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Synthesis of PCBs 91, 95, and 132 (15a–c) and the corresponding methoxylated PCB derivatives 16a–c, 17a–d and 18a–c using the Suzuki and the Ullmann coupling reaction. The monomethoxylated PCBs 16a–c and 17a–d were demethylated using an excess of BBr3 to yield the corresponding hydroxylated PCB derivatives 19a–c and 20a–d. DPDB = 2-dicyclohexylphosphino-2′,6′-dimethoxybiphenyl.
