Problems and exercisesLidocaine

Chloroacetyl chloride is used in the first step of the synthesis of lidocaine. Why does the aniline react with the acyl chloride and not with the CH₂Cl? What is the sodium acetate for?

Procaine is 2-(diethylamino)ethyl 4-aminobenzoate. Propose its retrosynthesis and synthesis, and explain why its duration of action is shorter than that of lidocaine.