Hydroacylation is a powerful technique, that allows the formation of carbon-carbon bonds already functionalised by a ketone group and therefore synthetically useful. As it has been shown by Zhu et al. and Akiyama et al. benzothiazolines 2 have been used as hydroacylation reagents on electron-poor substrates 1. In both cases, aromatisation to benzothiazole (5) expels an acyl radical as soon as a radical is generated on benzothiazolines nitrogen. While Zhu et al. achieved this by creating a photolabile N-I-bond using hydroxybenziodoxolone (3) as an additive, Akiyama et al. used Ru(bpy)3Cl2.6H2O as photosensitiser. In both cases, however, additives or catalysts are needed. Additionally, Melchiorre et al. showed in a control reaction, that Hantzsch esters can act as a reservoir for alkyl radicals. Herein4, we present an alternative photochemical hydroacylation strategy for electron-poor alkenes 6 by the adaptation of Hantzsch esters 7 as a reservoir for acyl radicals, which can then be released upon direct photoexcitation without the need for any catalyst or additive. Furthermore, benzylidenemalononitrile-derived products 8 turned out to be easily oxidized to their fully conjugated counterpart by the addition of DDQ. (figure cannot be displayed) Figure 1. General idea and overview. References [1] Zhu et al., Org. Lett., 2019, 21, 5462-5466. [2] Akiyama et al., Chem. Commun., 2019, 55, 11171-11174. [3] Melchiorre et al., Angew. Chem. Int. Ed., 2017, 56, 15039-15043. [4] Bica-Schröder et al., Org. Biomol. Chem., 2022, 20, 7245-7249.