1-Bromo-3-chloropropane → 3-benzyl-6-chloro-1-(3-chloropropyl)pyrimidine-2,4(1H,3H)-dione

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

To a suspension of 18.93 g (80 mmol) of 3-benzyl-6-chloropyrimidine-2,4(1H,3H)-dione and 17.69 g (128 mmol) of potassium carbonate in 120 ml of N,N-dimethylformamide, 15.8 ml (160 mmol) of 1-bromo-3-chloropropane was added at room temperature. This mixture was stirred at 90° C. for 3 hours. After cooling, the reaction mixture was concentrated to dryness; the resulting residue was dissolved in chloroform-water. After the organic layer was washed with water and dried, the solvent was distilled off to yield an oily substance, which was then purified by column chromatography (eluent, n-hexane/ethyl acetate=5/1→3/1) to yield 13.46 g (53.7%, light yellow powder) of the desired product.

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