1) H3C-CH2-CHCl2 + 2KOH (вод. р-р) = H3C-CH2-C(O)H (X1) + 2KCl + H2O;
2) 3H3C-CH2-C(O)H + K2Cr2O7 + 4H2SO4 = 3H3C-CH2-COOH + K2SO4 + Cr2(SO4)3 + 4H2O;
3) H3C-CH2-COOH + Cl2 (+P крас.) = H3C-CH(Cl)-COOH (X2) + HCl;
4) H3C-CH(Cl)-COOH + NaHCO3 = H3C-CH(Cl)-COONa (X3) + CO2 + H2O;
5) H3C-CH(Cl)-COONa + H3C-CH2-Br = H3C-CH(Cl)-C(O)-O-CH2-CH3 (X4) + NaBr.