palladium diacetate; copper dichloride in tetrahydrofuran T=23°C; 3 h;

tetrakis(triphenylphosphine) palladium(0) in toluene T=23 - 100°C;

trifluoroacetic acid; cobalt(II) dibromide; zinc in acetonitrile CoBr2 and Zn dust activated with CF3CO2H reacted for 5 min with allyl chloride in MeCN, aryl halide and tributylstannyl chloride added simultaneously in MeCN at room temp., stirred for 1 h at 50°C;