Synthesis of Biphenyl Compounds in the Presence of New Polymer Particles
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We synthesized new porous crosslinked polymer particles (DS28D and PDOPAM) from new acrylamide based monomer in the presence of divinyl benzene by a suspension polymerization. The polymer particles was used as a polymer reagent for conventional coupling reactions : aromatic halides were reduced to the resulting coupling compounds using a palladium catalyst in water in the presence of the prepared polymer particles without any organic solvents at mild conditions. Unlike the conventional coupling reaction systems, the use of small amount of the polymer reagent enables the highly selective coupling reaction of aryl halides to biphenyl compounds due to its fixation and orientation effects.