Potentially heteroditopic receptors 1c-h are easily obtained by exhaustive alkylation of(1,3)-calix[5]crown-6 triols 1a (R' - 'Bu) or 1b (R' - H) with alkyl bromoacetates. 1H NMR titration experiments provide clear evidence for a dual (endo-cavity and/or exo-cavity) binding mode of alkylammonium cations to hosts 1c-h, depending on the shape of the guest and the size of substituents at the upper rim.
Dual binding mode of alkylammonium cations to (1,3)- calix[5]crown-6 triesters
GATTUSO, Mario;NOTTI, Anna;PARISI, Melchiorre
1998-01-01
Abstract
Potentially heteroditopic receptors 1c-h are easily obtained by exhaustive alkylation of(1,3)-calix[5]crown-6 triols 1a (R' - 'Bu) or 1b (R' - H) with alkyl bromoacetates. 1H NMR titration experiments provide clear evidence for a dual (endo-cavity and/or exo-cavity) binding mode of alkylammonium cations to hosts 1c-h, depending on the shape of the guest and the size of substituents at the upper rim.File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate
I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
