldol reaction. This hitherto unknown sila-aldol reaction results in the formation of the enantiomer PhC(O)SiMe2C(OMe)PhSiMe2F 6c in excellent yields. All isolated compounds were analyzed by a combination of NMR spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, single-crystal X-ray crystallography, and mass spectrometry. Furthermore, the photochemical pathways of two representative examples (4b,c) were examined.
Collapse
|
4
|
Kyri AW, Schuh L, Knoechl A, Schalli M, Torvisco A, Fischer RC, Haas M, Stueger H. Sila-Peterson Reaction of Cyclic Silanides. Organometallics 2020; 39:1832-1841. [PMID: 32476698 PMCID: PMC7254854 DOI: 10.1021/acs.organomet.0c00106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Indexed: 11/28/2022]
Abstract
![]()
Sila-Peterson
type reactions of the 1,4,4-tris(trimethylsilyl)-1-metallooctamethylcyclohexasilanes
(Me3Si)2Si6Me8(SiMe3)M (2a, M = Li; 2b, M = K) with
various ketones were investigated. The obtained products strongly
depend on the nature of the ketone component. With 2-adamantanone 2a,b afforded the moderately stable silene 3. 3 is the first example of an Apeloig–Ishikawa–Oehme-type
silene with the tricoordinate silicon atom incorporated into a cyclopolysilane
framework and could be characterized by NMR and UV spectroscopy as
well as by trapping reactions with water, methanol, and MeLi. The
reaction of 2b with aromatic ketones also follows a sila-Peterson
type mechanism with formation of carbanionic species. With 1,2-diphenylcyclopropenone 2b reacted by conjugate 1,4-addition to give a spirocyclic
carbanion. In most cases the underlying reaction mechanism could be
elucidated by the isolation and characterization of unstable intermediates
and final products after proper derivatization.
Collapse
Affiliation(s)
- Andreas W. Kyri
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Lukas Schuh
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Andreas Knoechl
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Michael Schalli
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Roland C. Fischer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Michael Haas
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria
| |
Collapse
|
5
|
Haas M, Radebner J, Winkler C, Fischer R, Torvisco A, Stueger H. Isolable endocyclic silenes by thermal Brook rearrangement. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.12.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
6
|
Haas M, Leypold M, Schnalzer D, Torvisco A, Stueger H. Synthesis and characterization of the first relatively stable dianionic germenolates. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1128914] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Michael Haas
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| | - Mario Leypold
- Institute of Organic Chemistry, Graz University of Technology, Graz, Austria
| | - Dominik Schnalzer
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria
| |
Collapse
|
7
|
Willmes P, Leszczyńska K, Heider Y, Abersfelder K, Zimmer M, Huch V, Scheschkewitz D. Isolierung und vielseitige Derivatisierung eines ungesättigten anionischen Siliciumclusters (Silicoid). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201511037] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Philipp Willmes
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - Kinga Leszczyńska
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - Yannic Heider
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - Kai Abersfelder
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - Michael Zimmer
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - Volker Huch
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| | - David Scheschkewitz
- Krupp-Professur für Allgemeine und Anorganische Chemie; Universität des Saarlandes; Am Markt, Zeile 1 66123 Saarbrücken-Dudweiler Deutschland
| |
Collapse
|
8
|
Willmes P, Leszczyńska K, Heider Y, Abersfelder K, Zimmer M, Huch V, Scheschkewitz D. Isolation and Versatile Derivatization of an Unsaturated Anionic Silicon Cluster (Siliconoid). Angew Chem Int Ed Engl 2016; 55:2907-10. [PMID: 26800440 PMCID: PMC4770444 DOI: 10.1002/anie.201511037] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Indexed: 12/03/2022]
Abstract
The characteristic features of bulk silicon surfaces are echoed in the related partially substituted—and thus unsaturated—neutral silicon clusters (siliconoids). The incorporation of siliconoids into more‐extended frameworks is promising owing to their unique electronic features, but further developments in this regard are limited by the notable absence of functionalized siliconoid derivatives until now. Herein we report the isolation and full characterization of the lithium salt of an anionic R5Si6‐siliconoid, thus providing the missing link between silicon‐based Zintl anions and siliconoid clusters. Proof‐of‐principle for the high potential of this species for the efficient transfer of the intact unsaturated R5Si6 moiety is demonstrated by clean reactions with representative electrophiles of Groups 13, 14, and 15.
Collapse
Affiliation(s)
- Philipp Willmes
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - Kinga Leszczyńska
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - Yannic Heider
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - Kai Abersfelder
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - Michael Zimmer
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - Volker Huch
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany
| | - David Scheschkewitz
- Krupp-Chair for General and Inorganic Chemistry, Saarland University, Am Markt, Zeile 1, 66123, Saarbrücken-Dudweiler, Germany.
| |
Collapse
|
9
|
Haas M, Leypold M, Schnalzer D, Torvisco A, Stueger H. Stable Germenolates and Germenes with Exocyclic Structures. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00750] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michael Haas
- Institute of Inorganic Chemistry and ‡Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Mario Leypold
- Institute of Inorganic Chemistry and ‡Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Dominik Schnalzer
- Institute of Inorganic Chemistry and ‡Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Ana Torvisco
- Institute of Inorganic Chemistry and ‡Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| | - Harald Stueger
- Institute of Inorganic Chemistry and ‡Institute of Organic Chemistry, Graz University of Technology, Stremayrgasse 9, A-8010 Graz, Austria
| |
Collapse
|
10
|
Farhadpour B, Guo J, Pavelka LC, Baines KM. Addition of Organometallic Reagents to a Stable Silene and Germene. Organometallics 2015. [DOI: 10.1021/acs.organomet.5b00423] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bahareh Farhadpour
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Jiacheng Guo
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Laura C. Pavelka
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
| | - Kim M. Baines
- Department of Chemistry, University of Western Ontario, London, Ontario N6A 5B7, Canada
| |
Collapse
|
11
|
Bariak V, Malastová A, Almássy A, Šebesta R. Retro-Brook Rearrangement of Ferrocene-Derived Silyl Ethers. Chemistry 2015. [DOI: 10.1002/chem.201501711] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
12
|
|
13
|
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.
Collapse
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
| |
Collapse
|