Synthesis of 3,5-Diaryl-4,4-difluoro-4-bora-3a,4a-diaza-s-indacene (BODIPY?) Dyes
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2-Aryl pyrroles 2 were formed via Suzuki coupling of arylboronic acids to N-BOC protected 2-bromopyrrole. These pyrroles were used to produce 3,5-diaryl BODIPY® dyes 1 having red-shifted fluorescence maxima relative to comparable alkyl-substituted systems. Absorption and fluorescence spectra of the compounds 1 are discussed.
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