Silicon polypodands 1-7 were found to be powerful complexing agents of alkali metal salts, even in low polarity media (chlorobenzene) and hence very efficient phase-transfer catalysts. Their catalytic activity was measured in typical anion-promoted reactions under solid-liquid phase-transfer catalysis (SL-PTC) conditions. It is mainly determined by the complexing ability of the ligand, increasing with the number of silicon atoms and binding sites. Comparison with traditional phase-transfer catalysts showed that these polypodands are better catalysts not only than open-chain PEG400Me2 and TRIDENT, but even than more sophisticated macrocyclic polyethers such as DCH18C6.

Silicon polypodands : a new class of efficient solid-liquid phase-transfer catalysts / A. Maia, D. Landini, B. Leska, G. Schroeder. - In: TETRAHEDRON. - ISSN 0040-4020. - 60:44(2004), pp. 10111-10115.

Silicon polypodands : a new class of efficient solid-liquid phase-transfer catalysts

D. Landini
Secondo
;
2004

Abstract

Silicon polypodands 1-7 were found to be powerful complexing agents of alkali metal salts, even in low polarity media (chlorobenzene) and hence very efficient phase-transfer catalysts. Their catalytic activity was measured in typical anion-promoted reactions under solid-liquid phase-transfer catalysis (SL-PTC) conditions. It is mainly determined by the complexing ability of the ligand, increasing with the number of silicon atoms and binding sites. Comparison with traditional phase-transfer catalysts showed that these polypodands are better catalysts not only than open-chain PEG400Me2 and TRIDENT, but even than more sophisticated macrocyclic polyethers such as DCH18C6.
Silicon polypodands; metal complexing agents; phase transfer catalisys; solid-liquid phase transfer catalyzed reactions
Settore CHIM/04 - Chimica Industriale
2004
Article (author)
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/144534
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