Nitric Acid → HCID 20130709, compound

Participants

Reaction Steps

A solution of 1.50 g of isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-4-methyl-2,6-dioxo-1(2H)-pyrimidinyl]-benzoate in 30 ml of methylene chloride at room temperature is treated with stirring with 2.0 ml of 100% nitric acid. The solution is then treated with 5 drops of concentrated sulphuric acid and stirred for 48 hours at room temperature. The reaction mixture is poured into 150 ml of ice/water, diluted with 100 ml of ethyl acetate and washed four times with 150 ml of water. The organic phase is dried over anhydrous sodium sulphate and evaporated to dryness under reduced pressure. The residue is recrystallized from diethyl ether. Isopropyl 2-chloro-4-fluoro-5-[3,6-dihydro-4-methyl-5-nitro-2,6-dioxo-1(2H)-pyrimidinyl]-benzoate, m.p. 202°-205° C., is obtained.

Provenance & Evidence