C 9 H 5 FN 2 O 3 S, monoclinic, P12 1 /c1(no. 14), a =5.574(4) Å,
Source of materialThe title compound was prepared by reacting 5-fluorouracil (5 mmol) with trithylamine (6 mmol) and thiophene-2-carbonyl chloride (5 mmol) in anhydrous acetonitrile stirred at 273 Kfor 2hours. The mixture was then stirred at room temperature over 12 hours, followed by aqueous work-up and extraction. The purified product was dissolved in the mixture of methanol and acetone (v/v =2/1). The resulting solution was left in air for afew days, yielding colorless column-shaped crystals.