“…[15] In materials chemistry, these compounds have recently found applications as thermally activated delayed fluorescence emitters (TADF) [16,17] or photosensitive compounds exhibiting two-photon induced photoisomerization -such compounds embedded into polymer films could be used for 3D-data storage. [18,19] From a synthetic point of view, 3-acylchromones are valuable precursors serving as electrophiles in 1,3nucleophilic addition, usually followed by pyrone ringopening, with subsequent cyclisation reactions yielding various (hetero)cyclic scaffolds, e. g. 2-hydroxybenzophenones, 6H-benzo[c]chromenes and benzo[c]coumarins. [20][21][22][23][24][25] Since 3-acylchromones are present in nature only scarcely (as metabolites of some plants [26] and fungi [27,28] ), it is thus necessary to develop facile and efficient synthetic protocols towards these compounds, enabling further study of their pharmacological properties as well as easy access to the valuable synthetic intermediates.…”