ChemInform Abstract The oxidation of the α,β-unsaturated ketones (I) to give the corresponding epoxides (II) is achieved with sodium perborate in CH2Cl2 at room temperature using phase-transfer catalysts such as tetrahexylammonium hydrogensulfate.
Salts of the types (NR4)2S2O8 and NR4HSO5 can be prepared easily by ion pair extraction. The lipophilicity of persulfate anions is classified. Phase transfer catalyzed peroxodisulfate oxidation of 2,6- disubstituted phenols yields diphenoquinones.
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