Осуществить превращения:
бензол+(Cl; FeCl3)-->A+(Mg)-->B+(CO2)-->C+(H2O; H+)-->D+(SOCl2)-->E+(C2H5ONa)-->F

C6H6 + Cl2 = C6H5Cl + HClC6H5Cl + Mg = C6H5MgClC6H5MgCl + CO2 = C6H5CO2MgClC6H5CO2MgCl + H2O = C6H5CO2H + Mg(OH)ClC6H5CO2H + SOCl2 = C6H5COCl + SO2 + HClC6H5COCl + C2H5ONa = C6H5CO2C2H5 + NaCl