• Apr 2, 2026 mixed aldol condensation pinacolone piperonaldehyde colone's α-hydrogens are deprotonated to generate an enolate ion: The enolate acts as a nucleophile in the subsequent step. The tertiary nature of the ketone influences enolate stability. Step 2: Nucleophilic Attack on Piperonaldehyde The eno By Dallin Collier