1-Chloro-4-isocyanato-2-(trifluoromethyl) benzene → N-(4-(6-Chloropyrimidin-4yl-oxy)phenyl)-N'-(4-chloro-3-trifluoromethyl-phenyl)-urea

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Reaction Steps

To a solution of 4-(6-chloro-pyrimidin-4-yl-oxy)-aniline (Stage 21.1; 3.77 g, 15 mmol) in THF (40 ml) under N2-atmosphere, 4-chloro-3-trifluoromethylphenyl isocyanate (4.98 g, 22.5 mmol) dissolved in THF (20 ml) is added. After 1 h at rt the solution is diluted with AcOEt and NaHCO3 in water, the aqueous layer separated off and extracted twice with AcOEt. The organic phases are washed with water and brine, dried (Na2SO4) and concentrated in vacuo. Stirring of the resulting solid in Et2O finally yields the title compound: m.p.: 180-181° C.; 1H-NMR (DMSO-d6): 9.22 (s, HN), 8.97 (s, HN), 8.65 (s, 1H), 8.11 (s, 1H), 7.65 (m, 1H), 7.63 (m, 1H), 7.53 (d, 2H), 7.34 (s, 1H), 7.19 (d, 2H); Anal.: CHNClFO.

Provenance & Evidence