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Report | Regular issue | Vol 6, No. 11, 1977, pp.1911-1914
Published online, 1st January, 1970
DOI: 10.3987/R-1977-11-1911
Preparation of 3-Anilino-5-diazouracils and Their Conversion into Indolo[2,3-d]pyrimidines

Yoshiharu Sakuma and Fumio Yoneda*

*Faculty of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-hon-machi, Kumamoto 862-0973, Japan


The diazotization of 5-amino-3-methyl-6-(N-substitutedanilino)uracils with sodium nitrite in acetic acid led to the formation of the corresponding stable 5-diazouracils, which were converted into 3-methyl-9-substituted indolo[2,3-d]pyrimidine-2,4(1H,3H)diones by both photolysis and thermolysis.