1: anhydrous 1-octyne With iso-propylmagnesium bromide in tetrahydrofuran T=20°C; 2 h; 2: (1Z,3Z)-1,4-diiodo-2-hexyl-1-(trimethylsilyl)-1,3-decadiene With tetrakis(triphenylphosphine) palladium(0) in tetrahydrofuran T=20°C; 12 h;

tetrabutyl ammonium fluoride in tetrahydrofuran T=0°C; 2 h;