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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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Topp A, Köckerling M, Reinke H, Miethchen R, Mamat C. Facile Silylation of Cyclitols Using Silyl Bis(triflates). Eur J Inorg Chem 2018. [DOI: 10.1002/ejic.201701327] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Anke Topp
- Institut für Chemie Universität Rostock Albert‐Einstein‐Straße 3a 18059 Rostock Germany
| | - Martin Köckerling
- Institut für Chemie Universität Rostock Albert‐Einstein‐Straße 3a 18059 Rostock Germany
| | - Helmut Reinke
- Institut für Chemie Universität Rostock Albert‐Einstein‐Straße 3a 18059 Rostock Germany
| | - Ralf Miethchen
- Institut für Chemie Universität Rostock Albert‐Einstein‐Straße 3a 18059 Rostock Germany
| | - Constantin Mamat
- Institut für Radiopharmazeutische Krebsforschung Helmholtz‐Zentrum Dresden‐Rossendorf Bautzner Landstraße 400 013228 Dresden Germany
- Fachrichtung Chemie und Lebensmittelchemie TU Dresden 01062 Dresden Germany
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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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Michalik D, Schulz A, Villinger A. Lewis-Acid-Assisted Methyl Exchange Reactions In Silylated Aminodichloroarsanes. Inorg Chem 2008; 47:11798-806. [DOI: 10.1021/ic801526n] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Dirk Michalik
- Institut für Chemie, Abteilung Anorganische Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany, and Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Axel Schulz
- Institut für Chemie, Abteilung Anorganische Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany, and Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
| | - Alexander Villinger
- Institut für Chemie, Abteilung Anorganische Chemie, Universität Rostock, Albert-Einstein-Strasse 3a, 18059 Rostock, Germany, and Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock, Germany
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Haga R, Burschka C, Tacke R. Syntheses, Structures, and Reactions of 2,2,3,3-Tetrakis(trifluoromethanesulfonato)tetrasilanes: Hexacoordination ([4 + 2] Coordination) of the Two Central Silicon Atoms. Organometallics 2008. [DOI: 10.1021/om800332j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ryuta Haga
- Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Christian Burschka
- Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
| | - Reinhold Tacke
- Institut für Anorganische Chemie, Universität Würzburg, Am Hubland, D-97074 Würzburg, Germany
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Krempner C, Reinke H, Weichert K. Synthesis and Structure of Cyclic Trinuclear Zinc Disiloxides. Eur J Inorg Chem 2007. [DOI: 10.1002/ejic.200600957] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Krempner C, Reinke H, Weichert K. Synthesis and Structure of Cyclic Aluminum Disiloxides. Organometallics 2007. [DOI: 10.1021/om060969h] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. Krempner
- Institut für Chemie der Universität Rostock, A.-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - H. Reinke
- Institut für Chemie der Universität Rostock, A.-Einstein-Strasse 3a, D-18059 Rostock, Germany
| | - K. Weichert
- Institut für Chemie der Universität Rostock, A.-Einstein-Strasse 3a, D-18059 Rostock, Germany
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Krempner C, Köckerling M, Reinke H, Weichert K. Trisilane-1,3-diolato Complexes of Ti and Zr: Syntheses and X-ray Crystal Structures. Inorg Chem 2006; 45:3203-11. [PMID: 16602776 DOI: 10.1021/ic0514997] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The syntheses and structures of zirconium and titanium complexes containing the novel chelating trisilane-1,3-diolate ligand [Me2Si(R2SiO)2]2- (R = SiMe3) (5)-H2 are reported. The chloride complexes [Me2Si(R2SiO)2]TiCl2 (7a) and [Me2Si(R2SiO)2]ZrCl2 x 2 THF (7b) were prepared by the reaction of MCl4 (M = Ti, Zr) with [Me2Si(R2SiO)2]2Ti (6a) and [Me2Si(R2SiO)2]2Zr (6b), which are derived from the reaction of 5 with M(NEt2)4, respectively. In the presence of TiCl4, complexes 6a and 7a undergo a ring-opening reaction to produce the dinuclear complex [Me2Si(R2SiO)2][TiCl3]2 (9). [Me2Si(R2SiO)2]TiMe2 (10) and [Me2Si(R2SiO)2]TiBnz2 (11) were prepared in moderate yields from reactions of 7a with 2 equiv of MeMgBr and BnzMgCl, respectively. According to NMR spectroscopic investigations, the reaction of the dimethyltitanium complex 10 with B(C6F5)3 led to full exchange of both methyl groups by C6F5 groups under quantitative formation of [Me2Si(R2SiO)2]Ti(C6F5)2 (12) and a mixture of B(C6F5)(3-n)Me(n), where n = 1-3. The structure of 12 is further evidenced by the preparation of an identical sample from the reaction of 7a with 2 equiv of C6F5MgBr. Refluxing an ether solution of 12 surprisingly gave [Me2Si(R2SiO)2]2TiC6F5]2O (13) as a result of ether cleavage. The structures of the complexes 7a, 7b, 9, 10, and 13 were determined by X-ray crystallography, and structural discussion of the bond parameters will be given.
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Affiliation(s)
- C Krempner
- Institut für Chemie der Universität Rostock, A.-Einstein-Strasse 3a, D-18059 Rostock, Germany.
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