Investigation of the electronwith-drawing groups' effect on the bromination of bicyclic systems and oxidative bromination of different substrats in the presence ami̇no triphenolate tungsten (VI) complex catalyst

The low and high temperature bromination of 2,3-dicarbometoksibenzobarrelene with molecular bromine leads to rearrangements of the molecular skeleton and thus, leads to totally rearranged products. The low temperature bromination of 2,3-dicyano benzobarrelene with molecular bromine leads to both rearranged and non-rearrenged products, whereas the high temperature bromination of 2,3-dicyanobenzobarrelene leads largely to rearranged products and trace of non-rearranged products. Alkenes are important substrates for investigating active halogenating agents also used widely in biomimetic studies of haloperoxidation with a metal catalyst. In this study halogenation reactions are performed by amino triphenolate tungsten (VI) complex in presence of hydrogen peroxide and halogen anions. The bromo and chloroperoxidative activity of amino triphenolate tungsten (VI) complexes on different compounds have not been studied widely. Besides this, the recent results showed its catalytic performance in bromo and chloro haloperoxidation reactions on various compounds such as benzonorbornadiene, 1-octene, 1,3,5-trimethoxybenzene, anisole 1-hexine, indene, naphthalane, benzofurane, 2-heptanone, decanal.