Formation of a cyclic transition state during enolate formation which controls formation of E-enol or Z-enol
Aldol condensation - leading to aldol or ketol which can undergo dehydration to produce the alpha,beta-unsaturated aldehyde or ketone
Aldol Condensation – Acid Catalyzed
Base catalyzed dehydration of aldol or ketol leading to alpha,beta-unsaturated carbonyl compound.