zinc(II) chloride; tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran 1) -25 deg C, 3.5 h, 2) room temperature, 16 h, 3) reflux, 4 h; Further byproducts given. Yields of byproduct given;

lithium dimethyl cuprate in diethyl ether T=-78°C; 4 h;