Suzuki protocol, boron compounds

In contrast to solid-phase Suzuki couphng, very low amounts of the Pd-catalyst (0.2 mol%) were sufficient and high conversions (87-99%) to biaryls (65) were obtained to yield relatively pure products (>90%, GC/MS, NMR) after ultrafiltration. In some cases most of the polymer supported boronic compound precipitated during the reaction and therefore no further purification was required. Nonetheless, quantitative removal of catalyst traces was not yet possible with either work-up protocol. 

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