Reaction of 5,6-diamino-1,3-dimethyluracil with arylideneacetones and arylidenecyclanones

The reaction of 5,6-diamino-1,3-dimethyluracil dihydrochloride with mono- and diarylideneacetones and with cyclohexanones give 2,4-disubstituted 1,7,9-triazaspiro[4,5]dec-1-ene-6,8,10-triones. It was found that arylidenecyclopentanones form only 5-azomethines with retention of the amino group at position 6 of the uracil ring.Kharkov State University, Kharkov 310077, Ukraine; e-mail: desenko@univer.kharkov.ua. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1230–1233, September, 1999.