1: 3-phenyl-2-propyn-1-ol (phenyl propargyl alcohol) With sodium hydride in tetrahydrofuran T=20°C; 2 h; 2: 3-bromo-2-methylprop-1-ene in tetrahydrofuran T=20°C; 2 h;

1: 3-phenyl-2-propyn-1-ol (phenyl propargyl alcohol) With sodium hydride in tetrahydrofuran T=20°C; 2: 3-chloro-2-methyl-propene in tetrahydrofuran T=60°C; 1.5 h; Further stages.;