A cylindrical cavity with two different hydrogen-binding boundaries: the calix[4]arene skeleton screwed onto the meso-positions of the calix[4]pyrrole†
- 1 January 1999
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Chemical Communications
- No. 23,p. 2413-2414
- https://doi.org/10.1039/a907563a
Abstract
The acid-catalyzed condensation of pyrrole with p- or m-hydroxyacetophenone led to the formation of meso-tetramethyltetrakis(hydroxyphenyl)calix[4]pyrroles occurring in three isomeric forms, with the cone conformer displaying topologically variable multi-site or multi-point surfaces for binding neutral or anionic substrates.Keywords
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