Oxybromination reaction of styrene was performed in a two-phase system of water/ionic liquids (ILs). The aim of the work was to make the mild and efficient two-phase system previously developed for the vanadium(V)-catalyzed oxybromination of alkenes, inspired by the activity of haloperoxidase enzymes, even more interesting from a sustainable point of view. As in that case, a brominating intermediate was formed from the metal catalyst, H2O2, and bromide ion in the acid aqueous phase, but chlorinated solvents were replaced with ILs. [bmim(+)][PF6-], [bm(2)im(+)][PF6-], [bmim(+)][BF4-] [bmim(+)][CF3SO3-], and [bmim(+)][(CF3SO2)(2)N-] were tested. We report on interesting results in terms of reaction rates and selectivities.
Conte, V., Floris, B., Galloni, P., Silvagni, A. (2005). Sustainable vanadium(V)-catalyzed oxybromination of styrene: Two-phase system versus ionic liquids. In Pure and Applied Chemistry (pp.1575-1581). RES TRIANGLE PK : INT UNION PURE APPLIED CHEMISTRY [10.1351/pac200577091575].
Sustainable vanadium(V)-catalyzed oxybromination of styrene: Two-phase system versus ionic liquids
CONTE, VALERIA;FLORIS, BARBARA;GALLONI, PIERLUCA;
2005-01-01
Abstract
Oxybromination reaction of styrene was performed in a two-phase system of water/ionic liquids (ILs). The aim of the work was to make the mild and efficient two-phase system previously developed for the vanadium(V)-catalyzed oxybromination of alkenes, inspired by the activity of haloperoxidase enzymes, even more interesting from a sustainable point of view. As in that case, a brominating intermediate was formed from the metal catalyst, H2O2, and bromide ion in the acid aqueous phase, but chlorinated solvents were replaced with ILs. [bmim(+)][PF6-], [bm(2)im(+)][PF6-], [bmim(+)][BF4-] [bmim(+)][CF3SO3-], and [bmim(+)][(CF3SO2)(2)N-] were tested. We report on interesting results in terms of reaction rates and selectivities.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
