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Titolo:
Suzuki reaction over palladium-complex loaded MCM-41 catalysts
Autore:
Kosslick, H; Monnich, I; Paetzold, E; Fuhrmann, H; Fricke, R; Muller, D; Oehme, G;
Indirizzi:
Inst Angew Chem Berlin Adlershof eV, D-12484 Berlin, Germany Inst Angew Chem Berlin Adlershof eV Berlin Germany D-12484 rlin, Germany Univ Rostock eV, Inst Organ Katalyseforsch, D-18055 Rostock, Germany Univ Rostock eV Rostock Germany D-18055 forsch, D-18055 Rostock, Germany
Titolo Testata:
MICROPOROUS AND MESOPOROUS MATERIALS
, volume: 44, anno: 2001,
pagine: 537 - 545
SICI:
1387-1811(200106)44:<537:SROPLM>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
MESOPOROUS SILICATES;
Keywords:
MCM-41; SBA-n; catalysis; palladium complex; heterogenization; Suzuki reaction; carbon-carbon coupling;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
14
Recensione:
Indirizzi per estratti:
Indirizzo: Kosslick, H Inst Angew Chem Berlin Adlershof eV, Richrd Willstatter Str 12, D-12484 Berlin, Germany Inst Angew Chem Berlin Adlershof eV Richrd Willstatter Str 12 Berlin Germany D-12484
Citazione:
H. Kosslick et al., "Suzuki reaction over palladium-complex loaded MCM-41 catalysts", MICROP M M, 44, 2001, pp. 537-545

Abstract

Palladium-complex loaded Al-MCM-41 catalysts have been used to heterogenize the homogeneous catalyzed Suzuki reaction. The Suzuki reaction is a convenient method for the C-C coupling of arylhalogenides with arylboronacids yielding biphenyles, The mesoporous catalyst supports were prepared by anchoring of alkylsilylsulfonic acid to as-prepared calcined Al-MCM-41. The PdCl2[Ph2P(CH2)(2)S(CH2)(3)SO3Na](2) complex was used as catalytically active precursor and directly loaded onto the support from solution. Materials were characterized by Si-29 MAS NMR, C-13 CPI MAS NMR, nitrogen adsorption, TG/DTA, CHNS analysis, XPS, and TEM. The Si/Al ratio of the Al-MCM-41 was 10.7. The pore size was approximate to 30 Angstrom. The catalytic tests were performed in a batch reactor at 78 degreesC in a toluene/ethanol/water mixturewith sodium carbonate as base and cetyltrimethylammoniumbromide as surfactant. Conversions and selectivities were determined by gas chromatography. For comparison also large pore SEA type mesoporous molecular sieves were included. The results indicate that Pd-complex/MCM-41 catalysts can be successfully used in the Suzuki C-C-coupling reaction. Catalysts can be recycled and re-used. The recycled catalysts show an enhanced activity. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 18/11/17 alle ore 03:37:34