In this master's thesis, we explored the synthesis of various difluorodioxa and diaryldioxa boron complexes. Through condensation reactions, we prepared dioxo compounds from ketones (both cyclic and acyclic) using acetic and triflic acid and trifluoroacetic anhydride. These dioxo compounds served as precursors for further complexation. Initially, we synthesized difluorodioxa boron complexes using trifluoroborate etherate in DCM, followed by the preparation of diaryldioxa boron complexes. The latter were synthesized using phenylboronic acids in the presence of potassium phosphate using 1,4-dioxane as solvent. UV-VIS spectra of the prepared compounds were recorded, and absorption maxima were determined. In the final part, we conducted the photochemical De Mayo reaction. Prepared complexes were reacted with cyclic non-activated olefins leading to [2+2] cycloadditions and retro-aldol reactions, resulting in the corresponding 1,5-diketones.
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