Oxidation of styrene catalyzed by ionic manganese porphyrin immobilized in ionic liquid

Without the additional involvement of axial ligand and organic solvent, the ionic manganese porphyrin [ Mn (III) (BF4)T(N-Me4-Py) P] [ BF4](4)(1d) immobilized in [ BMIM] BF4 efficiently catalyzed the oxidation of styrene with a good activity(87% conv.) and epoxide selectivity(90%) under mild reaction conditions. The generality of 1d-[ BMIM] BF4 system to the substrates of styrene derivatives with different electronical effects also lead to the pleasing results. The degradation of metalloporphyrin coming from the pi-pi stacking of porphyrin itself and the oxidation destruction was greatly suppressed in this built-up 1d-[ BMIM] BF4 system.