Eosin Y-catalyzed visible-light-mediated aerobic transformation of pyrazolidine-3-one derivativesPetek, Nejc (Avtor) Grošelj, Uroš (Avtor) Svete, Jurij (Avtor) Požgan, Franc (Avtor) Kočar, Drago (Avtor) Štefane, Bogdan (Avtor) pyrazolidine-3-oneseosin Yvisible lightphotoredox catalysisBy utilizing an underexplored reactivity of N1-substituted pyrazolidine-3-ones, we developed a visible-light-induced aerobic oxidation of N1-substituted pyrazolidine-3-one derivatives yielding the corresponding azomethine imines. The resulting azomethine imines can be further reacted with ynones in situ under copper catalyzed [3 + 2] cycloaddition reaction conditions yielding the corresponding pyrazolo[1,2-a]pyrazoles in good yields. The methodology can be extended to other 1-aryl-substituted pyrazolidinones which undergo endocyclic oxidation deriving the corresponding pyrazolones as single products.20202022-01-03 15:00:50Članek v reviji134247UDK: 547.77:544.47ISSN pri članku: 2073-4344DOI: 10.3390/catal10090981COBISS_ID: 27805187sl