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Bulky iron complexes are described that catalyze the site‐selective oxidation of alkyl C−H bonds with hydrogen peroxide under mild conditions. Steric bulk at the iron center is introduced by appending trialkylsilyl groups at the meta‐position of the pyridines in tetradentate aminopyridine ligands, and this effect translates into high product yields, an enhanced preferential oxidation of secondary...
Für Synthesen nutzbar ist ein Eisenkatalysator nach biologischem Vorbild, der Olefine unter milden Bedingungen mit Luft zu Epoxiden oxidieren kann (siehe Schema). Aromatische Olefine werden in hohen Ausbeuten mit exzellenten Chemoselektivitäten oxidiert. Mechanistische Untersuchungen zeigen deutliche Unterschiede zu bekannten radikalischen Autoxidationen.
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