New Amphiphilic Imidazolium/Benzimidazolium Calix[4]arene Derivatives: Synthesis, Aggregation Behavior and Decoration of DPPC Vesicles for Suzuki Coupling in Aqueous Media

被引：18

作者：

Burilov, Vladimir ^{[1
]}

Garipova, Ramilya ^{[1
]}

Sultanova, Elsa ^{[1
]}

Mironova, Diana ^{[1
]}

Grigoryev, Ilya ^{[1
]}

Solovieva, Svetlana ^{[2
]}

Antipin, Igor ^{[1
]}

机构：

[1] Kazan Fed Univ, 18 Kremlevskaya St, Kazan 420008, Russia

[2] AE Arbuzov Inst Organ & Phys Chem, 8 Arbuzov Str, Kazan 420088, Russia

来源：

NANOMATERIALS | 2020年 / 10卷 / 06期

基金：

俄罗斯科学基金会;

关键词：

calix[4]arene; NHC complex; Suzuki-Miyaura coupling; DPPC vesicles; CALIXARENES; WATER; IMIDAZOLIUM; SURFACTANTS;

D O I：

10.3390/nano10061143

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, new types of amphiphilic calix[4]arene derivatives bearingN-alkyl/aryl imidazolium/benzimidazolium fragments were designed and synthesized by two step transformation: Regioselective Blanc chloromethylation of distal-di-O-butyl calix[4]arene and subsequent interaction withN-Substituted imidazole/benzimidazole. Critical aggregation concentration (CAC) values were estimated using pyrene fluorescent probe. Obtained macrocycles were found to form submicron particles with electrokinetic potential +44-+57 mV in aqueous solution. For the first time it was found that amphiphilic calixarene causes the fast transformation of 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) multilamellar vesicles into unilamellar ones and leads to the ordering of the lipid in membranes at the molar calixarene/DPPC ratio more than 0.07. In situ complexes of calixarene aggregates with Pd(OAc)(2)were found to be active in Suzuki-Miyaura coupling of 1-bromo-4-nitrobenzene with phenylboronic acid in water. It was shown that bulkyN-substituents of heterocycle decrease the catalytic activity of the aggregates. These result can be assigned to the inhibition effect of Pd(II) complex in situ formation by bulky substituents located on the aggregate surface. Embedding of the most active palladiumN-heterocyclic carbene (NHC) complex with methylimidazolium headgroups into DPPC vesicles enhances its catalytic activity in Suzuki-Miyaura coupling.

引用

页码：1 / 14

页数：14

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