6-alkylamino-5-nitrosouracils (IV) with appropriate 6-chlorouracils. The compounds II oxidized cyclopentanol under neutral conditions to yield cyclopentanone and a remarkable autorecycling in the oxidation was observed.
Reaction of 6-amino-5-nitrosouracil derivatives with various substituted hydrazones of aldehydes led to the formation of the corresponding xanthine derivatives.