1: 94 percent / potassium 2-ethylhexanoate, tetrakis(triphenylphosphine)palladium, PPh3 / ethyl acetate / 2 h / 25 °C 2: 94 percent / sodium iodide / dimethylformamide / 20 h / 25 °C 3: m-chloroperbenzoic acid (MCPBA) / CH2Cl2 4: 54 percent / 85percent phosphoric acid, pyridine / dioxane / 5 h / Heating 5: 54 percent / potassium 2-ethylhexanoate, tetrakis(triphenylphosphine)palladium, PPh3 / CH2Cl2; ethyl acetate / 1 h / Ambient temperature View Scheme

tetrakis(triphenylphosphine) palladium(0); 2-ethyl-hexanoic acid potassium salt; triphenylphosphine in ethyl acetate T=25°C; 2 h;

tetrakis(triphenylphosphine) palladium(0); 2-ethyl-hexanoic acid potassium salt; triphenylphosphine in ethyl acetate T=25°C; 2 h; other penicyllin G allylic esters, allylic carbonates, and carbamates, other solvents; Product distribution;

tetrakis(triphenylphosphine) palladium(0); 2-ethyl-hexanoic acid potassium salt; triphenylphosphine in ethyl acetate T=25°C; 2 h;