Dual binding mode of alkylammonium cations to (1,3)-calix[5]crown-6 triesters

被引：14

作者：

Gattuso, M

Notti, A

Pappalardo, S

Parisi, MF

机构：

[1] Univ Messina, Dipartimento Chim Organ & Biol, I-98166 Messina, Italy

[2] Univ Catania, Dipartimento Sci Chim, I-95125 Catania, Italy

来源：

TETRAHEDRON LETTERS | 1998年 / 39卷 / 14期

关键词：

D O I：

10.1016/S0040-4039(98)00107-5

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

Potentially heteroditopic receptors 1c-h are easily obtained by exhaustive alkylation of (1,3)-calix[5]crown-6 triols 1a (R' = Bu-t) or 1b (R' = H) with alkyl bromoacetates. H-1 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. (C) 1998 Elsevier Science Ltd. All rights reserved.

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页码：1969 / 1972

页数：4

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