which-step-is-crucial-in-the-diels-alder-reaction-mechanism-involving-furan-as-a

Question

Which step is crucial in the Diels-Alder reaction mechanism involving furan as a conjugated diene?

Accepted Answer

Simultaneous formation of two sigma bonds.

Answer

Electrophilic aromatic substitution.

Answer

Formation of a carbocation intermediate.

Answer

Nucleophilic attack by the dienophile.