Nitration of 2-Substituted Pyrimidine-4,6-diones, Structure and Reactivity of 5,5-<i>gem</i>-Dinitropyrimidine-4,6-diones

Abstract

Nitration of some 2-substituted pyrimidine-4,6-diones in sulfuric acid was studied, which afforded previously unknown 5,5-gem-dinitropyrimidine-4,6-diones in high yields. The gem-dinitro products were easily attacked by nucleophiles with concomitant formation of gem-dinitroacetyl derivatives, which in turn could be further hydrolyzed to salts of dinitromethane and triureas.