Dicarbonyl compounds have the ability to self-condensate through cyclization. When a diketone or dialdehyde self-condensate, the resulting product is called a cyclic enone.
Concept #1: Diketones
When a diester self-condensates, the resulting product is called a cyclic β-ketoester.
Concept #2: Diesters (Dieckmann Condensation)
Practice: Consider the following reaction. Provide a stepwise mechanism to explain the given transformation.