Journal of Organic Chemistry p. 1835 - 1837 (1988)
Update date:2022-08-03
Topics:
Paquette, Leo A.
Gugelchuk, Melinda
Isodicyclopentafulvenes that carry an exocyclic para-substituted phenyl group as in 3 enter into Diels-Alder cycloaddition with highly reactive dienophiles exclusively from below-plane.The situation with the more sterically hindered and less reactive reagent (Z)-1,2-bis(phenylsulfonyl)ethylene is one where addition occurs from both faces.
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