What is the best order of reactions to prepare the following compound from benzene?
CI
SO3H
[1] CH3CH2COCI, AICI3; [2] Cl2, FeCl3; [3] SO3, H2SO4
? [1] SO3, H2SO4; [2] Cl2, FeCl3; [3] CH3CH2CH2CI, AICI3
? [1] Cl2, FeCl3; [2] CH3CH2COCI, AICI3; [3] SO3, H2SO4
? [1] (CH3)2CHOH, H2SO4; [2] Cl2, FeCl3; [3] SO3, H2SO4
? [1] Cl2, FeCl3; [2] SO3, H2SO4; [3] (CH3)2CHOH, H2SO4