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Ravutsov M, Dobrikov GM, Dangalov M, Nikolova R, Dimitrov V, Mazzeo G, Longhi G, Abbate S, Paoloni L, Fusè M, Barone V. 1,2-Disubstituted Planar Chiral Ferrocene Derivatives from Sulfonamide-Directed ortho-Lithiation: Synthesis, Absolute Configuration, and Chiroptical Properties. Organometallics 2021. [DOI: 10.1021/acs.organomet.0c00712] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Martin Ravutsov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Georgi M. Dobrikov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Miroslav Dangalov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Rositsa Nikolova
- Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 107, Sofia 1113, Bulgaria
| | - Vladimir Dimitrov
- Institute of Organic Chemistry with Centre of Phytochemistry, Bulgarian Academy of Sciences, Akademic Georgi Bonchev Street, Bl. 9, 1113 Sofia, Bulgaria
| | - Giuseppe Mazzeo
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
| | - Giovanna Longhi
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Research Unit of Brescia, Istituto Nazionale di Ottica (INO), CNR, 25123 Brescia, Italy
| | - Sergio Abbate
- Dipartimento di Medicina Molecolare e Traslazionale, Università di Brescia, Viale Europa 11, 25123 Brescia, Italy
- Research Unit of Brescia, Istituto Nazionale di Ottica (INO), CNR, 25123 Brescia, Italy
| | - Lorenzo Paoloni
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Marco Fusè
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126 Pisa, Italy
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Varmužová V, Horký F, Štěpnička P. Synthesis and coordination of a hybrid phosphinoferrocene sulfonamide ligand. NEW J CHEM 2021. [DOI: 10.1039/d1nj00080b] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A hybrid, phosphinoferrocene sulfonamide ligand was synthesised and studied as a ligand in Pd(ii) complexes, which were structurally characterised. Selected compounds were studied by cyclic voltammetry.
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Affiliation(s)
- Věra Varmužová
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University
- Hlavova 2030
- Czech Republic
| | - Filip Horký
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University
- Hlavova 2030
- Czech Republic
| | - Petr Štěpnička
- Department of Inorganic Chemistry
- Faculty of Science
- Charles University
- Hlavova 2030
- Czech Republic
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Directed ortho-lithiation as a tool for synthesis of chiral 1,2-disubstituted arylsulfonamides. MONATSHEFTE FUR CHEMIE 2018. [DOI: 10.1007/s00706-018-2296-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Fernández Sáez N, García López J, Iglesias MJ, López Ortiz F. Derivatization of (quinolin-8-yl)phosphinimidic amides via ortho-lithiation revisited. Dalton Trans 2015; 44:11504-13. [PMID: 26030882 DOI: 10.1039/c5dt01392e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
5The direct ortho-lithiation of N-H containing (quinolin-8-yl)phosphinimidic amides by reaction with 1 equiv. of n-BuLi described by Wang and co-workers has been re-examined. The multinuclear magnetic resonance ((1)H, (2)H, (7)Li, (13)C, (15)N and (31)P) study of the species formed in the monolithiation of N-(tert-butyl)-P,P-diphenyl-N'-(quinolin-8-yl)phosphinimidic amide 5 with n-BuLi in THF showed that proton abstraction occurred exclusively and quantitatively at the NH. The combination of the NMR results with a DFT study made it possible to describe the structure of the N-lithiated species 9 as a dimer consisting of an eight-membered ring showing two lithium ions triply coordinated to nitrogen atoms corresponding to the deprotonated amine and aminoquinoline moieties of different monomers. The formation of a polymer featuring the same coordination mode couldn't be excluded. In addition, optimized conditions for the efficient derivatization of 5 via ortho-lithiation were realised. The reaction of 5 with 2.4 equiv. of t-BuLi in THF in the temperature range of -80 °C to 25 °C for 3 h afforded a N,C(ortho)-dilithiated species that was trapped with a series of electrophiles leading to new functionalized ortho derivatives of 5 in good yields.
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Affiliation(s)
- Nerea Fernández Sáez
- Área de Química Orgánica, Universidad de Almería, Carretera de Sacramento s/n, 04120 Almería, Spain.
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