Synthesis and conformational behaviour of lower-rim tetraacetylated thiacalix[4]arenes

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F08%3A00020016" target="_blank" >RIV/60461373:22310/08:00020016 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Synthesis and conformational behaviour of lower-rim tetraacetylated thiacalix[4]arenes
Original language description
The acylation of thiacalix[4]arenes with AcCl or Ac2O gave the corresponding lower-rim tetraacetoxy derivatives. In contrast to classical calix[4]arenes, tetraacetylated thiacalix[4]arenes are conformationally mobile in solution and represent a thermodynamic equilibrium of three different conformers at room temperature. As proven by a dynamic 1H NMR study, conformational preferences of acetylated thiacalix[4]arenes considerably depend on the upper-rim substitution. Hence, t-Bu thiacalixarene prefers 1,3-alternate and 1,2-alternate conformations (43% and 38%, respectively), while the upper-rim unsubstituted compound adopts preferably the partial cone conformation (70%).
Czech name
Syntéza a konformační chování tetrasubstituovaných thiacalixarenů
Czech description
Nová syntéza těchto sloučenin spočívá v kombinaci acylace a alkylace .

Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Project
<a href="/en/project/GA104%2F07%2F1242" target="_blank" >GA104/07/1242: Extraction ability and radiation stability of thiaxalixarene derivatives</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2008
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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