α,β‐Unsaturated δ‐lactones with multiply oxygenated side chains are a substructure found in a group of natural products with a broad range of biological activity. In their Full Paper on page 3305 ff., H. Waldmann et al. describe the parallel synthesis of all eight diastereomers of cryptocarya diacetate by asymmetric allylation reactions on a solid support with chiral allylboranes.