Abstract
3-α-Chlorobenzyl- and 3-benzoylquinoxalin-2-ones react with benzylamine in DMSO to give intermediate 3-(α-benzyliminobenzylidene)quinoxalin-2-one which is capable of existing in several tautomeric forms. The subsequent oxidative cyclocondensation leads to imidazo[1,5-a]quinoxalin-4-one. This new procedure for building up imidazo[1,5-a]quinoxalin-4-one system has been applied to the synthesis of various bis(imidazo[1,5-a]quinoxalin-4-ones).
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Mamedov, V.A., Kalinin, A.A., Gorbunova, E.A. et al. Fused Polycyclic Nitrogen-Containing Heterocycles: IX. Oxidative Fusion of Imidazole Ring to 3-Benzoylquinoxalin-2-ones. Russian Journal of Organic Chemistry 40, 1041–1046 (2004). https://doi.org/10.1023/B:RUJO.0000045201.90930.ff
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DOI: https://doi.org/10.1023/B:RUJO.0000045201.90930.ff