1: 1,2-bis(2-hexynyl)-3,4,5,6-tetrapropylbenzene With dibutylzirconocene T=-78 - 20°C; 2: octyne-4 With NiBr2(PPh3)2

n-butyllithium; N,N,N',N,-tetramethylethylenediamine; methyl iodide in hexane T=20 - 50°C; 4 h; Product distribution; Further Variations:Reagents;

hydrogenchloride; n-butyllithium