Formation of benzoic acid in the palladium(II) catalyzed cleavage of phenyl-antimony and phenyl-phosphorus groups of Ph3Sb and Ph3P

Transition-metal-mediated phosphorus-carbon bond cleavage and its relevance to homogeneous catalyst deactivation

“…In a similar fashion, when PdCl2(PPh3)2 was heated to 180-200 °C in toluene under an atmosphere of C02 a 15-40% yield of benzoic acid was obtained. 73 It was proposed that the benzoic acid formed via C02 insertion into a Pd-Ph intermediate.…”