C-C and C-N Coupling Reactions are useful methodologies for functionalization of organic structures, especially regarding the insertion of aryl groups in specific platforms. Chalcones are alpha, beta-unsaturated ketones widely explored in literature as a result of features such as easiness of preparation and highly modulating structure which allows the properties of these compounds to be directed for specific purposes (bioactive chalcones, luminescent chalcones, etc.) Its versatile structure allows it to be used as a platform for regioselective reactions in the olefin moiety and the structures also allows functionalization in the aryl fragment. For this purpose, the carbon-carbon and carbon-nitrogen reactions catalyzed by transition metals can be very useful tools, especially in the synthesis of polyarylated chalcones.The present work describes the use of metal-catalyzed coupling reactions in the synthesis of new beta-arilchalcones, alpha, beta-diarylchalcones and N-diaryl-substituted chalcones on the aromatic moiety. The manuscript is divided into two major parts: the first part deals with Heck and Suzuki Reactions in the alkene portion of chalcones, leading to compounds whose structures are in agreement with the proposed pharmacophore for allosteric inhibitors of the enzyme Phosphodiesterase 4 (PDE4). In the second part, the Ullmann Reaction is used as a key step in the synthesis of p-N-diarylated-chalcones, leading to a library of new fluorescent compounds.Regarding the arylation of the alkenyl moiety of chalcones, Heck reactions were carried out using different aromatic halides resulting in beta arylchalcones, in yields ranging from 20 to 85 porcento and E:Z ratios of approximately 75:25. From the stereoisomeric mixtures, the E-isomers could be isolated by simple precipitations in appropriate solvents. Competitive reactions were evaluated by GC to determine the influence of the different substituents on the aromatic rings over the reaction rate. alpha, beta-diaryl-chalcones were obtained from beta-aryl intermediates via sequential bromination/Suzuki coupling in yields of approximately 50 porcento. In the second part of this work the synthesis of diarylaminochalcones is described using a copper-catalyzed C-N coupling as the key step. Chalcones with D-n-D and D-n-A characteristics were obtained, as well as beta-arylchalcones with D-n-D design. The compounds that showed the most intense fluorescence were those with D-n-D characteristics. beta-arylation considerably decreases these compounds photoluminescence. Solvent effects were observed suggesting intramolecular charge transfer in the excited state. To relate the structure of the compounds with their emission characteristics, DFT experiments were performed.