Syntheses of Ditopic Calix[4]arene Receptor Molecules Containing Silicon on the Upper Rim

Autor:	Joe Lewicki, Jonathon Frels, Michael T. Blanda
Rok vydání:	1998
Předmět:	Claisen rearrangement Cone conformation Oxygen atom Silicon chemistry Stereochemistry Calixarene Polymer chemistry Molecule chemistry.chemical_element General Chemistry Relative stability
Zdroj:	Supramolecular Chemistry. 9:255-261
ISSN:	1029-0478 1061-0278
DOI:	10.1080/10610279808034995
Popis:	Calix[4]arene molecules containing two and four silicon atoms appended to the upper rim of the cone conformation were synthesized via hydrosilation of the corresponding di- and tetra-p-allyl calixarene ethers. The p-allyl calixarene ethers were prepared via the well known Claisen rearrangement which transferred the allyl groups originally on the lower rim of the cone to the upper rim. The silated calix[4]arenes were designed to function as ditopic receptor molecules that will bind cations through the oxygen atoms at the lower rim and anions through the silicon atoms on the upper rim. The hydrosilation reaction provided an easy method for introducing different functionality on the silicon atoms in order to attenuate their relative stability and Lewis acidity.
Databáze:	OpenAIRE
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