Advances in Organic Synthesis is a book series devoted to the latest advances in synthetic approaches towards challenging structures. It presents comprehensive articles written by eminent authorities on different synthetic approaches to selected target molecules and new methods developed to achieve specific synthetic transformations. Contributions are written by eminent scientists and each volume is edited by an authority in the field. Advances in Organic Synthesis is essential for all organic chemists in academia and the industry who wish to keep abreast of rapid and important developments in the field. This volume presents the following reviews: Catalytic Tandem Reactions Triggered by the Introduction of a Carbonyl Function Synthetic Applications of Bifunctional Knölker Type Iron Complexes as (De)hydrogenation Catalysts Superelectrophilic Activation of Alkynes, Alkenes, and Allenes Chitosan and its Derivatives: Synthesis Strategy and Applications Synthesis of N-Containing Heterocycles via Hypervalent Iodine(III)-Mediated Intramolecular Oxidative Cyclization Advancements in Ionic Liquids for the Formation of Morita Baylis-Hillman Adducts