acetic acid; triphenylphosphine; palladium diacetate in acetonitrile T=20°C; 24 h; Title compound not separated from byproducts;

potassium acetate; palladium diacetate; acetic acid T=40°C; 18 h; regioselective reaction;

tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran Yield given. Yields of byproduct given. Title compound not separated from byproducts;