Dioxamethylene intramolecular bridging of p-tert-butylcalix[8]arene

被引：2

作者：

Troisi, F ^{[1
]}

Gaeta, C ^{[1
]}

Neri, P ^{[1
]}

机构：

[1] Univ Salerno, Dipartimento Chim, I-84081 Baronissi, Italy

来源：

TETRAHEDRON LETTERS | 2005年 / 46卷 / 46期

关键词：

calixarenes; calix[8]arenes; intramolecular bridging; dioxamethylene-bridged; lower rim; alkylation;

D O I：

10.1016/j.tetlet.2005.09.054

中图分类号：

O62 [有机化学];

学科分类号：

070303 ; 081704 ;

摘要：

The first examples of dioxamethylene bridged calix[8]arenes 2-6 have been obtained by Cs2CO3-promoted direct O-alkylation of p-tert-butylcalix[8]arene with BrCH2Cl. Assignment of the 1,2-, 1,2:3,4-, 1,2:3,4:6,7-, 1,4:2,3:5,6:7,8-, and 1,2:3,4:5,6:7,8-bridging pattern of 2-6, respectively, was mainly based on chemical shift of OH groups and chemical correlations. Dynamic H-1 NMR studies and MM3 calculations indicated that in these compounds the dioxocine subunit adopts a boat-chair conformation. (c) 2005 Elsevier Ltd. All rights reserved.

引用

页码：8041 / 8045

页数：5

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