title: Regioselectivity and diasteroselectivity in Pt(II)-mediated "green" catalytic epoxidation of terminal alkenes with hydrogen peroxide: mechanistic insight into a peculiar substrate selectivity.
abstract: Recently developed electron-poor Pt(II) catalyst 1 with the "green" oxidant 35% hydrogen peroxide displays high activity and complete substrate selectivity in the epoxidation of terminal alkenes because of stringent steric and electronic requirements. In the presence of isolated dienes bearing terminal and internal double bonds, epoxidation is completely regioselective toward the production of terminal epoxides. Insight into the mechanism is gained by means of a reaction progress kinetic analysis approach that underlines the peculiar role of 1 in activating both the alkene and H2O2 in the rate-determining step providing a rare example of nucleophilic oxidation of alkenes by H2O2.
authors.affiliation: Dipartimento di Chimica, Università Ca' Foscari di Venezia, Dorsoduro 2137, I-30123 Venice, Italy.
authors.forename: Marco
authors.initials: M
authors.lastname: Colladon
authors.forename: Alessandro
authors.initials: A
authors.lastname: Scarso
authors.forename: Paolo
authors.initials: P
authors.lastname: Sgarbossa
authors.forename: Rino A
authors.initials: RA
authors.lastname: Michelin
authors.forename: Giorgio
authors.initials: G
authors.lastname: Strukul