C20H17N3O3S → HCID 178432250, compound

Participants

Reaction Steps

(2-Methyl-1H-benzimidazol-5-yl)-hydrazine dihydrochloride (830 mg) was added to an ethanol solution (15 ml) of crude 2-(1-benzenesulfonyl-1H-indole-2-carbonyl)-3-dimethylamino acrylonitrile (1.17 g). The reaction mixture was heated with stirring under reflux for four hours. After cooling to room temperature, the mixture was allowed to stand at room temperature. The precipitated solid was collected by filtration, and washed with ethanol to give [5-amino-1-(2-methyl-1H-benzimidazol-5-yl)-1H-pyrazol-4-yl]-(1-benzenesulfonyl-1H-indol-2-yl)-methanone was obtained as a yellow solid (1.5 g, with a two-step yield of 91%).

Provenance & Evidence