Anomeric Spiro-Annulated Glycopyranosides: An Overview of Synthetic Methodologies and Biological Applications.- Cycloaddition Reactions of Sugar-Based Olefins, Nitrones and Nitrile Oxides: En Route to Saccharidic Spiroisoxazoli(di)nes.- Carbohydrate Spiro-heterocycles via Radical Chemistry.- Carbohydrate-Derived Spiroketals and Spirocyclic Lactones.- Cyanohydrins and Aminocyanides as Key Intermediates to Various Spiroheterocyclic Sugars.- Recent Advances in the Chemistry and Biology of Spirocyclic Nucleosides.- Spiroketal Phthalane C-Glycosides: Synthesis of Papulacandins and SGLT2 Inhibitors.- Spiro Iminosugars: Structural Diversity and Synthetic Strategies.