Synthesis of mono-(p-dimethylamino)styryl-containing BOPHY dye for a turn-on pH sensor

Abstract

Mono-substitutional BOPHY <bold>3a</bold> with a (<italic>p</italic>-dimethylamino)styryl group in the α-position was confirmed to be synthesized by the Knoevenagel-type condensation. Dimethylamino-containing BOPHY <bold>3a</bold> can be used as a pH probe.