SCHEDULED MAINTENANCE
Treatment of 6-anilinouracils with diethyl azodiformate led the corresponding alloxazines (benzo[g]pteridine-2,4-diones). This synthesis involves initial formation of Michael-type adducts [6-anilino-5-(1,2-bisethoxy-carbonylhydrazino)uracils] followed by dehydrogenative cyclization with further diethyl azodiformate.
F. Yoneda, S. Matsumoto, Y. Sakuma and S. Fukazawa, J. Chem. Soc., Perkin Trans. 1, 1975, 1907 DOI: 10.1039/P19750001907
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