O-allylated pudovik and passerini adducts as versatile scaffolds for product diversification

The palladium-catalyzed O-allylation of α-hydroxyphosphonates and α-hydroxyamides obtained from Pudovik and Passerini multicomponent reactions has allowed interesting and highly straightforward access to a variety of building blocks for product diversification. These post-functionalizations include a selective base- or ruthenium hydride-mediated isomerization/ Claisen rearrangement cascade and a ring-closing metathesis that allows access to a variety of diversely functionalized phosphonooxaheterocycles.