Selektive Alkenoxidation mit H2O2 und einem heterogenisierten Mn-Katalysator: Epoxidierung und ein neuer Zugang zu vicinalencis-Diolen

Abstract

Das kovalente Verankern von 1,4‐Dimethyl‐1,4,7‐triazacyclononan an Kieselgel ist der erste Schritt bei der Herstellung eines heterogenisierten Mn‐Katalysators. Wird H2O2 als Oxidationsmittel eingesetzt, so kann das Material die vicinale cis‐Dihydroxylierung von disubstituierten Olefinen katalysieren, wie hier schematisch gezeigt ist. Dabei werden beide Enantiomere des Produkts erhalten.

Heterogeneous Catalysis and Solid Catalysts

“…Functional groups thus created on the surface can include phosphines, amines etc., which serve as anchored ligands for active species that undergo ligand-exchange reactions. Careful control of the density of functional groups leads to spatial separation of active complexes (site isolation) and thus helps to avoid undesired side reactions [294].…”

Heterogeneous Catalysis and Solid Catalysts

“…Functional groups thus created on the surface can include phosphines, amines etc., which serve as anchored ligands for active species that undergo ligand-exchange reactions. Careful control of the density of functional groups leads to spatial separation of active complexes (site isolation) and thus helps to avoid undesired side reactions [233].…”