Počet záznamů: 1

Reductive dehalogenation of aryl halides over palladium catalysts deposited on SBA-15 type molecular sieve modified with amine donor groups

  1. 1.
    0359685 - UFCH-W 2012 RIV NL eng J - Článek v odborném periodiku
    Štěpnička, P. - Semler, M. - Demel, J. - Zukal, Arnošt - Čejka, Jiří
    Reductive dehalogenation of aryl halides over palladium catalysts deposited on SBA-15 type molecular sieve modified with amine donor groups.
    Journal of Molecular Catalysis A-Chemical. Roč. 341, č. 1-2 (2011), s. 97-102 ISSN 1381-1169
    Grant CEP: GA ČR GA104/09/0561
    Výzkumný záměr: CEZ:AV0Z40400503
    Klíčová slova: heterogeneous catalysts * supported catalysts * palladium
    Kód oboru RIV: CF - Fyzikální chemie a teoretická chemie
    Impakt faktor: 2.947, rok: 2011

    Supported palladium catalysts prepared from palladium(II) acetate and SBA-15 type molecular sieve modified with N-[2-(diethylamino)ethyl]-3-aminopropyl donor groups efficiently catalyse reductive dehalogenation of various bromo- and iodobenzenes with in situ formed triethylammonium formate as the hydrogen source. Since the corresponding chlorobenzenes react at considerably lower rates while fluorobenzenes remain unaffected, the catalytic system can be utilised for selective dehalogenations of multiply halogenated substrates. Compared with Pd/C tested earlier [N.A. Cortese, R.F. Heck, J. Org. Chem. 42 (1977) 3491], the catalysts deposited over modified SBA-15 are more reactive. Besides, they exert rather minor leaching of the metal component (8.4% during five consecutive runs with 0.5 mol.% Pd with respect to the substrate) and maintain their high activity during repeated use.
    Trvalý link: http://hdl.handle.net/11104/0197425