Organocatalytic Isomerization/Allylic Alkylation of O-Acylated Hemithioacetals and Its Application in Tandem Sequence to Access 2,7-Dioxabicyclo[2.2.1]heptan-3-one derivatives Huan-Qing Zhang, Ji-Ming Xi, Wei-Wei Liao*, J. Org. Chem. 2020, 85, 2, 1168-1180.