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Reductive dehalogenation of aryl halides over palladium catalysts deposited on SBA-15 type molecular sieve modified with amine donor groups
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SYSNO ASEP 0359685 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Reductive dehalogenation of aryl halides over palladium catalysts deposited on SBA-15 type molecular sieve modified with amine donor groups Author(s) Štěpnička, P. (CZ)
Semler, M. (CZ)
Demel, J. (CZ)
Zukal, Arnošt (UFCH-W) RID
Čejka, Jiří (UFCH-W) RID, ORCID, SAISource Title Journal of Molecular Catalysis A-Chemical. - : Elsevier - ISSN 1381-1169
Roč. 341, č. 1-2 (2011), s. 97-102Number of pages 6 s. Language eng - English Country NL - Netherlands Keywords heterogeneous catalysts ; supported catalysts ; palladium Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects GA104/09/0561 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000291774400015 DOI 10.1016/j.molcata.2011.04.001 Annotation 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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