One‐Step Synthesis of Singly Bridged Biscalix[4]arenes with Oligooxyethyleneethyl Spacers

Zheng, Qian; Gong, Shuling; Chen, Yuanyin

doi:10.1080/00397910701462955

Cited by 2 publications

(2 citation statements)

References 49 publications

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“…In this case NaH was used as base, with the yields ranging from 17% (R = t Bu, n = 3) to 49% (R = t Bu, n = 1). 37 Extraction of alkali metal salts as well as those of Co(II), Ni(II), Cu(II), Cd(II) and Hg(II) by the ether-linked biscalixarene 110 were investigated by Memon and Yilmaz. 38 Although the ligand showed a good selectivity for Hg 2+ , it was a relatively poor extractant.…”

Section: Bis-calixarenes With Linkers Containing CC Double and Cc Tri...mentioning

confidence: 99%

Calix[4]arene daisychains

et al. 2009

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Generic calix[4]arenes became readily accessible in the late 70s. With their potential eight anchoring points, their utility for the production of sophisticated, highly functionalised macrocyclic molecules was rapidly recognised. While most studies in calixarene chemistry have focused on monocalixarene derivatives, there is now an increasing interest in developing multicalixarene compounds, especially those made of several linearly-arranged calix[4]arene units, the first examples of which were reported in 1989. This critical review will present the most important synthetic routes to such molecules together with an analysis of the properties that such cavity combinations may induce. In particular it will be shown that the nature of the links between the calixarene units plays a determinant role in the product properties and that singly-linked calixarenes can be exploited in varied applications, including those as efficient receptors of large molecules, as electrochemical and luminescent sensors in ion detection, or as new materials allowing capsule formation suitable for the storage of small guests (82 references).

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Section: Bis-calixarenes With Linkers Containing CC Double and Cc Tri...mentioning

confidence: 99%

Calix[4]arene daisychains

et al. 2009

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“…For the synthesis of these macrobicyclic compounds, calixarenes are coupled with bifunctional reagents which results in inter-and/or intra-molecular bridging depending on the reaction conditions 1,2 . For example, 5,11,17,23-tetrakis[(propargyloxy)methyl]-25,26,27,28-tetra(benzyloxy)calix [4]arene in 1,3-alternate conformation afforded both kinds of products when oxidatively coupled, though intermolecularly coupled product is obtained in just 7% yield 3 In the literature, direct reaction of calix [4]/ [6]arenes with oligoethyleneglycol ditosylates afforded crowned-calixarenes and/or multi-bridged biscalixarenes [31][32][33] as the reaction products; and in only few of the reports, formation of singly-bridged biscalixarenes like 2 was mentioned 10,34 .…”

Section: Introductionmentioning

confidence: 99%

Direct Synthesis of Singly-Bridged Biscalixarenes and Crowned-Calixarenes

Kumar¹

2018

IJCTR

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Two tail-to-tail linked singly-bridged biscalix[6]/[4]arenes were directly synthesized by reaction of calix[6]/[4]arenes with diethyleneglycol ditosylate in presence of KHCO 3 as the base. It was found that this coupling depended on the kind of calixarene. With calix[4]arene, both corresponding biscalixarene and crowned-calixarene were obtained in this reaction. But in case of p-tert-butylcalix[4]arene, this reaction afforded corresponding crowned-calixarene only. In addition to that, coupling reaction also depends on the linker as evident by the synthesis of corresponding crowned-calixarenes/mono-O-alkylated derivatives, in case of p-tertbutylcalix[6]arene.

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One‐Step Synthesis of Singly Bridged Biscalix[4]arenes with Oligooxyethyleneethyl Spacers

Cited by 2 publications

References 49 publications

Calix[4]arene daisychains

Calix[4]arene daisychains

Direct Synthesis of Singly-Bridged Biscalixarenes and Crowned-Calixarenes

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