1 Institut de Chimie Moléculaire et des Matériaux d'Orsay, CNRS-UMR-8182, Université Paris-Saclay, Bât. H. Moissan. 19 avenue des sciences, 91400 Orsay, France.
The synthesis of bis-lactone and butenolide derivatives was described using alkylidene Meldrum's acid as nucleophiles. The process operates in a triple cascade through an auto tandem catalysis promoted by DBU.