In the following dissertation Suzuki-Miyaura cross-coupling reactions were developed for the arylation of complex poly-halogenated quinolone derivates and (4,3-a) bridged 1,2,4-triazolopyridines. Therefore different arylboronic acids could be linked to nitrogen containing heterocycles. The collected results of the chemo- and site-selectivity of the substances as well as the used catalytic systems could also be described. To guarantee high yields of the selected reaction, different palladium-catalysts were tested in optimization-reactions. Mono-dentate phosphine-palladium complexes were used as homogeneous catalysts and palladium on carbon as a heterogeneous catalyst. In total roud about 60 new substances could be isolated in good to very good yields and described.