tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=0°C;

1: (2-iodobenzyl)zinc bromide With copper (I) cyanide; lithium chloride in tetrahydrofuran T=-78 - 25°C; 0.5 h; 2: cyclopentylvinylketone With chloro-trimethyl-silane in tetrahydrofuran T=-78 - 20°C; 4 h;