Immobilization of TEMPO Derivatives in Saponite and Use of These Novel Hybrid Materials as Reusable Catalysts

Roben C, Studer A, Hemme WL, Eckert H

Forschungsartikel (Zeitschrift)

Zusammenfassung

The letter describes a novel approach for immobilization of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) derivatives by cation-exchange reaction of TEMPO ammonium salts in a commercially available saponite. The organic-inorganic hybrid material is readily prepared and characterized by solid-state H-1 NMR spectroscopy. The hybrid material can be used as recyclable catalyst for oxidation of various alcohols. High catalytic activity for up to 10 runs is obtained. Leaching of the nitroxide salt out of the saponite occurs to a small extent. However, original high activity of the hybrid material can be restored by simply reloading the hybrid material with nitroxide salt by cation exchange.

Details zur Publikation

FachzeitschriftSYNLETT
Ausgabe / Heftnr. / Issue7
Seitenbereich1110-1114
StatusVeröffentlicht
Veröffentlichungsjahr2010 (30.04.2010)
Sprache, in der die Publikation verfasst istEnglisch
Stichwörteralcohol oxidation 2,2,6,6-tetramethylpiperidine-1-oxyl TEMPO catalyst immobilization catalysis solid-state NMR spectroscopy poly(ethylene glycol)-supported tempo silica-supported tempo selective oxidation aerobic oxidation organic catalysts metal-free primary alcohols disperse system aldehydes nitroxide

Autor*innen der Universität Münster

Eckert, Hellmut
Professur für Physikalische Chemie (Prof. Eckert)
Studer, Armido
Professur für Organische Chemie (Prof. Studer)