Abstract
The potential of basidiomycetous enzymes for selective alkane CH-functionalizations in aqueous media has been disclosed utilizing surface and submerged cultures. A screening displayed the high catalytic activity of Dichomitus albidofuscus, Pholiota squarrosa, and Abortiporus biennis in aerobic oxidations of adamantane as a model hydrocarbon. With isopropanol as a co-solvent, the oxidation was accelerated significantly without changes of the fungal growth. 1-Adamantanol was obtained in 40% preparative yield from the oxidation of adamantane by D. albidofuscus. The CH-positional selectivity (3°/2°=3.6) and the deuterium kinetic isotopic effect (kH/kD=2.25) values provide evidence for the participation of fungal metalloenzymes in the CH-activation step.
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