Abstract:Novel glycoluril-bridged bis(benzocrown ethers) have been synthesized. The appropriate bis (benzo-18-crown-6) was formed in a good yield by reaction of bis(cyclomethoxymethylene)diphenylglycoluril with benzo-18-crown-6 in polyphosphoric acid. The reaction with dibenzo-18-crown-6 under the same conditions leads only to polymeric products. The corresponding bis (dibenzo-18-crown-6) (дибензо-18-краун-6). Изучена экстракция катионов щелочных металлов полученными соединениями из водной фазы в хлороформ. В сра… Show more
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