Synthesis of upper rim covalently linked double calix[6]arenes

被引：11

作者：

Arduini, A ^{[1
]}

Ferdani, R ^{[1
]}

Pochini, A ^{[1
]}

Secchi, A ^{[1
]}

机构：

[1] Univ Parma, Dipartimento Chim Organ & Ind, I-43100 Parma, Italy

来源：

TETRAHEDRON | 2000年 / 56卷 / 43期

关键词：

calixarenes; cage compounds; molecular recognition; quaternary ammonium salts;

D O I：

10.1016/S0040-4020(00)00805-X

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

A series of new double calix[6]arenes obtained through the 1,3,5-upper rim linkage of two calix[6]arene units with imino or 1,4-phenylendiimino bridges has been synthesised. These compounds were conceived as hosts for selected organic cations but since they are molecular cages with different grades of accessibility of the internal cavity, they gave some insight on the way 1,3,5-trimethoxycalix [6]arenes interact with guests and, in particular on the pathway guests choose to access the cavity. H-1 NMR studies showed that the distance between the two calixarene caps and the dimension of the equatorial portals are the key control elements on the efficiency and selectivity of binding. It was thus hypothesised that the entrance of the guests into the cage takes place exclusively from the equatorial portals and, in general, from the upper rim of the calix[6]arene. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：8573 / 8577

页数：5

共 24 条

[1] IMMOBILIZATION OF THE RING INVERSION MOTION IN CALIX[6]ARENE BY A CAP WITH C-3-SYMMETRY [J].