New Strategies for N-Heterocyclic Carbenes Catalyzed Annulations

This thesis focuses on NHC-catalyzed annulation of nitroalkenes, enals and , -unsaturated carboxylic acids. (4) The readily available , -unsaturated carboxylic acids were first successfully employed to generate the , -unsaturated acyl azolium intermediates by using NHC for the enantioselective [3+2] and [3+3] annulations.