In my thesis, I described the direct functionalization of C–H bond catalyzed by ruthenium catalysts. I presented a way we can ensure the regioselectivity of C–H functionalization with the help of directing groups. With my experiments, I wanted to carry out direct arylation of the ortho site of 2-phenylimidazole with a ruthenium catalyst and with the help of the imidazole ring as a directing group. I used various aryl halides and phenylboronic acid as arylating reagents. With the purpose to optimize the conditions, I changed the temperature and heating time of the reactions. I showed that a higher temperature and a longer heating time have a positive effect on the course of the reaction, except in the case of using phenylboronic acid as arylating reagent. I found out that to ensure a more favorable course of reaction, I need to add cocatalysts to ruthenium catalysts (KOPiv and PPh3). Those compounds coordinate to ruthenium and thus form a catalyst complex, which then efficiently reacts with the starting compounds.
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