Ethyl isocyanate → HCID 67499248, compound

Participants

Reaction Steps

To a solution of 3-methyl-1-(pyridin-3-yl)-1H-pyrazol-4-amine (0.1 g, 0.574 mmol) in DCM (5.74 ml) was added ethyl isocyanate (0.041 g, 0.574 mmol) and the reaction mixture was stirred at ambient temperature for 40 minutes. The reaction mixture had turned from a clear solution to a suspension with white solid material. The reaction mixture was concentrated and purified using silica gel chromatography (0-20% MeOH/DCM) to yield the title compound as a white solid (0.135 g, 95%): mp 197-200° C.; 1H NMR (400 MHz, CDCl3) δ 8.94 (d, J=2.3 Hz, 1H), 8.48-8.37 (m, 1H), 8.32 (s, 1H), 7.94 (d, J=8.3 Hz, 1H), 7.52 (br s, 1H), 7.41-7.25 (m, 1H), 5.79 (br s, 1H), 3.33-3.23 (m, 2H), 2.29 (d, J=2.9 Hz, 3H), 1.16 (dd, J=8.7, 5.7 Hz, 3H); ESIMS m/z 246 ([M+H]+), 244 ([M−H]−).

Provenance & Evidence