[2,3]-Sigmatropic Rearrangements of Allylic Sulfur Compounds.- [2,3]Sigmatropic Rearrangements of Propargylic and Allenic Systems.- Sulfur Participation in [3,3]-Sigmatropic Rearrangements.- Thione–Thiol Rearrangement: Miyazaki–Newman–Kwart Rearrangement and Others.- The Smiles Rearrangement and the Julia–Kocienski Olefination Reaction.