1: 1-n-heptyne With Br2BH-SMe2 in dichloromethane T=0°C; 2: With ammonium hydroxide; sodium hydroxide in dichloromethane 3: 2,3-dimethylbutane-2,3-diol in pentane T=20°C; Further stages.;

T=70 - 80°C;

magnesium sulfate in diethyl ether T=20°C; 1 h;

[RhCl(η2:η2-cycloocta-1,5-diene)]2; triethylamine; tri-cyclo-hexyl-phosphine in tetrahydrofuran T=25°C; 4 h; Inert atmosphere; regioselective reaction;