Benzene to Bromobenzene
Br2 and FeBr3 (or Fe or AlBr3)
Benzene to Chlorobenzene
Cl2 and FeCl3 (or Fe or AlCl3)
Benzene to Phenylethanone
CH3COCl [acylation]
Phenylethanone to Phenylethanol
NaBH4
Benzene to Methylbenzene
CH3Cl [alkylation]
Benzene to Nitrobenzene
Conc. HNO3 and Conc. H2SO4 [nitration]
Nitrobenzene to Phenylamine
Sn and Conc. HCl
Phenylamine to 2,4,6-tribromophenylamine
Br2