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X l•..' \ ol. ) was added 3.65 g (0.028 mole) of sodium fluoropyruvate.13 On cooling overnight at 0°the desired compound crystallized, was removed by filtration, and washed with cold water, yielding 3.55 g (76%) of I. The product turned brown at ca. 185°, melting at 206-207°dec: lit.6 turns brown at 198-200°and decomposes at 205°. 5-Fluorometh>T-6-azauracil (II). A mixture of 1.0 g (6 mmoles) of I, 50 ml of SOCU, and I drop of dry pyridine was refluxed 1 hr (clear solution), allowed to stand overnight at room temperature, and evaporated to 15 ml in vacuo.On cooling II crystallized and was removed by filtration through sintered glass and washed with dry ether, yielding 550 mg (63%) after drying at. 80°in vacuo, mp 127-128°. A portion was recrystallized for analysis from chlorobenzene and dried at 80°in vacuo; needles, rap 127.5-129°; X% Et0H 265 µ (log c 3.78): X% Et0H 224 mg;