The Organocatalyzed Diels Alder Cycloaddition Reaction : Mechanism and Transition
For the production of polycyclic compound, Diels-Alder’s cycloaddition is an important reaction in organic Chemistry. An organocatalyst is an organic compound which acts as a catalyst to a reaction. The catalyst in the Diels Alder reaction is usually an amine, or quinidine. Two steps are required for the organocatalyst to be involved in the reaction. The first is when the catalyst reacts with dienophile to create a cationic compound. The diene, the first reactant of the Diels Alder reaction, attacks this cationic species. A subsequent reaction results in the formation of a transition condition, which is characterized by a high-energy intermediate. This four-membered transition state has two double and two single bond single bonds. As the reaction continues, the transition states are converted to the product of reaction which is acyclohexene.