Počet záznamů: 1

Calix[4]arenes Substituted on the Narrow Rim with Malononitrile and Cobalt Bis(dicarbollide) Anion

  1. 1.
    0332511 - UACH-T 2010 RIV DE eng J - Článek v odborném periodiku
    Zhao, J. - Bolte, M. - Dordea, C. - Grüner, Bohumír - Böhmer, V.
    Calix[4]arenes Substituted on the Narrow Rim with Malononitrile and Cobalt Bis(dicarbollide) Anion.
    Synthesis. Roč. 41, č. 23 (2009), s. 4063-4067 ISSN 0039-7881
    Grant CEP: GA ČR GA104/09/0668
    Výzkumný záměr: CEZ:AV0Z40320502
    Klíčová slova: carboranes * metallacarboranes * dicarbollides
    Kód oboru RIV: CA - Anorganická chemie
    Impakt faktor: 2.572, rok: 2009

    Nitrile groups are suitable precursors for amino functions to which various other groups can be attached. Thus, the reaction of the 1,3-bis(3-bromopropyl ether) or 1,3-bis(4-bromobutyl ether) of tert-butylcalix[4]arene with methylmalononitrile has been studied in order to attach four nitrile groups to the narrow rim. Bimacrocyclic dinitriles were formed in 70% yield with malononitrile, and tetranitriles in 85% yield with methylmalononitrile. Subsequent alkylation of the tetranitriles with cobalt dioxane-bis(dicarbollide) gave dianionic calix[4]arenes, isolated as the cesium salts in 68% and 89% yield.
    Trvalý link: http://hdl.handle.net/11104/0177757