p-Toluenesulfonic acid → 4,6-Dichloro-N-(propan-2-yl)-1H-benzimidazol-2-amine

Participants

Reaction Steps

3,5-Dichloro-1,2-phenylenediamine (1.30 g, 7.32 mmol), isopropyl isothiocyanate (0.81 g, 8.00 mmol), 1-cyclohexyl-1-3-(2-morpholinoethyl)carbodiimide metho-p-toluenesulfonate (4.19 g, 9.89 mmol) and pyridine (25 mL) were used according to general procedure I. The product was recrystallized from 1,4-dioxane to afford 1.07 g (60%) of a white solid. Anal. calcd for C10H11Cl12N3-(0.25 C4H8O2): C, 49.64; H, 4.92; N, 15.79. Found: C, 49.54; H, 4.94; N, 15.79.

Provenance & Evidence