copper(l) iodide; potassium carbonate; triethylamine; tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran; methanol 1) Me3SiCCH, Pd(PPh3)4, CuI,Et3N in THF, room temp., 2 h; 2) K2CO3 in MeOH, room temp., 2 h; 3)(n-Bu)Sn(n-Bu)CuCNLi2 in THF, -30°C for 1.5 h;

1H-imidazole in N,N-dimethyl-formamide T=0 - 20°C; Inert atmosphere;