S-09 Synthetic Organic Chemistry: The Young Challengers S09-1 Development of an Effective Condensation Method for the Synthesis of Carboxylic Esters and Carboxamides. S09-2 Development of Site-Selective Cross-Coupling Using Oligoarene-Type Phosphines S09-3 Improvement of a large scale synthesis of S-5751 and exploration of of a novel synthestic route for reducing cost S09-4 Total Synthesis of Polycyclic Alkaloids Based on a Radical Cascade S09-5 Symmetry-Driven Synthesis of Polycyclic Natural Products S09-6 A Microgram-Scale Labeling of Biomolecules via Rapid 6π-Azaelectrocyclization: Application to PET Imaging