Biomimetic models of cytochrome P-450. A doubly tailed manganese(III)–tetraaryl porphyrin; an extremely efficient catalyst for hydrocarbon oxygenations promoted by 30% H2O2

Abstract

Mn^III–porphyrin 1, bearing an imidazole axial ligand and a carboxylic group juxtaposed on opposite sides of the porphyrin plane, is an extremely efficient catalyst for the activation of 30% H₂O₂ in hydrocarbon oxygenations carried out in CH₂Cl₂–H₂O; initial rates at 1 min up to 500 turnovers min^–1 at 0 °C in the epoxidation of cyclooctene are obtained.