SCHEDULED MAINTENANCE
Treatment of 5-nitro-6-(N-substituted-anilino)-uracils with the Vilsmeier reagent (dimethylformamide–phosphorus trichloride oxide) gave the corresponding 8-chloroflavins; the Vilsmeier reagent acted as a reducing agent as well as a dehydrating and chlorinating agent.
F. Yoneda, Y. Sakuma and K. Shinozuka, J. Chem. Soc., Chem. Commun., 1977, 681 DOI: 10.1039/C39770000681
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