Aniline → Phenylurea

Participants

Reaction Steps

To a solution of aniline (2.51 g, 27 mmol) dissolved in glacial acetic acid (14 mL) and water (28 mL) was slowly added a solution of potassium cyanate (4.4 g, 54 mmol) dissolved in water (35 mL). The mixture stirred for 2 h at RT, filtered, washed with water and dried under reduced pressure to yield phenylurea as a white solid (1.85 g, 50% yield). 1H NMR (DMSO-d6): δ 8.47 (s, 1H), 7.38 (dd, J=8.4 Hz, 0.9 Hz, 2H), 7.2 (t, J=7.6 Hz, 2H), 6.88 (t, J=7.6 Hz, 1H), 5.81 (brs, 2H); MS (ESI) m/z: 137 (M+H+).

Provenance & Evidence