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Statements

Subject Item
n2:RIV%2F60461373%3A22310%2F03%3A00007486%21RIV%2F2004%2FMSM%2F223104%2FN
rdf:type
skos:Concept n16:Vysledek
dcterms:description
A novel thiacalix[4]arene derivative bearing four phenyl groups on the upper rim was prepared by the direct condensation of biphenyl-4-ol with elemental sulphur. As revealed by X-ray diffraction analysis, this compound adopts the cone conformation in thesolid state, thus creating a cavity with an extended -aromatic system potentially applicable for solid-state inclusion of suitable molecules. Subsequent alkylation (RI/K2CO3/acetone, R=Me, Et, Pr) yielded tetraalkylated derivatives, which were studied f or their conformational preferences using 1H NMR spectroscopy. While the Me or Et derivatives are conformationally mobile and exhibit thermodynamic equilibria of several conformers in solution (CDCl3 or CD2Cl2), the corresponding propoxy derivative is infinitely stable at room temperature. A novel thiacalix[4]arene derivative bearing four phenyl groups on the upper rim was prepared by the direct condensation of biphenyl-4-ol with elemental sulphur. As revealed by X-ray diffraction analysis, this compound adopts the cone conformation in thesolid state, thus creating a cavity with an extended -aromatic system potentially applicable for solid-state inclusion of suitable molecules. Subsequent alkylation (RI/K2CO3/acetone, R=Me, Et, Pr) yielded tetraalkylated derivatives, which were studied f or their conformational preferences using 1H NMR spectroscopy. While the Me or Et derivatives are conformationally mobile and exhibit thermodynamic equilibria of several conformers in solution (CDCl3 or CD2Cl2), the corresponding propoxy derivative is infinitely stable at room temperature.
dcterms:title
Synthesis of deep.cavity thiacalix(4)arene Synthesis of deep.cavity thiacalix(4)arene
skos:prefLabel
Synthesis of deep.cavity thiacalix(4)arene Synthesis of deep.cavity thiacalix(4)arene
skos:notation
RIV/60461373:22310/03:00007486!RIV/2004/MSM/223104/N
n4:strany
8093-8097
n4:aktivita
n17:Z
n4:aktivity
Z(MSM 223400008)
n4:cisloPeriodika
44
n4:dodaniDat
n10:2004
n4:domaciTvurceVysledku
n11:3163644 n11:4338820 n11:8169985 n11:3486222 n11:9416692
n4:druhVysledku
n6:J
n4:duvernostUdaju
n14:S
n4:entitaPredkladatele
n18:predkladatel
n4:idSjednocenehoVysledku
630044
n4:idVysledku
RIV/60461373:22310/03:00007486
n4:jazykVysledku
n5:eng
n4:klicovaSlova
Thiacalixarenes; X-ray crystallography; alkylation; conformational analysis
n4:klicoveSlovo
n7:Thiacalixarenes n7:alkylation n7:X-ray%20crystallography n7:conformational%20analysis
n4:kodStatuVydavatele
BE - Belgické království
n4:kontrolniKodProRIV
[FAE70DFA6741]
n4:nazevZdroje
Tetrahedron Letters
n4:obor
n15:CB
n4:pocetDomacichTvurcuVysledku
5
n4:pocetTvurcuVysledku
6
n4:pocetUcastnikuAkce
0
n4:pocetZahranicnichUcastnikuAkce
0
n4:rokUplatneniVysledku
n10:2003
n4:svazekPeriodika
44
n4:tvurceVysledku
Lhoták, Pavel Šmejkal, T. Petříčková, Hana Stibor, Ivan Tkadlecová, Marcela Havlíček, Jaroslav
n4:zamer
n12:MSM%20223400008
s:issn
0040-4039
s:numberOfPages
5
n9:organizacniJednotka
22310