Efficient and convenient methods for the mono- and dibromination
of 1,3,5,7-tetramethyl-substituted BODIPYs were developed by using
copper(II) bromide as the bromination reagent under mild reactions,
in good to excellent yields. The selectivity of mono- or dibromination
depends strongly on the additives of the reactions.
copper - bromination - selectivity - fluorescent
dyes - 4,4-difluoro-4-bora-3a,4a-diaza-s-indacenes