New Strategies for N-Heterocyclic Carbenes Catalyzed Annulations

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