Benzyl isocyanate → HCID 178484258, compound

Participants

Reaction Steps

To a suspension of N′-(5-fluoro-2-hydroxy-pyrimidin-4-yl)-N,N-dimethylformamidine (0.25 g, 1.35 mmol) in CH2Cl2 (5 mL) was added benzyl isocyanate (0.187 mL, 1.49 mmol) forming a solution that was stirred at room temperature overnight. The mixture was diluted with CH2Cl2 (100 mL) and was washed with brine (2×50 mL). The combined aqueous layers were extracted with CH2Cl2 (2×25 mL). The organic extracts were dried over sodium sulfate (Na2SO4), filtered and concentrated. The residue was purified by normal phase chromatography (gradient, methanol/CH2Cl2) and then by reverse phase chromatography (gradient, acetonitrile (CH3CN) in water (H2O)). The resulting solution was concentrated under reduced pressure forming a precipitate. The mixture was extracted with CH2Cl2 (4×100 mL), dried (Na2SO4), filtered and concentrated to yield (E)-N-benzyl-4-((dimethylamino)methyleneamino)-5-fluoro-2-oxopyrimidine-1(2H)-carboxamide (0.268 g, 62%) as a white solid: mp 147-150° C.; 1H NMR (300 MHz, CDCl3) δ 10.83 (t, J=4.94 Hz, 1H), 8.81 (s, 1H), 8.44 (d, J=6.59 Hz, 1H), 7.32-7.22 (m, 5H), 4.56 (d, J=5.93 Hz, 2H), 3.21 (s, 3H), 3.20 (s, 3H); ESIMS m/z 318.2 ([M+H]+).

Provenance & Evidence