Photocatalytic Functionalization of Dihydroquinoxalin-2-Ones with Pyrazolones
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Rostoll Berenguer, Jaume; Sierra-Molero, Francisco J.; Blay Llinares, Gonzalo; Pedro, José Ramón; Vila Descals, Carlos
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Aquest document és un/a article, creat/da en: 2022
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A visible-light photoredox functionalization of 3,4-dihydro-quinoxalin-2-ones with pyrazolones using an inexpensive organophotoredox catalyst is described. The reaction uses 9,10-phenanthrenedione as photocatalyst, a very simple and cheap photocatalyst, a HP single Blue LED (455 nm) as visible-light source and oxygen from air as terminal oxidant, obtaining the corresponding acetylated pyrazoles with good yields. The reaction can be extended to other nitrogen heterocycles such as 5-aminopyrazoles with good results. |
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