1) H3C-CH(OSO3H)-CH3 + H2O = H3C-CH(OH)-CH3 (А) + H2SO4;
2) H3C-CH(OH)-CH3 + PCl5 = H3C-CH(Cl)-CH3 (Б) + POCl3 + HCl;
3) H3C-CH(Cl)-CH3 + Mg = H3C-CH(MgCl)-CH3 (В);
4) C6H5-CHO + H3C-CH(MgCl)-CH3 = C6H5-CH(OMgCl)-CH(CH3)2 (Г);
5) C6H5-CH(OMgCl)-CH(CH3)2 + H2O (+H+) = C6H5-CH(OH)-CH(CH3)2 (Д) + Mg(OH)Cl.