An Yttrium‐Based Strong Lewis Acid for the Heterogeneous Catalysis of the Diels–Alder Reaction

Abstract

Excellent endo:exo selectivities can be achieved in heterogeneously catalyzed Diels-Alder reactions, even in the case of dienophiles such as 1-3 with cyclopentadiene. The key to the success is a new yttrium-based, strong Lewis acid catalyst, whose synthesis and characterization is described.