Aromatic Synthesis Routes

Ever wondered how chemists build complex molecules from simple benzene? This synthesis pathway shows you exactly how it's done through a series of connected reactions.

Electrophilic substitution kicks things off with two major reactions. Nitration converts benzene to nitrobenzene using concentrated H₂SO₄ and HNO₃ below 55°C - keep it cool to avoid multiple substitutions! Friedel-Crafts acylation then transforms benzene into phenylketone using an acyl chloride, AlCl₃ catalyst, and dry conditions at 40°C under reflux.

From phenylketone, you've got multiple pathways. Nucleophilic addition with acidified KCN creates 2-hydroxy-2-phenylpropanenitrile at room temperature, whilst NaBH₄ in methanol reduces it to 1-phenylethanol.

The beauty of this scheme is how each product becomes a starting point for further reactions. Nitrobenzene reduces to phenylamine using Sn/conc HCl under reflux, then NaOH. Meanwhile, phenylamine undergoes nucleophilic substitution with CH₃Cl to form methylphenylamine, or acylation with CH₃COCl to create N-phenylethanamide.

Top Tip: Notice how the reaction conditions change dramatically between steps - temperature, catalysts, and solvents all matter for getting the right product!