Among the various interesting features of vanadium(V) there is its ability to activate hydrogen peroxide in diverse oxidation reactions. In this respect, we proposed a simple and effective procedure for oxybromination of unsaturated substrates in a biphasic system H2O/CH2Cl2. Then, with the aim of rendering such a procedure even more interesting from the sustainability point of view, we have substituted chlorinated solvents with ionic liquids, ILs. Interestingly enough, we observed a remarkable increase of both yield and selectivity with styrene and ethynylbenzene, obtaining synthetically interesting results. Here we report results with other substrates in order to enlarge the scope of the reaction. Very preliminary data of peroxovanadium catalyzed hydroxylation of arenes in ILs are also mentioned.
Conte, V., Floris, B., Silvagni, A. (2007). Vanadium-catalyzed oxidation in ionic liquids. In VANADIUM: THE VERASTILE METAL (pp.28-37). WASHINGTON : AMER CHEMICAL SOC.
Vanadium-catalyzed oxidation in ionic liquids
CONTE, VALERIA;
2007-01-01
Abstract
Among the various interesting features of vanadium(V) there is its ability to activate hydrogen peroxide in diverse oxidation reactions. In this respect, we proposed a simple and effective procedure for oxybromination of unsaturated substrates in a biphasic system H2O/CH2Cl2. Then, with the aim of rendering such a procedure even more interesting from the sustainability point of view, we have substituted chlorinated solvents with ionic liquids, ILs. Interestingly enough, we observed a remarkable increase of both yield and selectivity with styrene and ethynylbenzene, obtaining synthetically interesting results. Here we report results with other substrates in order to enlarge the scope of the reaction. Very preliminary data of peroxovanadium catalyzed hydroxylation of arenes in ILs are also mentioned.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
