Table 2.

Oxidative coupling of various arenes 1 and acrylates 2 catalyzed by Pd(II)/HPMoV. ^a

^a A mixture of arene 1 (30 mmol) and olefins 2 (1.5 mmol) was reacted in the presence of Pd-catalyst (0.1 mmol, 6.7 mol %), H₄PMo₁₁VO₄₀·30H₂O (0.02 mmol, 1.3 mol %), NaOAc (0.08 mmol, 5.3 mol %) and acetylacetone (0.1 mmol, 6.7 mol %) in EtCOOH (5 mL). ^b β-methylcinnamates are formed in 11–16% yields as by-products. ^c Ratio of o:m:p. ^d Ethyl cinnamate was obtained in 5%. ^e Arene (5 mmol) was used. ^g Arene (3 mmol) was used. ^h 5 wt % Pd(OAc)₂/C was used instead of Pd(OAc)₂.