Hemograf:   propyn--h2/katalizator---->A-------HCl-------->B----KOH/etanol---->C----Br----->D ------Zn----->E-------H2O/N+----->F

CH3-C≡CH + H2---kat--->CH3-CH=CH2 CH3-CH=CH2 + HCl---->CH3-CH(Cl)-CH3 CH3-CH(Cl)-CH3 + KOH---etanol--->CH3-CH=CH2 + KCl + H2O CH3-CH=CH2 + Br2---->CH3-CH(Br)-CH2-Br CH3-CH(Br)-CH2-Br + Zn---->CH3-CH=CH2 + ZnBr2 CH2=CH-CH3 + H2O---->CH3-CH(OH)-CH3