1: 3-hydroxyhept-1-en-6-yne With sodium hydride in N,N-dimethyl-formamide T=0°C; 0.166667 h; 2: benzyl bromide in N,N-dimethyl-formamide 1 h;

1: 3-benzyloxyhept-1-en-6-yne With n-butyllithium in tetrahydrofuran T=0°C; 0.5 h; 2: methyl iodide in tetrahydrofuran 1 h;