Three distinct aminocatalytic cascade reactions leading to enantiomerically pure spirocyclic benzofuranones have been devised, highlighting the ability of organocascade to generate high degrees of stereochemical and architectural complexity in a single chemical transformation.
Multiple approaches to enantiopure spirocyclic benzofuranones using organocatalytic cascade reactions
Chem. Commun. 2011, 47, 233-235.