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Palladium Catalysts Supported on Mesoporous Molecular Sieves Bearing Nitrogen Donor Groups: Preparation and Use in Heck and Suzuki C-C Bond-Forming Reactions
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SYSNO ASEP 0326442 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Palladium Catalysts Supported on Mesoporous Molecular Sieves Bearing Nitrogen Donor Groups: Preparation and Use in Heck and Suzuki C-C Bond-Forming Reactions Title Palladiové katalyzátory zakotvené na mesoporézním molekulovém sítě nesoucím dusíkové donorové skupiny: příprava a použití v Heckově a Suzukiho reakci Author(s) Demel, Jan (UFCH-W)
Lamač, M. (CZ)
Čejka, Jiří (UFCH-W) RID, ORCID, SAI
Štěpnička, P. (CZ)Source Title ChemSusChem. - : Wiley - ISSN 1864-5631
Roč. 2, č. 5 (2009), s. 442-451Number of pages 10 s. Language eng - English Country DE - Germany Keywords supported catalysts ; Heck reaction ; mesoporous materials ; palladium ; Suzuki reaction Subject RIV CF - Physical ; Theoretical Chemistry R&D Projects LC06070 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA104/09/0561 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000266469600014 DOI 10.1002/cssc.200900006 Annotation A series of supported catalysts is prepared by treatment of SBA-15-type mesoporous molecular sieve bearing SiCH2CH2CH2NHCH2CH2CH2NEt2 groups with palladium(II) acetate. These catalysts are studied in Suzuki biaryl couplings and in Heck reactions to establish the influence of metal loading and innocent surface modifications (trimethylsilylation). The Suzuki reaction proceeded efficiently with model and practically relevant substrates; the catalyst performance increasing with an increasing degree of metalation (decreasing N/Pd ratio). Catalyst poisoning tests revealed that the reaction takes place in the liquid phase with the catalyst serving as a reservoir of active metal species and also as a stabilizing support once the reaction is performed. In the Heck reactions, on the other hand, the catalyst performance strongly changed with the reaction temperature and with N/Pd ratio. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2010
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