1,3-di(propan-2-yl)-1,3-diazinane-2,4,6-trione

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1,3-Diisopropyl-2,4,6-(1H,3H,5H)-pyrimidinetrione was prepared by the dropwise addition of acetic anhydride (40 ml) over three hours to a solution of 1,3-diisopropylurea (7.5 g, 0.05 mole) and malonic acid (5.2 g, 0.05 mole) at 65° C. After the addition was completed, the temperature was raised to 90° C. and maintained for three hours. The solvent was evaporated under reduced pressure and the residue solidified upon cooling. 1,3-Diisopropyl-2,4,6-(1H,3H,5H)-pyrimidinetrione recrystallized from cyclohexane as colorless needles (7.3 g, 70% yield), m.p. 79°-82°. After the addition maintained for three hours The solvent was evaporated under reduced pressure upon cooling

Conditions: temp:90.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: 1,3-Diisopropyl-2,4,6-(1H,3H,5H)-pyrimidinetrione was prepared by the dropwise addition of acetic anhydride (40 ml) over three hours to a solution of 1,3-diisopropylurea (7.5 g, 0.05 mole) and malonic acid (5.2 g, 0.05 mole) at 65° C. After the addition was completed, the temperature was raised to 90° C. and maintained for three hours. The solvent was evaporated under reduced pressure and the residue solidified upon cooling. 1,3-Diisopropyl-2,4,6-(1H,3H,5H)-pyrimidinetrione recrystallized from cyclohexane as colorless needles (7.3 g, 70% yield), m.p. 79°-82°. After the addition maintained for three hours The solvent was evaporated under reduced pressure upon cooling