Gabriel phthalimide synthesis is used for the preparation of primary aromatic/primary aliphatic amines.

Explanation

### Step-by-Step Solution:

**Step 1: Understanding Gabriel Phthalimide Synthesis**
Gabriel Phthalimide synthesis is a method used to prepare primary amines. It involves the use of phthalimide as a starting material and is particularly useful because it avoids over-alkylation, which can occur in other amine synthesis methods.

**Step 2: Reaction with Potassium Hydroxide**
The first step of the synthesis involves treating phthalimide with potassium hydroxide (KOH). The KOH acts as a base and deprotonates the nitrogen atom in phthalimide, creating a nucleophilic species. The reaction can be represented as follows:
- Phthalimide + KOH → Potassium phthalimide (N-K⁺) + H₂O
...