1) H3C-CH(Cl)-CH3 + Mg (ТГФ или (C2H5)2O) = H3C-CH(MgCl)-CH3;
2) H3C-CH(MgCl)-CH3 + C2H5-CHO = C2H5-CH(O-MgCl)-CH(CH3)2;
3) C2H5-CH(O-MgCl)-CH(CH3)2 + H2O = C2H5-CH(OH)-CH(CH3)2 + Mg(OH)Cl;
4) C2H5-CH(OH)-CH(CH3)2 + H3C-COOH (+H+) =
H3C-C(O)-O-CH(C2H5)-CH(CH3)2 + H2O.