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Zhang K, Shi DB. Crystal structure of dimethyl 4,4′-((4 R, 5 R)-4,5-diphenylimidazolidine-1,3-diyl)dibenzoate, C 31H 28N 2O 4. Z KRIST-NEW CRYST ST 2023. [DOI: 10.1515/ncrs-2023-0001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Abstract
C31H28N2O4, monoclinic, P21 (no. 4), a = 10.2166(2) Å, b = 11.5327(2) Å, c = 11.6484(2) Å, β = 109.637(2)°, V = 1292.65(5) Å3, Z = 2, R
gt
(F) = 0.0502, wR
ref
(F
2) = 0.1312, T = 149.9(5) K.
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Affiliation(s)
- Kui Zhang
- School of Pharmaceutical Sciences, Zunyi Medical University , Zunyi 563000 , People’s Republic of China
| | - Da-Bin Shi
- School of Pharmaceutical Sciences, Zunyi Medical University , Zunyi 563000 , People’s Republic of China
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2
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Guo M, Chen B, Chen K, Guo S, Liu FS, Xu C, Yao HG. N-Heterocyclic carbene copper complex catalyzed Chan-Evans-Lam reactions of arylboronic acids with azoles and amines. Tetrahedron Lett 2022. [DOI: 10.1016/j.tetlet.2022.154074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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Thaler R, Kopacka H, Wurst K, Müller T, Dinu DF, Liedl KR, Neururer FR, Hohloch S, Bildstein B. Borylated Cymantrenes and Tromancenium Salts with Unusual Reactivity. Organometallics 2022; 41:1464-1473. [PMID: 36157257 PMCID: PMC9490842 DOI: 10.1021/acs.organomet.2c00179] [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] [Received: 04/11/2022] [Indexed: 11/29/2022]
Abstract
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In continuation of
our study of the chemistry of cationic (cycloheptatrienyl)(cyclopentadienyl)manganese(I)
sandwich complexes, so-called “tromancenium” salts,
we report here on their boron-substituted derivatives focusing on
useful boron-mediated synthetic applications. Transmetalation of lithiated
tricarbonyl(cyclopentadienyl)manganese (“cymantrene”)
with boric or diboronic esters affords monoborylated cymantrenes that
are converted by advanced high-power LED photosynthesis followed by
oxidation with tritylium to their 8-boron-substituted tromancenium
complexes. These new functionalized tromancenium salts are fully characterized
by 1H/11B/13C/19F/55Mn NMR, IR, UV–vis, HRMS spectroscopy, single-crystal
structure analysis (XRD) and cyclic voltammetry (CV). IR spectra were
thoroughly analyzed by density functional theory (DFT) on the harmonic
approximation in qualitative agreement of calculated vibrations with
experimental values. Uncommon chemical reactivity of these borylated
tromancenium salts is observed, due to the strongly electron-withdrawing
cationic tromancenium moiety. No Suzuki-type cross-coupling reactions
proved so far achievable, but unusual copper-promoted amination with
sodium azide under microwave irradiation is possible. Diazoniation
of aminotromancenium affords an extremely reactive dicationic tromanceniumdiazonium
salt, which is too labile for standard Sandmeyer reactions, in contrast
to analogous chemistry of cobaltocenium salts. Overall, borylated
tromancenium salts display unexpected and intriguing chemical properties
with the potential for novel synthetic applications in future work.
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Affiliation(s)
- Reinhard Thaler
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Holger Kopacka
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Klaus Wurst
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Thomas Müller
- Institute of Organic Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Dennis F. Dinu
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Klaus R. Liedl
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Florian R. Neururer
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Stephan Hohloch
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
| | - Benno Bildstein
- Institute of General, Inorganic and Theoretical Chemistry, Center for Chemistry and Biomedicine, University of Innsbruck, Innrain 80-82, 6020 Innsbruck, Austria
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Bai R, Liu X, Luo W, Liu S, Jiao L. Research Progress of Chan-Lam Coupling Reaction in Heterogeneous Catalysis. CHINESE J ORG CHEM 2022. [DOI: 10.6023/cjoc202203038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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