1: 1-(trimethylsilyl)-1,7-octadiyne With n-butyllithium in tetrahydrofuran; hexane T=-78°C; 0.166667 h; 2: triisopropylsilyl chloride in tetrahydrofuran; hexane T=-78 - 20°C;

T=23°C;

1: 1.) n-BuLi / 1.) THF, HMPA, -78 deg C; 2.) THF, HMPA, -78 deg C to 23 deg C 2: 97 percent / 23 °C View Scheme