Phenyl isocyanate → 4-amino-5-fluoro-2-oxo-N-phenylpyrimidine-1(2H)-carboxamide

Participants

Reaction Steps

To a suspension of 4-amino-5-fluoro-pyrimidin-2-ol* (0.25 g, 1.94 mmol) in dry N,N-dimethylformamide (DMF; 5 mL) was added phenyl isocyanate (0.231 mL, 2.13 mmol), and the mixture was stirred at room temperature for 1 h. The suspension was suction filtered, and washed with diethyl ether (Et2O; 3×10 mL). The resulting solid was air-dried overnight to yield 4-amino-5-fluoro-2-oxo-N-phenylpyrimidine-1(2H)-carboxamide (0.32 g, 66%) as a white solid: mp 275-277° C. dec; 1H NMR (300 MHz, DMSO-d6) δ 12.81 (s, 1H), 8.63 (s, 1H), 8.43 (d, J=7.25 Hz, 1H), 8.35 (s, 1H), 7.55 (d, J=7.58 Hz, 2H), 7.37 (t, J=7.58 Hz, 2H), 7.13 (t, J=7.25 Hz, 1H); ESIMS m/z 247.1 ([M−H]−).

Provenance & Evidence