A practical innovative method for highly chemoselective oxidation of alcohols to the aldehyde and ketones
and sulfides to the sulfones using tetra-n-butylammonium peroxomonosulfate (n-Bu4NHSO5) catalyzed by
simple water-insoluble copper (II) phthalocyanine (CuPc) in neat water has been developed. Organic cosolvents,
surfactants, co-catalyst and hydrophilic auxiliaries were completely missed in this heterogeneous
catalytic strategy. The CuPc catalyst and by-product of oxidant (TBAHSO4) could easily be recycled and
reused without loss of activity providing readily scalability.