Synthesis of a new calix[n]pyrrole: meso-pentaspirocyclohexyl calix[5]pyrrole

We describe the first synthesis of the novel meso-pentaspirocyclohexyl calix[5]pyrrole 2b. Anion–guest properties of the new compound were evaluated with respect to fluoride, chloride, and bromide tetrabutylammonium salts by 1H NMR titration techniques in deuterated dichloromethane at 22°C by follow...

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Bibliographic Details
Published in:Tetrahedron letters 2011-01, Vol.52 (1), p.136-138
Main Authors: Bedolla-Medrano, Mercedes, Chacón-García, Luis, Contreras-Celedón, Claudia A., Campos-García, Jesús
Format: Article
Language:English
Subjects:
Anion binding
Bismuth nitrate
Calixpyrrols
chemical reactions
methylene chloride
nuclear magnetic resonance spectroscopy
pyrroles
salts
Supramolecular chemistry
titration
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Summary:We describe the first synthesis of the novel meso-pentaspirocyclohexyl calix[5]pyrrole 2b. Anion–guest properties of the new compound were evaluated with respect to fluoride, chloride, and bromide tetrabutylammonium salts by 1H NMR titration techniques in deuterated dichloromethane at 22°C by following the induced shifts in the NH resonances upon complexation.
ISSN:0040-4039
1873-3581
DOI:10.1016/j.tetlet.2010.11.007