1: octyne-4 With dipropylzirconocene in tetrahydrofuran T=-78 - 20°C; 1 h; 2: dimethyl acetylenedicarboxylate With copper(l) chloride in tetrahydrofuran T=20°C; 1 h;

1: (4Z,6Z)-5,6-dipropyl-4,7-diiododeca-4,6-diene With n-butyllithium in diethyl ether T=-78°C; 1 h; 2: With aluminium trichloride in diethyl ether T=20°C; 1 h; 3: dimethyl acetylenedicarboxylate in diethyl ether T=-78 - 20°C;

dibutylzirconocene; ethene; hex-3-yne; copper(l) chloride Yield given. Multistep reaction. Yields of byproduct given;

dibutylzirconocene; ethene; copper(l) chloride Yield given. Multistep reaction. Yields of byproduct given;