Journal ArticleDOI
Synthesis and Properties of First Bis(fluoreno)crownophanes
TLDR
Alkylation of 2,7-dihydroxy-9H-fluoren-9-one with 2-(2-chloroethoxy)ethanol, 2-[2]-2]-chloroethyloxy]-ethoxy]ethanol and 2-{2-[2-(2]-3]-hexyloxy]-thoxy]ETHanol in dimethylformamide in the presence of potassium carbonate gave 78-80% of the corresponding diols which were treated with p-toluenesulfonyl chloride in a dioxanechloroformAbstract:
Alkylation of 2,7-dihydroxy-9H-fluoren-9-one with 2-(2-chloroethoxy)ethanol, 2-[2-(2-chloroethoxy)-ethoxy]ethanol, and 2-{2-[2-(2-chloroethoxy)ethoxy]ethoxy}ethanol in dimethylformamide in the presence of potassium carbonate gave 78–80% of the corresponding diols which were treated with p-toluenesulfonyl chloride in a dioxanechloroform mixture in the presence of triethylamine at 0– 5°C (30 h). The resulting bis(p-toluene-sulfonates) were brought into condensation with 2,7-dihydroxy-9H-fluoren-9-one in a very dilute solution in dimethylformamide containing anhydrous potassium carbonate at 80–85°C. Appropriate treatment of the reaction mixture, followed by chromatographic purification afforded 53–27% of the first representatives of a new class of cyclophanes, bis(oxofluoreno)crownophanes. Raising the temperature to 95–105°C resulted in an appreciable decrease of the product yield. The yield of the target products did not increase on replacement of potassium carbonate by cesium carbonate.read more
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Journal ArticleDOI
New fluorenonocrownophanes containing azobenzene: synthesis, properties and interaction with paraquat
Alexander Yu. Lyapunov,Tatiana I. Kirichenko,Catherine Yu. Kulygina,Roman I. Zubatyuk,Marina S. Fonari,Alexander Kyrychenko,Andrey O. Doroshenko +6 more
TL;DR: In this article, a crownophane containing 2,7-dioxyfluorenone and 4,4′-azobiphenoxy moieties linked by di-, tri-, tetra-, and pentaethylene glycol residues was synthesized.
Journal ArticleDOI
2,6,8,12-tetraoxa-4,10(1,4)-dibenzena-1,7(2,7)-difluorenacyclododecaphane-19,79-dione- : A new macrocyclic receptor for polar organic molecules
Yu. A. Simonov,T. Yu. Bogashchenko,V. N. Pastushok,M. M. Botoshanskii,M. S. Fonar,A. Yu. Lyapunov,N. G. Luk'yanenko +6 more
TL;DR: In this paper, the results of computer assisted molecular modeling showed that 2,6,8,12-tetraoxa-4,10(1,4)-dibenzena-1,7(2,7)-difluorenacyclododecaphane-19,79-dione is promising as a receptor for polar organic molecules.
Journal ArticleDOI
Synthesis and properties of new fluorenonocrownophanes having a stilbene fragment and their reaction with paraquat
TL;DR: New crownophanes containing 2,7-dioxyfluorenone and 4,4′-stilbene fragments linked through di-, three, tetra-, and pentaethylene glycol linkers were synthesized as discussed by the authors.
Journal ArticleDOI
Synthesis and Properties of First Bis(fluoreno)crownophanes.
TL;DR: Alkylation of 2,7-dihydroxy-9H-fluoren-9-one with 2-(2-chloroethoxy)ethanol, 2-[2]-2]-chloroethyloxy]-ethoxy]ethanol and 2-{2-[2-(2]-3]-hexyloxy]-thoxy]ETHanol in dimethylformamide in the presence of potassium carbonate gave 78-80% of the corresponding diols which were treated with p-toluenesulfonyl chloride in a dioxanechloroform
References
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