4,5-Dichloro-3-fluoro-1,2-phenylenediamine (3.37 g, 17.28 mmol), isopropyl isothiocyanate (2.10 g, 20.76 mmol), 1-cyclohexyl-3-(2-morpholinoethyl)carbodiimide metho-p-toluenesulfonate (9.52 g, 22.48 mmol) and pyridine (100 mL) were used according to general procedure I. The title compound was recrystallized from 1,4-dioxane to provide a tan solid (1.40 g, 31%); m.p. 212-215° C.; 1H NMR (DMSO-d6) δ: 11.15 (br s, 1H, NH), 7.21 (s, 1H, Ar—H), 6.99 (d, J=7.8 Hz, 1H, NH), 3.92 (m, 1H, CH), 1.21 (d, J=6.4 Hz, 6H, overlapping CH3).
