copper(l) iodide; bis-triphenylphosphine-palladium(II) chloride in acetonitrile T=60°C; 10 h;

1: 1-(t-butyldimethylsilyloxy)-3-butyne With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 1 h; 2: N-Methoxy-N-methyl-benzamide in tetrahydrofuran; hexane T=-78 - 20°C; 2 h; Further stages.;

bis-triphenylphosphine-palladium(II) chloride; copper(l) iodide; triethylamine T=20°C; Sonogashira coupling;