title: A thiolate ligand on a cytochrome P-450 mimic permits the use of simple environmentally benign oxidants for biomimetic steroid hydroxylation in water.
abstract: Manganese porphyrin systems carrying cyclodextrin binding groups can regioselectively and stereoselectively hydroxylate bound steroid substrates, using iodosobenzene as oxidant, but hydrogen peroxide and other simple oxidants such as sodium hypochlorite are not effective in water. Thiol ligands were then added to the catalyst, both covalently attached and hydrophobically bound, and with these ligands hydrogen peroxide was now an effective oxidant.
authors.affiliation: Department of Chemistry, Columbia University, New York, NY 10027, USA.
authors.forename: Zhenglai
authors.initials: Z
authors.lastname: Fang
authors.forename: Ronald
authors.initials: R
authors.lastname: Breslow
mesh_terms: D003577:Cytochrome P-450 Enzyme System / Q000378:metabolism*; D006861:Hydrogen Peroxide / Q000737:chemistry; D006900:Hydroxylation; D008024:Ligands; D016877:Oxidants / Q000737:chemistry*; D012973:Sodium Hypochlorite / Q000737:chemistry; D013256:Steroids / Q000737:chemistry*; D013438:Sulfhydryl Compounds; D014867:Water
chemical_list: D008024:Ligands; D016877:Oxidants; D013256:Steroids; D013438:Sulfhydryl Compounds; D014867:Water; D003577:Cytochrome P-450 Enzyme System; D006861:Hydrogen Peroxide; D012973:Sodium Hypochlorite