2-Substituted-4-quinolones 2 and the corresponding 2,3-dihydro-2-substituted-4-quinolones 3 have been obtained by reduction with CO at 170 °C and 30 atm of 2-nitrochalcones 1, catalysed by Ru3(CO)12 with DIAN-Me as co-catalyst in ethanol–water.
S. Tollari, S. Cenini, F. Ragaini and L. Cassar, J. Chem. Soc., Chem. Commun., 1994, 1741 DOI: 10.1039/C39940001741
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