An example of a subset of this type of reaction is the reaction of sulfur dioxide with butadiene, a cheletropic reaction.
An example of a subset of this type of reaction is the reaction of sulfur dioxide with butadiene, a cheletropic reaction. Photochemically induced examples include the DeMayo reaction. Many alkaloids are synthesized using the 1,3 dipolar variant of this subtype of pericyclic reactions, the [2+2] type of which is thermally forbidden. The endo product is preferred in the reaction of this type in which an alkene reacts with a conjugated diene to produce cyclohexene derivatives. The combination of unsaturated molecules to form a cyclic product with a reduction in bond multiplicity is, for 10 points, what kind of reaction exemplified by the Diels-Alder reaction?
An example of a subset of this type of reaction is the reaction of sulfur dioxide with butadiene, a cheletropic reaction.
{cycloaddition} [prompt on {pericyclic reactions} before mention; prompt on {Diels}-{Alder reaction} before mention; prompt on {DeMayo reaction} before mention; prompt on {1,3 dipolar cycloaddition} before mention; prompt on {cheletropic reactions} until mention; prompt on any answer that {includes} the names {Suarez} and {Sordo throughout}]