The Gabriel phthalimide synthesis can be used to prepare which class of amines?

In the Gabriel synthesis potassium phthalimide is alkylated by an alkyl halide in an ${\mathrm{S}}_{\mathrm{N}}2$ step, and hydrolysis or hydrazinolysis then releases the free amine. The nitrogen carries only one alkyl group, so only primary aliphatic amines form. Aryl halides do not undergo ${\mathrm{S}}_{\mathrm{N}}2$ with the phthalimide anion, so aniline cannot be made this way.