Regioselective bromination of organic substrates by tetrabutylammonium bromide promoted by V2O5-H2O2: an environmentally favorable synthetic protocol

[reaction: see text] Vanadium pentoxide very effectively promotes the bromination of organic substrates, including selective bromination of some aromatics, by tetrabutylammonium bromide in the presence of hydrogen peroxide; mild conditions, high selectivity, yield, and reaction rate, and redundancy of bromine and hydrobromic acid are some of the major advantages of the synthetic protocol.