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Phien TD, Kuzmina LE, Arnason I, Jonsdottir NR, Shlykov SA. The conformational behavior and structure of monosubstituted-1,3,5-trisilacyclohexanes: 1-N,N-dimethylamino-1,3,5-trisilacyclohexane. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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2
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1-t-Butyl-1-phenyl-1-silacyclohexane: Synthesis, conformational analysis in gas and solution by GED, FT-IR and theoretical calculations. J Organomet Chem 2020. [DOI: 10.1016/j.jorganchem.2020.121433] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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3
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Shainyan BA. Silacyclohexanes, Sila(hetero)cyclohexanes and Related Compounds: Structure and Conformational Analysis. Molecules 2020; 25:molecules25071624. [PMID: 32244789 PMCID: PMC7180822 DOI: 10.3390/molecules25071624] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Revised: 03/23/2020] [Accepted: 03/25/2020] [Indexed: 12/04/2022] Open
Abstract
Conformational analysis of Si-mono- and Si,Si-disubstituted silacyclohexanes as well as their analogues with a heteroatom(s) in the ring is reviewed with the focus on the recent results. Experimental measurements in the gas phase (gas electron diffraction, GED) and low temperature NMR spectroscopy (LT NMR) on 1H, 13C and 29Si nuclei are described along with theoretical calculations at the DFT and MP2 levels of theory. Structural and conformational specific features are shown to be principally different from those of the carbon predecessors—the corresponding cyclohexanes, oxanes, thianes and piperidines. The role of various effects (steric, hyperconjugation, stereoelectronic, electrostatic) is demonstrated.
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Affiliation(s)
- Bagrat A Shainyan
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of Russian Academy of Science, 1 Favorsky Street, 664033 Irkutsk, Russia
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Shainyan BA, Suslova EN, Phien TD, Shlykov SA, Heydenreich M, Kleinpeter E. 1-Methylthio-1-phenyl-1-silacyclohexane: Synthesis, conformational preferences in gas and solution by GED, NMR and theoretical calculations. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.130677] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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5
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Conformational rivalry of geminal substituents in silacyclohexane derivatives: 1-Phenyl vs. 1-OR, R=H or Me. Tetrahedron 2019. [DOI: 10.1016/j.tet.2019.04.044] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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6
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Chen H, Chen Y, Tang X, Liu S, Wang R, Hu T, Gao L, Song Z. Rhodium-Catalyzed Reaction of Silacyclobutanes with Unactivated Alkynes to Afford Silacyclohexenes. Angew Chem Int Ed Engl 2019; 58:4695-4699. [PMID: 30742358 DOI: 10.1002/anie.201814143] [Citation(s) in RCA: 56] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Indexed: 12/13/2022]
Abstract
A Rh-catalyzed reaction of silacyclobutanes (SCBs) with unactivated alkynes has been developed to form silacyclohexenes with high chemoselectivity. Good enantioselectivity at the stereogenic silicon center was achieved using a chiral phosphoramidite ligand. The resulting silacyclohexenes are useful scaffolds for synthesizing structurally attractive silacyclic compounds.
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Affiliation(s)
- Hua Chen
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Yi Chen
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Xiaoxiao Tang
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Shunfa Liu
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Runping Wang
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Tianbao Hu
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Lu Gao
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China
| | - Zhenlei Song
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology, Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry, West China School of Pharmacy, Sichuan University, Chengdu, 610041, China.,State Key Laboratory of Elemento-organic Chemistry, Nankai University, Tianjin, 300071, China
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7
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Chen H, Chen Y, Tang X, Liu S, Wang R, Hu T, Gao L, Song Z. Rhodium‐Catalyzed Reaction of Silacyclobutanes with Unactivated Alkynes to Afford Silacyclohexenes. Angew Chem Int Ed Engl 2019. [DOI: 10.1002/ange.201814143] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hua Chen
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Yi Chen
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Xiaoxiao Tang
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Shunfa Liu
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Runping Wang
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Tianbao Hu
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Lu Gao
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
| | - Zhenlei Song
- Sichuan Engineering Laboratory for Plant-Sourced Drug and Research Center for Drug Industrial Technology Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry West China School of Pharmacy Sichuan University Chengdu 610041 China
- State Key Laboratory of Elemento-organic Chemistry Nankai University Tianjin 300071 China
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8
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Shainyan BA, Suslova EN, Phien TD, Shlykov SA, Kleinpeter E. Synthesis, conformational preferences in gas and solution, and molecular gear rotation in 1-(dimethylamino)-1-phenyl-1-silacyclohexane by gas phase electron diffraction (GED), LT NMR and theoretical calculations. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.06.023] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Synthesis of 3-fluoro-3-methyl-3-silatetrahydropyran and its conformational preferences in gas and solution by GED, NMR and theoretical calculations. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.02.055] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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10
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Phien TD, Shlykov SA, Shainyan BA. Molecular structure and conformational behavior of 1-methyl-1-phenylsilacyclohexane studied by gas electron diffraction, IR spectroscopy and quantum chemical calculations. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.01.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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11
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Shainyan BA, Belyakov AV, Sigolaev YF, Khramov AN, Kleinpeter E. Molecular Structure and Conformational Analysis of 1-Phenyl-1-X-1-Silacyclohexanes (X = F, Cl) by Electron Diffraction, Low-Temperature NMR, and Quantum Chemical Calculations. J Org Chem 2017; 82:461-470. [PMID: 27976896 DOI: 10.1021/acs.joc.6b02538] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molecular structure and conformational preferences of 1-phenyl-1-X-1-silacyclohexanes C5H10Si(Ph,X) (X = F (3), Cl (4)) were studied by gas-phase electron diffraction, low-temperature NMR spectroscopy, and high-level quantum chemical calculations. In the gas phase only three (3) and two (4) stable conformers differing in the axial or equatorial location of the phenyl group and the angle of rotation about the Si-CPh bond (axi and axo denote the Ph group lying in or out of the X-Si-CPh plane) contribute to the equilibrium. In 3 the ratio Pheq:Phaxo:Phaxi is 40(12):55(24):5 and 64:20:16 by experiment and theory, respectively. In 4 the ratio Pheq:Phaxo is 79(15):21(15) and 71:29 by experiment and theory (M06-2X calculations), respectively. The gas-phase electron diffraction parameters are in good agreement with those obtained from theory at the M06-2X/aug-ccPVTZ and MP2/aug-cc-pVTZ levels. Unlike the case for M06-2X, MP2 calculations indicate that 3-Pheq conformer lies 0.5 kcal/mol higher than the 3-Phaxo conformer. As follows from QTAIM analysis, the phenyl group is more stable when it is located in the axial position but produces destabilization of the silacyclohexane ring. By low-temperature NMR spectroscopy the six-membered-ring interconversion could be frozen at 103 K and the present conformational equilibria of 3 and 4 could be determined. The ratio of the conformers is 3-Pheq:3-Phax = (75-77):(23-25) and 4-Pheq:4-Phax = 82:18.
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Affiliation(s)
- Bagrat A Shainyan
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Science , 1 Favorsky Street, 664033 Irkutsk, Russian Federation
| | | | - Yurii F Sigolaev
- St. Petersburg State Technological Institute , 190013 St. Petersburg, Russia
| | - Alexander N Khramov
- St. Petersburg State Technological Institute , 190013 St. Petersburg, Russia
| | - Erich Kleinpeter
- Chemisches Institut der Universitat Potsdam , Karl-Liebknecht-Straße 24-25, D-14476 Potsdam (Golm), Germany
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Bodi A, Sigurdardottir KL, Kvaran Á, Bjornsson R, Arnason I. Dissociative Photoionization of 1-Halogenated Silacyclohexanes: Silicon Traps the Halogen. J Phys Chem A 2016; 120:9188-9197. [DOI: 10.1021/acs.jpca.6b09195] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Andras Bodi
- Laboratory
for Femtochemistry and Synchrotron Radiation, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | | | - Ágúst Kvaran
- Science
Institute, University of Iceland, Dunhaga 3, 107 Reykjavík, Iceland
| | - Ragnar Bjornsson
- Science
Institute, University of Iceland, Dunhaga 3, 107 Reykjavík, Iceland
| | - Ingvar Arnason
- Science
Institute, University of Iceland, Dunhaga 3, 107 Reykjavík, Iceland
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