1 Regio- and Stereoselective Synthesis of Spiropyrrolizidinesand Piperazines through Azomethine Ylide Cycloaddition Reaction Saoussen Haddad, †,‡ Sarra Boudriga, † François Porzio, ‡ Armand Soldera, ‡ Moheddine Askri, †,* Michael Knorr, § Yoann Rousselin, ∥ Marek M. Kubicki, ∥ Christopher Golz, ٣ Carsten Strohmann ٣ † Laboratory of Heterocyclic Chemistry Natural Product and Reactivity/LCHPNR, Department of Chemistry, Faculty of Science of Monastir, 5000 Monastir, Tunisia ‡ Department of Chemistry, Quebec Center for Functional Materials,University of Sherbrooke, Sherbrooke, Québec, Canada, J1K 2R1 § Institut UTINAM - UMR CNRS 6213, Université de Franche-Comté, 16 Route de Gray, F- 25030 Besançon, France ∥ Institut de Chimie Moléculaire - UMR CNRS 6302, Université de Bourgogne, 9 Avenue A. Savary, F-21078 Dijon, France ٣ Technische Universität Dortmund, Anorganische Chemie, Otto-Hahn-Strasse 6, 44221 Dortmund, Germany *e-mail: moheddine.askri@fsm.rnu.tn ; phone: +216 98676187 Abstract Graphics ABSTRACT