4-(Dimethylamino)phenylboronic acid is a useful reagent for Suzuki-Miyaura cross-coupling reactions, Rhodium (Rh)-catalyzed asymmetric addition reactions, Palladium (Pd)-catalyzed C-OH bond activation. This reagent is used in Preparation of Push-pull arylvinyldiazine chromophores, Helical ortho-phenylene oligomers with terminal push-pull substitution, Alginate-supported cation-Pd nanoparticle gels as catalysts for the Suzuki-Miyaura cross-coupling reaction, Organic dyes for dye-sensitized solar cells.