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Lhoták P, Tlustý M, Eigner V. Azide Decomposition as a Pathway to Intramolecularly Upper-Rim-Bridged Calix[4]arenes. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1668-9694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
AbstractProximally single-atom-bridged calix[4]arenes possess a rigidified cavity and, thus, unusual complexation properties. Here, we report on the synthesis of the first such heteroatom-bridged compound: amine-bridged calix[4]arene. This compound, prepared by thermal decomposition of 4-azidocalix[4]arene, was obtained alongside very interesting rearranged, inherently chiral 10H-azepino[1,2-a]indole derivatives. NMR titration confirmed the suitability of the amine cavity for the complexation of methylammonium cations; moreover, the –NH– bridge function enables its further derivatization.
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Affiliation(s)
- Pavel Lhoták
- Department of Organic Chemistry, University of Chemistry and Technology, Prague
| | - Martin Tlustý
- Department of Organic Chemistry, University of Chemistry and Technology, Prague
| | - Václav Eigner
- Department of Solid State Chemistry, University of Chemistry and Technology, Prague
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Tlustý M, Eigner V, Dvořáková H, Lhoták P. The atropisomeric dynamic behaviour of symmetrical N-acylated amine-bridged calix[4]arenes. NEW J CHEM 2022. [DOI: 10.1039/d2nj01533a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
N-acylated amine-bridged calix[4]arenes exhibit unusual dynamic behaviour which can be attributed to the restricted rotation around the amide C–N bond.
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Affiliation(s)
- M. Tlustý
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technická 5, 166 28 Prague 6, Czech Republic
| | - V. Eigner
- Department of Solid State Chemistry, UCTP, Technická 5, 166 28 Prague 6, Czech Republic
| | - H. Dvořáková
- Laboratory of NMR Spectroscopy, UCTP, Technická 5, 166 28 Prague 6, Czech Republic
| | - P. Lhoták
- Department of Organic Chemistry, University of Chemistry and Technology, Prague (UCTP), Technická 5, 166 28 Prague 6, Czech Republic
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