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Mawick M, Jaworski C, Bittermann J, Iovkova L, Pu Y, Wängler C, Wängler B, Jurkschat K, Krause N, Schirrmacher R. CycloSiFA: The Next Generation of Silicon-Based Fluoride Acceptors for Positron Emission Tomography (PET). Angew Chem Int Ed Engl 2023; 62:e202309002. [PMID: 37850849 DOI: 10.1002/anie.202309002] [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: 06/26/2023] [Revised: 10/12/2023] [Accepted: 10/17/2023] [Indexed: 10/19/2023]
Abstract
The ring-opening Si-fluorination of a variety of azasilole derivatives cyclo-1-(iPr2 Si)-4-X-C6 H3 -2-CH2 NR (4: R=2,6-iPr2 C6 H3 , X=H; 4 a: R=2,4,6-Me3 C6 H2 , X=H; 9: R=2,6-iPr2 C6 H3 , X=tBuMe2 SiO; 10: R=2,6-iPr2 C6 H3 , X=OH; 13: R=2,6-iPr2 C6 H3 , X=HCCCH2 O; 22: R=2,6-iPr2 C6 H3 , X=tBuMe2 SiCH2 O) with different 19 F-fluoride sources was studied, optimized and the experience gained was used in a translational approach to create a straightforward 18 F-labelling protocol for the azasilole derivatives [18 F]6 and [18 F]14. The latter constitutes a potential clickable CycloSiFA prosthetic group which might be used in PET tracer development using Cu-catalysed triazole formation. Based on our findings, CycloSiFA has the potential to become a new entry into non-canonical labelling methodologies for radioactive PET tracer development.
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Affiliation(s)
- Matthias Mawick
- Fakultät für Chemie und Chemische Biologie, Lehrstuhl für Organische Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Carolin Jaworski
- Department of Oncology, Division of Oncological Imaging, University of Alberta, Edmonton, AB T6G 1Z2, Canada
| | - Jens Bittermann
- Fakultät für Chemie und Chemische Biologie, Lehrstuhl für Organische Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Ljuba Iovkova
- Fakultät für Chemie und Chemische Biologie, Lehrstuhl für Organische Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Yinglan Pu
- Department of Oncology, Division of Oncological Imaging, University of Alberta, Edmonton, AB T6G 1Z2, Canada
| | - Carmen Wängler
- Department of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Björn Wängler
- Department of Clinical Radiology and Nuclear Medicine, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany
| | - Klaus Jurkschat
- Fakultät für Chemie und Chemische Biologie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Norbert Krause
- Fakultät für Chemie und Chemische Biologie, Lehrstuhl für Organische Chemie, Technische Universität Dortmund, Otto-Hahn-Straße 6, 44227, Dortmund, Germany
| | - Ralf Schirrmacher
- Department of Oncology, Division of Oncological Imaging, University of Alberta, Edmonton, AB T6G 1Z2, Canada
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Gao L, Song Z, Wang W. Synthetic Approaches for the Construction of Five- and Six-Membered Silaazacycles. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1755-3832] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractSilaazacycles (or azasilacycles), containing both nitrogen and silicon atoms, are appealing ring structures in the development of silicon-containing functional molecules. The development of general and efficient methods towards these motifs has therefore attracted considerable attention from synthetic chemists. This short review intends to highlight representative advances in the synthesis of five- and six-membered silaazacycles.1 Introduction2 Five-Membered Silaazacycles2.1 Five-Membered Silaazacycles bearing a 1,2-N/Si Moiety2.2 Five-Membered Silaazacycles bearing a 1,3-N/Si Moiety3 Six-Membered Silaazacycles3.1 Six-Membered Silaazacycles bearing a 1,2-N/Si Moiety3.2 Six-Membered Silaazacycles bearing a 1,3-N/Si Moiety3.3 Six-Membered Silaazacycles bearing a 1,4-N/Si Moiety4 Conclusion
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3
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Reactions of manganese silyl dihydride complexes with CO2. Polyhedron 2021. [DOI: 10.1016/j.poly.2021.115326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Ishida S, Hatakeyama T, Nomura T, Matsumoto M, Yoshimura K, Kyushin S, Iwamoto T. A Six‐Coordinate Silicon Dihydride Embedded in a Porphyrin: Enhanced Hydride‐Donor Properties and the Catalyst‐Free Hydrosilylation of CO
2. Chemistry 2020; 26:15811-15815. [DOI: 10.1002/chem.202002587] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Shintaro Ishida
- Department of Chemistry Graduate School of Science Tohoku University Aoba-ku Sendai 9808578 Japan
| | - Takuroh Hatakeyama
- Department of Chemistry Graduate School of Science Tohoku University Aoba-ku Sendai 9808578 Japan
| | - Takuya Nomura
- Department of Chemistry Graduate School of Science Tohoku University Aoba-ku Sendai 9808578 Japan
| | - Maiko Matsumoto
- Division of Molecular Science Graduate School of Science and Technology Gunma University Kiryu 3768515 Japan
| | - Kimio Yoshimura
- Division of Molecular Science Graduate School of Science and Technology Gunma University Kiryu 3768515 Japan
| | - Soichiro Kyushin
- Division of Molecular Science Graduate School of Science and Technology Gunma University Kiryu 3768515 Japan
| | - Takeaki Iwamoto
- Department of Chemistry Graduate School of Science Tohoku University Aoba-ku Sendai 9808578 Japan
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Dostál L, Jambor R, Aman M, Hejda M. (N),C,N-Coordinated Heavier Group 13-15 Compounds: Synthesis, Structure and Applications. Chempluschem 2020; 85:2320-2340. [PMID: 33073931 DOI: 10.1002/cplu.202000620] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2020] [Revised: 09/23/2020] [Indexed: 01/07/2023]
Abstract
The aim of this review is to summarize recent achievements in the field of (N),C,N-coordinated group 13-15 compounds not only regarding their synthesis and structure, but mainly focusing on their potential applications. Relevant compounds contain various types of N-coordinating ligands built up on an ortho-(di)substituted phenyl platform. Thus, group 13 and 14 derivatives were used as single-source precursors for the deposition of semiconducting thin films, as building blocks for the preparation of high-molecular polymers with remarkable optical and chemical properties or as compounds with interesting reactivity in hydrometallation processes. Group 15 derivatives function as catalysts in the Mannich reaction, in the allylation of aldehydes or activation of CO2 . They were used as transmetallation reagents in transition metal catalysed coupling reactions. The univalent species serve as ligands for transition metals, activate alkynes or alkenes and are utilized as catalysts in the transfer hydrogenation of azo-compounds.
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Affiliation(s)
- Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
| | - Michal Aman
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
| | - Martin Hejda
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, Pardubice 532 10, Czech Republic
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Hejda M, Duvinage D, Lork E, Jirásko R, Lyčka A, Mebs S, Dostál L, Beckmann J. The Aromatic 2-Iminomethylphenyltellurenyl Cation. A Lewis Superacid Despite the Intramolecularly Coordinating N-Donor Ligand. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin Hejda
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ 532 10 Pardubice, Czech Republic
| | - Daniel Duvinage
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
| | - Robert Jirásko
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ 532 10 Pardubice, Czech Republic
| | - Antonín Lyčka
- University of Hradec Králové, Faculty of Science, Rotkitanského 62, CZ-500 03 Hradec Králové 3, Czech Republic
| | - Stefan Mebs
- Institut für Experimentalphysik, Freie Universität Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Libor Dostál
- Department of General and Inorganic Chemistry, University of Pardubice, Studentská 573, CZ 532 10 Pardubice, Czech Republic
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie, Universität Bremen, Leobener Straße 7, 28359 Bremen, Germany
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Růžičková Z, Jambor R, Novák M. Spontaneous Hydrosilylation of Substituted C=N Imines. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900516] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Miroslav Novák
- Institute of Chemistry and Technology of Macromolecular Materials Faculty of Chemical Technology University of Pardubice Studentská 573 53210 Pardubice Czech Republic
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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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Jambor R, Lyčka A. Organosilicon and ‐germanium Hydrides in Catalyst‐Free Hydrometallation Reactions. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700630] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice Studentská 95 53210 Pardubice Czech Republic
| | - Antonín Lyčka
- Faculty of Chemical Technology Centre of Organic Chemistry Rybitví 296 53354 Rybitví Czech Republic
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Hejda M, Lork E, Mebs S, Dostál L, Beckmann J. Intramolecularly Coordinated 2‐Iminomethylphenyltellurium Compounds. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Martin Hejda
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
- Department of General and Inorganic Chemistry University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Enno Lork
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
| | - Stefan Mebs
- Institut für Chemie und Biochemie Freie Universität Berlin Arnimallee 14 14195 Berlin Germany
| | - Libor Dostál
- Department of General and Inorganic Chemistry University of Pardubice Studentská 573 53210 Pardubice Czech Republic
| | - Jens Beckmann
- Institut für Anorganische Chemie und Kristallographie Universität Bremen Leobener Straße 7 28359 Bremen Germany
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11
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Tremmel J, Dostál L, Erben M, Růžičková Z, Turek J, De Proft F, Jambor R. Monomeric
C
,
N
‐Chelated Germanium Hydrides in N–C Bond Cleavage. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201700355] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jakub Tremmel
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Milan Erben
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Zdeňka Růžičková
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC) Member of the QCMM VUB‐UGent Alliance Research Group Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC) Member of the QCMM VUB‐UGent Alliance Research Group Vrije Universiteit Brussel Pleinlaan 2 1050 Brussels Belgium
| | - Roman Jambor
- Department of General and Inorganic Chemistry Faculty of Chemical Technology University of Pardubice 53210 Pardubice Czech Republic
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Novák M, Hošnová H, Dostál L, Glowacki B, Jurkschat K, Lyčka A, Ruzickova Z, Jambor R. Hydrosilylation of RN=CH Imino-Substituted Pyridines without a Catalyst. Chemistry 2017; 23:3074-3083. [PMID: 28052458 DOI: 10.1002/chem.201604892] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Indexed: 11/12/2022]
Abstract
Treatment of the neutral pyridine-based ligands L1 -L3 , bearing either one or two RN=CH imine moieties {where L1 and L2 are N,N-chelating ligands 2-(RN=CH)C5 H4 N (R=Ph (L1 ) or R=2,4,6-Ph3 C6 H2 (L2 )) and L3 is the N,N,N-chelating ligand 2,6-(RN=CH)2 C5 H3 N (R=2,6-iPr2 C6 H3 )}, with HSiCl3 yielded N→Si-coordinated silicon(IV) amides 2-{Cl3 SiN(R)CH2 }C5 H4 N (1, R=Ph; 2, R=2,4,6-Ph3 C6 H2 ) and 2-{Cl3 SiN(R)CH2 }-6-(RN=CH)C5 H4 N (3, R=2,6-iPr2 C6 H3 ). The organosilicon amides 1-3 are the products of spontaneous hydrosilylation of the RN=CH imine moiety induced by N→Si coordination of the proposed N,N-chelated chlorosilanes L1 →SiHCl3 (1 a), L2 →SiHCl3 (2 a), and L3 →SiHCl3 (3 a). Furthermore, the reaction of L3 with an excess of HSiCl3 provided the intramolecularly coordinated chlorosilicon diamide cyclo-{(C5 H3 N)-1,3-(CH2 NR)2 }SiCl2 (4) (R=2,6-iPr2 C6 H3 ) as the product of spontaneous reduction of both RN=CH imine moieties. The compounds have been characterized by NMR spectroscopy (1-4) and single-crystal X-ray diffraction analysis (1, 3, and 4). The mechanism of the hydrosilylation of the second RN=CH imine moiety in 3 by an excess of SiHCl3 has also been studied. The experimental work is supplemented by DFT calculations.
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Affiliation(s)
- Miroslav Novák
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Hana Hošnová
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Britta Glowacki
- Fakultät für Chemie und Chemische Biologie, Technische Universität, 44227, Dortmund, Germany
| | - Klaus Jurkschat
- Fakultät für Chemie und Chemische Biologie, Technische Universität, 44227, Dortmund, Germany
| | - Antonín Lyčka
- Centre of Organic Chemistry, Rybitví 296, 53354, Rybitví, Czech Republic
| | - Zdenka Ruzickova
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
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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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14
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Hejda M, Lyčka A, Mikysek T, Jambor R, Růžička A, Vinklárek J, Wilfer C, Hoffmann A, Herres-Pawlis S, Dostál L. Homolytic, Heterolytic, Mesolytic - As You Like It: Steering the Cleavage of a HC(sp 3 )-C(sp 3 )H Bond in Bis(1H-2,1-benzazaborole) Derivatives. Chemistry 2016; 22:15340-15349. [PMID: 27619080 DOI: 10.1002/chem.201602698] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Indexed: 11/11/2022]
Abstract
A set of (3,3')-bis(1-Ph-2-R-1H-2,1-benzazaborole) compounds, in which R=tBu (Bab-tBu)2 , R=Dipp (Bab-Dipp)2 or R=tBu and Dipp (Bab-Dipp)(Bab-tBu), was synthesized and fully characterized using 1 H, 11 B, 13 C, and 15 N NMR spectroscopy as well as single-crystal X-ray diffraction analysis. The central HC(sp3 )-C(sp3 )H bond with restricted rotation at the junction of both 1H-2,1-benzazaborole rings displayed an intriguing reactivity. It was demonstrated that this bond is easily mesolytically cleaved using alkali metals to form the respective aromatic 1Ph-2R-1H-2,1-benzazaborolyl anions M+ (THF)n (Bab-tBu)- (M=Li, Na, K) and K+ (THF)n (Bab-Dipp)- . Furthermore, the central HC(sp3 )-C(sp3 )H bond of bis(1H-2,1-benzazaborole)s is also homolytically cleaved either by heating or photochemical means, giving corresponding 1Ph-2R-1H-2,1-benzazaborolyl radicals (Bab-tBu). and (Bab-Dipp). , which rapidly self-terminate. Nevertheless, their formation was unambiguously established by NMR analysis of the reaction mixtures containing products of the self-termination of the radicals after heating or irradiation. (Bab-Dipp). radical was also characterized using EPR spectroscopy. Importantly, it turned out that the essentially non-polarized HC(sp3 )-C(sp3 )H bond in (Bab-tBu)2 is also cleaved heterolytically with 2 equiv of MeLi, giving the mixture of Li+ (SOL)n (Bab-tBu)- (SOL=THF or Et2 O) and lithium methyl-substituted borate complex Li+ (SOL)n (Bab-tBu-Me)- in a diastereoselective fashion.
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Affiliation(s)
- Martin Hejda
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic
| | - Antonín Lyčka
- Research Institute for Organic Syntheses, Rybitví 296, CZ-533 54, Pardubice, Czech Republic
| | - Tomáš Mikysek
- Department of Analytical Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic
| | - Jaromír Vinklárek
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic
| | - Claudia Wilfer
- Institute for Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Alexander Hoffmann
- Institute for Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany
| | - Sonja Herres-Pawlis
- Institute for Inorganic Chemistry, RWTH Aachen University, Landoltweg 1, 52074, Aachen, Germany.
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 573, CZ-532 10, Pardubice, Czech Republic.
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15
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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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16
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Hexacoordinate Silicon Compounds with a Dianionic Tetradentate (N,N′,N′,N)-Chelating Ligand. INORGANICS 2016. [DOI: 10.3390/inorganics4020008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
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17
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Novák M, Dostál L, Turek J, Alonso M, De Proft F, Růžička A, Jambor R. Spontaneous Double Hydrometallation Induced by N→M Coordination in Organometallic Hydrides of Group 14 Elements. Chemistry 2016; 22:5620-8. [PMID: 26934563 DOI: 10.1002/chem.201504947] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Indexed: 11/11/2022]
Abstract
Our attempts to synthesise N→M intramolecularly coordinated diorganometallic hydrides L2MH2 [M=Si (4), Ge (5), Sn (6)] containing the CH=N imine group (in which L is C,N-chelating ligand {2-[(2,6-iPr2C6H3)N=CH]C6 H4}(-)) yielded 1,1'-bis(2,6-diisopropylphenyl)-2,2'-spriobi[benzo[c][1,2]azasilole] (7), 1,1'-bis(2,6-diisopropylphenyl)-2,2'-spriobi[benzo[c][1,2]azagermole] (8) and C,N-chelated homoleptic stannylene L2Sn (10), respectively. Compounds 7 and 8 are an outcome of a spontaneous double hydrometallation of the two CH=N imine moieties induced by N→M intramolecular coordination (M=Si, Ge) in the absence of any catalyst. In contrast, the diorganotin hydride L2SnH2 (6) is redox-unstable and the reduction of the tin centre with the elimination of H2 provided the C,N-chelated homoleptic stannylene L2Sn (10). Compounds 7 and 8 were characterised by NMR spectroscopy and X-ray diffraction analysis. Because the proposed N→M intramolecularly coordinated diorganometallic hydrides L2MH2 [M=Si (4), Ge (5), Sn (6)] revealed two different types of reduction reactions, DFT calculations were performed to gain an insight into the structures and bonding of the non-isolable diorganometallic hydrides as well as the products of their subsequent reactions. Furthermore, the thermodynamic profiles of the different reaction pathways with respect to the central metal atom were also investigated.
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Affiliation(s)
- Miroslav Novák
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Jan Turek
- Eenheid Algemene Chemie (ALGC), Member of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium.
| | - Mercedes Alonso
- Eenheid Algemene Chemie (ALGC), Member of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Frank De Proft
- Eenheid Algemene Chemie (ALGC), Member of the QCMM VUB-UGent Alliance Research Group, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Aleš Růžička
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry, Faculty of Chemical Technology, University of Pardubice, Studentská 95, 53210, Pardubice, Czech Republic.
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18
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Vránová I, Jambor R, Růžička A, Jirásko R, Dostál L. Reactivity of N,C,N-Chelated Antimony(III) and Bismuth(III) Chlorides with Lithium Reagents: Addition vs Substitution. Organometallics 2015. [DOI: 10.1021/om5011879] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Iva Vránová
- Department of General and Inorganic Chemistry and ‡Department of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, Pardubice 53210, Czech Republic
| | - Roman Jambor
- Department of General and Inorganic Chemistry and ‡Department of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, Pardubice 53210, Czech Republic
| | - Aleš Růžička
- Department of General and Inorganic Chemistry and ‡Department of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, Pardubice 53210, Czech Republic
| | - Robert Jirásko
- Department of General and Inorganic Chemistry and ‡Department of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, Pardubice 53210, Czech Republic
| | - Libor Dostál
- Department of General and Inorganic Chemistry and ‡Department of Analytical Chemistry,
Faculty of Chemical Technology, University of Pardubice, Studentská
573, Pardubice 53210, Czech Republic
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19
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Dong C, Song T, Bai XF, Cui YM, Xu Z, Xu LW. Enantioselective conjugate addition of cyanide to chalcones catalyzed by a magnesium-Py-BINMOL complex. Catal Sci Technol 2015. [DOI: 10.1039/c5cy01056j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient asymmetric conjugate addition of trimethylsilyl cyanide (TMSCN) to chalcones, catalyzed by bifunctional Py-BINMOL-Mg complex, with moderate to good enantioselectivities and in good yields, has been realized in this work.
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Affiliation(s)
- Cheng Dong
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
| | - Tao Song
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
| | - Xing-Feng Bai
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
| | - Yu-Ming Cui
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
| | - Zheng Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
| | - Li-Wen Xu
- Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, and College of Material
- Chemistry and Chemical Engineering
- Hangzhou Normal University
- Hangzhou 310012
- PR China
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20
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Domoto Y, Sase S, Goto K. Efficient End-Capping Synthesis of Neutral Donor-Acceptor [2]Rotaxanes Under Additive-Free and Mild Conditions. Chemistry 2014; 20:15998-6005. [DOI: 10.1002/chem.201404187] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Indexed: 11/08/2022]
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21
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Kämpfe A, Brendler E, Kroke E, Wagler J. 2-Acylpyrroles as mono-anionic O,N-chelating ligands in silicon coordination chemistry. Chemistry 2014; 20:9409-18. [PMID: 25043769 DOI: 10.1002/chem.201402803] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Indexed: 11/07/2022]
Abstract
Kryptopyrrole (2,4-dimethyl-3-ethylpyrrole) was acylated with, for example, benzoyl chloride to afford 2-benzoyl-3,5-dimethyl-4-ethylpyrrole (L(1)H). With SiCl4 this ligand reacts under liberation of HCl and formation of the complex L(1)2SiCl2. In related reactions with HSiCl3 or H2SiCl2, the same chlorosilicon complex is formed under liberation of HCl and H2 or liberation of H2, respectively. The chlorine atoms of L(1)2SiCl2 can be replaced by fluoride and triflate using ZnF2 and Me3Si-OTf, respectively. The use of a supporting base (triethylamine) is required for the complexation of phenyltrichlorosilane and diphenyldichlorosilane. The complexes L(1)2SiCl2, L(1)2SiF2, L(1)2Si(OTf)2, L(1)2SiPhCl, and L(1)2SiPh2 exhibit various configurations of the octahedral silicon coordination spheres (i.e. cis or trans configuration of the monodentate substituents, different orientations of the bidentate chelating ligands relative to each other). Furthermore, cationic silicon complexes L(1)3Si(+) and L(1) SiPh(+) were synthesized by chloride abstraction with GaCl3. In contrast, reaction of L(1)2SiCl2 with a third equivalent of L(1)H in the presence of excess triethylamine produced a charge-neutral hexacoordinate Si complex with a new tetradentate chelating ligand which formed by Si-templated C-C coupling of two ligands L(1).
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Affiliation(s)
- Alexander Kämpfe
- Institut für Anorganische Chemie, Technische Universität Bergakademie Freiberg, 09596 Freiberg (Germany), Fax: (+49) 3731394058
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